AWWA C509 2023
$59.17
AWWA C509-23 Resilient-Seated Gate Valves for Water Supply Service
| Published By | Publication Date | Number of Pages |
| AWWA | 2023 | 52 |
The purpose of this standard is to provide the minimum requirements for resilient-seated gate valves for water supply service, including application, materials, design, testing, inspection, rejection, marking, and shipping.
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| 1 | C509-23 C509-23 C509-23 C509-23 ANSI/AWWA (Revision of ANSI/AWWA C509-15) Resilient-Seated Gate Resilient-Seated Gate Resilient-Seated Gate Valves for Water Supply Service Effective date: June 1, 2023. Effective date: June 1, 2023. First edition approved by Board of Directors Jan. 28, 1980. This edition approved Jan. 12, 2023. Approved by American National Standards Institute Jan. 6, 2023. |
| 2 | AWWA Standard AWWA Standard AWWA Standard AWWA Standard This document is an American Water Works Association (AWWA) standard. It is not a specification. AWWA standards describe minimum requirements and do not contain all of the engineering and administrative information normally contained in specifications. The AWWA standards usually contain options that must be evaluated by the user of the standard. Until each optional feature is specified by the user, the product or service is not fully defined. AWWA publication of a standard does not constitute endorsement of American National Standard An American National Standard implies a consensus of those substantially concerned with its scope and provisions. An American National Standard is intended as a guide to aid the manufacturer, the consumer, and the general public. The existence of an American National Standard does not in any respect preclude anyone, whether that person has approved the standard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standard. American National Sta Caution notiCe: The American National Standards Institute (ANSI) approval date on the front cover of this standard indicates completion of the ANSI approval process. This American National Standard may be revised or withdrawn at any time. ANSI procedures require that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of ANSI approval. Purchasers of American National Standards may receive current information on all standards by calling or writing the America ISBN-13, print: 978-1-64717-141-4 ISBN-13, electronic: 978-1-61300-672-6 DOI: http://dx.doi.org/10.12999/AWWA.C509.23 All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including scanning, recording, or any information or retrieval system. Reproduction and commercial use of this material is prohibited, except with written permission from the publisher. Copyright © 2023 by American Water Works AssociationPrinted in USA All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including scanning, recording, or any information or retrieval system. Reproduction and commercial use of this material is prohibited, except with written permission from the publisher. Please send any requests or questions to [email protected]. |
| 3 | Committee Personnel Committee Personnel The C509 Subcommittee, which updated and reviewed this standard, had the following personnel at that time: T.Chad Harbour, Chair P.Berken (alternate), American Flow Control, Beaumont, Tex. J.Bolender, J & S Valve, Huffman, Tex. L.R. Dunn, U.S. Pipe & Foundry Company, Birmingham, Ala. P.Gifford (alternate), Mueller Water Products, Chattanooga, Tenn. J.W. Green, Lockwood, Andrews & Newnam, Oakbrook Terrace, Ill. T.C. Harbour, Mueller Water Products, Decatur, Ill. T.R. Ingalls (alternate), EJ, USA Inc., East Jordan, Mich. C.Keeling, US Valve/Champion Valves, Linthicum, Md. T.Klein, Aqua America, Inc., West Chester, Pa. R.L. Larkin (alternate), J & S Valve, Birmingham, Ala. M.Lobik, Springfield Water and Sewer Commission, Agawam, Mass. R.Looney, American AVK Company, Minden, Nev. N.O. Mejia, L.A. Department of Water and Power, Los Angeles, Calif. T.O’Shea, Val-matic, Elmhurst, Ill. D.Peirce, Clow Valve Co./McWane Inc., Oskaloosa, Iowa B.Rohdenburg, Kennedy Valve, Elmira, N.Y. D.Scott, American Flow Control, Birmingham, Ala. K.J. Wright, EJ, USA Inc., East Jordan, Mich. The AWWA Standards Committee on Gate Valves and Swing Check Valves, which reviewed and approved this standard, had the following personnel at the time of approval: J.Warren Green, Chair Dan Stickel, Vice-Chair General Interest Members J.W. Green, Lockwood, Andrews, & Newnam, Oakbrook Terrace, Ill. J.Hebensreit, Underwriters Laboratories Inc., Northbrook, Ill. M.C. Johnson, Utah State University Water Research Laboratory, Logan, Utah E.Meek (liaison, nonvoting), Standards Engineer Liaison, AWWA, Denver, Colo. |
| 4 | K.LeBrasse, Burns and McDonnell, Denver, Colo. J.Olson, Advanced Engineering and Environmental Services, Grand Forks, N.D. T.R. Volz, AECOM, Denver, Colo. Producer Members J.Bolender, J & S Valves, Huffman, Tex. P.Berken (alternate), American Flow Control, Beaumont, Tex. D.E. Burczynski (alternate), Kennedy Valve, Elmira, N.Y. J.Clifton, McWane Plant & Industrial, Birmingham, Ala. S.S. Dalton, Val-Matic Valve & Manufacturing Corp., Elmhurst, Ill. P.Gifford (alternate), Mueller Water Products, Chattanooga, Tenn. T.C. Harbour, Mueller Water Products, Decatur, Ill. R.L. Larkin (alternate), J & S Valve, Gardendale, Ala. C.Keeling, U.S. Valve/Champion Valve, Linthicum Heights, Md. R.Looney, American AVK Company, Minden, Nev. M.Page, EJ, USA Inc., East Jordan, Mich. D.B. Scott, American Flow Control, Birmingham, Ala. T.O’Shea (alternate), Val-Matic Valve & Manufacturing Corp., Elmhurst, Ill. J.H. Wilber (alternate), American AVK, Littleton, Colo. K.J. Wright (alternate), EJ, USA Inc., East Jordan, Mich. User Members A.Bodulow, Los Angeles Water & Power, Los Angeles, Calif. B.Hasanabadi, Colorado Springs Utilities, Colorado Springs, Colo. S.Hattan, Tarrant Regional Water District, Fort Worth, Tex. K.S. Jeng-Bulloch, City of Huntsville, Huntsville, Tex. M.Lobik, Springfield Water and Sewer Commission, Agawam, Mass. K.C . Morgan (liaison, nonvoting), Standards Council Liaison, San Diego County Water Authority,San Diego, Calif. C.A. Norris, Montgomery Water Works & Sanitary Sewer Board, Montgomery, Ala. A.Quiniones (alternate), US Bureau of Reclamation, Denver, Colo. D.Rausch, City of Aurora Water Department, Aurora, Colo. P.J. Ries, Denver Water, Denver, Colo. V.Stariha, US Bureau of Reclamation, Denver, Colo. D.Stickel, Saginaw-Midland Municipal Water Supply Corp., Bay City, Mich. R.E. Tierney, Weir River Water System, Hingham, Mass. |
| 5 | Contents Contents All AWWA standards follow the general format indicated subsequently. Some variations from this format may be found in a particular standard. SEC. PAGE SEC. PAGE Foreword Foreword Foreword vii I Introduction …………………………….. vii I.A Background ………………………………. vii I.B History …………………………………….. vii I.C Acceptance ……………………………….. II Special Issues …………………………….. ix II Special Issues …………………………….. ix II.A Chlorine and Chloramine II.A Chlorine and Chloramine Degradation of Elastomers …….. ix III Use of This Standard ………………….. ix III Use of This Standard ………………….. ix III.A Purchaser Options and Alternatives … ix III.A Purchaser Options and Alternatives … ix III.B Modification to Standard ……………. xi III.B Modification to Standard ……………. xi IV Major Revisions …………………………. xi IV Major Revisions …………………………. xi V Comments ……………………………….. xiii V Comments ……………………………….. xiii Standard Standard 1 General 1 General 1.1 Scope ………………………………………. 1 1.1 Scope ………………………………………. 1 1.2 Purpose ……………………………………. 2 1.2 Purpose ……………………………………. 2 1.3 Application ……………………………….. 2 1.3 Application ……………………………….. 2 2 References ……………………………….. 2 2 References ……………………………….. 2 3 Definitions ………………………………. 5 3 Definitions ………………………………. 5 4 Requirements 4 Requirements 4.1 Data to Be Supplied by the 4.1 Data to Be Supplied by the Manufacturer ………………………. 6 4.2 Materials ………………………………….. 7 4.2 Materials ………………………………….. 7 4.3 General Design ………………………….. 10 4.3 General Design ………………………….. 10 2 4.4 ………………………. 1 Detailed Design 4.5 Fabrication ……………………………….. 23 4.5 Fabrication ……………………………….. 23 5 Verification 5 Verification 5.1 Testing …………………………………….. 24 5.1 Testing …………………………………….. 24 5.2 Plant Inspection and Rejection …….. 25 5.2 Plant Inspection and Rejection …….. 25 6 Delivery 6 Delivery 6.1 Marking …………………………………… 26 6.1 Marking …………………………………… 26 6.2 Preparation for Shipment ……………. 26 6.2 Preparation for Shipment ……………. 26 6.3 Affidavit of Compliance ……………… 26 6.3 Affidavit of Compliance ……………… 26 Aes ppendix A Installation, Operation, and Maintenance of Resilient-Seated Gate Valves ………………………….. 27 A.1 General ……………………………………. 27 A.1 General ……………………………………. 27 A.2 Unloading ………………………………… 27 A.2 Unloading ………………………………… 27 A.3 Receiving Inspection ………………….. 28 A.3 Receiving Inspection ………………….. 28 A.4 Storage …………………………………….. 28 A.4 Storage …………………………………….. 28 A.5 Installation ……………………………….. 28 A.5 Installation ……………………………….. 28 A.6 Maintenance …………………………….. 31 A.6 Maintenance …………………………….. 31 A.7 Repairs …………………………………….. 33 A.7 Repairs …………………………………….. 33 B Valve Bypasses …………………………… 35 B .1 General ……………………………………. 35 B .2 Filling a Pipeline ………………………… 35 B .3 Pressure Equalization ………………….. 35 B .4 Types of Bypasses ………………………. 36 Tables 1 Design Torque …………………………… 11 1 Design Torque …………………………… 11 2 Minimum Full Waterway Sizes …….. 11 2 Minimum Full Waterway Sizes …….. 11 |
| 6 | 3 Minimum Thickness of Body and 3 Minimum Thickness of Body and Bonnet ……………………………….. 12 4 Minimum Thickness for Ductile- 4 Minimum Thickness for Ductile- Iron Connecting End Flanges …. 13 5 Excess Flange Thickness ……………… 14 5 Excess Flange Thickness ……………… 14 6 Stem, Gate, Thrust Collar, and Stem 6 Stem, Gate, Thrust Collar, and Stem Nut Copper Alloys ……………….. 16 7 Stainless-Steel Valve Stem Alloys …… 17 7 Stainless-Steel Valve Stem Alloys …… 17 8 Proof-of-Design Torque ………………. 18 8 Proof-of-Design Torque ………………. 18 9 Minimum Diameter of Stem and 9 Minimum Diameter of Stem and Minimum Number of Turns to Fully Open ………………………….. 19 10 Outside Diameter of Handwheels … 21 10 Outside Diameter of Handwheels … 21 11 Gear Ratios ………………………………. 23 11 Gear Ratios ………………………………. 23 SEC. PAGE SEC. PAGE SEC. PAGE SEC. PAGE |
| 7 | Foreword Foreword This foreword is for information only and is not a part of ANSI*/AWWA C509. *American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. *American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. I.Introduction. I.A. Background. This standard describes resilient-seated gate valves withnonrising stems (NRS) and outside screw-and-yoke (OS&Y) rising stems, including tapping gate valves for water supply service. The resilient-seated gate valve has been in service in various water utility applications since 1975. I.B. History. The first edition of ANSI/AWWA C509, Resilient-Seated GateValves, was published in 1980. ANSI/AWWA C509 includes body and bonnet parts of either gray or ductile cast iron with shell-wall thicknesses equal to those of ANSI/AWWA C500, Metal-Seated Gate Valves, which was first issued in 1952 as ANSI/AWWA C500 but had its roots going back to the first AWWA standard for gate valves adopted on June 24, 1913. The Manufacturers Standardization Society of the Valves and Fittings Industry (MSS) has played an important role in developing this standard. Founded in 1924, MSS has had official organizational representation on AWWA standards committees dealing with valve and hydrant products since 1930. The first edition of ANSI/AWWA C509 was approved by the AWWA Board of Directors on Jan. 28, 1980, with subsequent editions approved in 1987, 1994, 2001, 2009, and on June 7, 2015. This edition was approved on Jan. 12, 2023. I.C. Acceptance. In May 1985, the US Environmental Protection Agency(USEPA) entered into a cooperative agreement with a consortium led by NSF International (NSF) to develop voluntary third-party consensus standards and a certification program for direct and indirect drinking water additives. Other members of the original consortium included the Water Research Foundation (formerly AwwaRF) and the Conference of State Health and Environmental Managers (COSHEM). AWWA and the Association of State Drinking Water † NSF International, 789 North Dixboro Road, Ann Arbor, MI 48105. NSF International, 789 North Dixboro Road, Ann Arbor, MI 48105. † ‡ Water Research Foundation, 6666 West Quincy Avenue, Denver, CO 80235. Water Research Foundation, 6666 West Quincy Avenue, Denver, CO 80235. ‡ In the United States, authority to regulate products for use in, or in contact with, drinking water rests with individual states. Local agencies may choose to impose requirements more stringent than those required by the state. To evaluate the health effects of products and drinking water additives from such products, state and local agencies may use various references, including § Persons outside the United States should contact the appropriate authority having jurisdiction. Persons outside the United States should contact the appropriate authority having jurisdiction. § |
| 8 | 1.Specific policies of the state or local agency. 2.Four standards developed under the direction of NSF: NSF/ANSI/CAN 60,Drinking Water Treatment Chemicals—Health Effects; NSF/ANSI/CAN 61, Drinking Water System Components—Health Effects; NSF/ANSI/CAN 372, Drinking Water System Components—Lead Content; and NSF/ANSI/CAN 600, Health Effects Evaluation and Criteria for Chemicals in Drinking Water. 3.Other references, including AWWA standards, Food Chemicals Codex, WaterChemicals Codex, and other standards considered appropriate by the state or local agency. ¶ Both publications are available from National Academies Press, 500 Fifth Street, NW, Washington, DC 20001. Both publications are available from National Academies Press, 500 Fifth Street, NW, Washington, DC 20001. ¶ Various certification organizations may be involved in certifying products in accordance with NSF/ANSI/CAN 61. Individual states or local agencies have authority to accept or accredit certification organizations within their jurisdictions. Accreditation of certification organizations may vary from jurisdiction to jurisdiction. NSF/ANSI/CAN 600 (which formerly appeared in NSF/ANSI/CAN 60 and 61 as Annex A, “Toxicology Review and Evaluation Procedures”) does not stipulate a maximum allowable level (MAL) of a contaminant for substances not regulated by a USEPA final maximum contaminant level (MCL). The MALs of an unspecified list of “unregulated contaminants” are based on toxicity testing guidelines (noncarcinogens) and risk characterization methodology (carcinogens). Use of NSF/ANSI/CAN 600 procedures may not always be identical, d ANSI/AWWA C509 does not address additives requirements. Thus, users of this standard should consult the appropriate state or local agency having jurisdiction in order to 1.Determine additives requirements including applicable standards. 2.Determine the status of certifications by parties offering to certify productsfor contact with, or treatment of, drinking water. 3.Determine current information on product certification. Some jurisdictions (including California, Maryland, Vermont, and Louisiana) call for reduced lead limits for materials in contact with potable water. Various third-party certifiers have been assessing products against these lead content criteria, and an ANSI-approved national standard, NSF/ANSI/CAN 372, Drinking Water System Components—Lead Content, was published in 2010. On Jan. 4, 2011, legislation was signed revising the definition for “lead free” within the Safe Drinking Water Act (SDWA) as it pertains |
| 9 | II.Special Issues. II.A. Chlorine and Chloramine Degradation of Elastomers. The selectionof materials is critical for water service and distribution piping in locations where there is a possibility that elastomers will be in contact with chlorine or chloramines. Documented research has shown that elastomers such as gaskets, seals, valve seats, and encapsulations may be degraded when exposed to chlorine or chloramines. The impact of degradation is a function of the type of elastomeric material, chemical concentration, contact III.Use of This Standard. It is the responsibility of the user of an AWWAstandard to determine that the products described in that standard are suitable for use in the particular application being considered. III.A. Purchaser Options and Alternatives. The following items should beprovided by the purchaser: 1.Standard used—that is, ANSI/AWWA C509, Resilient-Seated Gate Valvesfor Water Supply Service, of latest revision. 2.Whether compliance with NSF/ANSI/CAN 372, Drinking Water SystemComponents—Lead Content, or an alternative lead content criterion, is required. 3.Whether the purchaser requires that the cast ferrous valve components bemade of ductile iron. 4.Quantity required. 5.Special packaging for shipment as may be required for protection of coatings. 6.Whether the pH level of the water is less than 6.5 or greater than 8.5. 7.Size and type of valve, NRS or OS&Y (Sec. 1.1). 8.Whether the valve will be used in a corrosive environment (Sec. 1.1.4)determined by methods described in AWWA Manual M27. 9.Catalog data, net weight, and assembly drawings to be provided by themanufacturer (Sec. 4.1), if required. |
| 10 | 10.Details of federal, state, provincial, territorial, and local requirements(Sec. 4.2.1). 11.If test records of valve component materials are required (Sec. 4.2.4.2). 12.Whether the valve will be subjected to water that reacts chemically withmaterials used in these valves. Consultation with the manufacturer is advised to determine the suitability in cases of doubt (Sec. 4.2.4.5.5). 13.Other coating requirements (Sec. 4.2.4.11) and whether coating (Sec. 4.5.2)shall be NSF/ANSI/CAN 61 approved. 14.Cutter diameter must be specified for tapping valves (Sec. 4.3.3.3.2). Note: Tapping machine shell-cutters are made in either full size (outside diameter [OD] is full nominal size) or undersize (OD is less than full nominal size, i.e., usually ½ in. (13 mm) less [MSS SP-113]). The purchaser should specify the size of the shell-cutter that the valve must accept. 15.Whether valves 54 in. (1,350 mm) and larger shall have a reduced or full-sizewaterway (Sec. 4.3.3.2). 16.Type of valve ends—flanged, including dimensions (Sec. 4.4.1.4.1, No. 2),spot facing (Sec. 4.4.1.4.1, No. 3), straddled bolt holes (Sec. 4.4.1.4.1, No. 5), mechanical joint (Sec. 4.4.1.4.2), push-on joint (Sec. 4.4.1.4.3), tapping valve flange (Sec. 4.4.1.4.4), and end flange requirements for tapping valves (Sec. 4.4.1.4.4). 17.Whether bolting material with physical and chemical properties other thanASTM A307 is required (Sec. 4.4.4). It is recommended that the purchaser verify with the supplier the appropriateness of any alternative bolting materials required. What alternative, if any, is desired in the type of rustproofing for bolts and nuts (Sec. 4.4.4.1). 18.Type of stem seal for NRS valves (Sec. 4.4.6.1) and for OS&Y valves(Sec. 4.4.6.2). 19.Packing material requirements (Sec. 4.4.6.2.1). 20.Whether the valve is handwheel or wrench-nut operated and the direction inwhich the handwheel or wrench nut shall turn to open (Sec. 4.4.7). 21.Detailed description of wrench nut, if not in accordance with Sec. 4.4.7.2. 22.Whether gearing is required (Sec. 4.4.8). 23.Gear material requirements (Sec. 4.4.8.1). 24.If gear casing is required (Sec. 4.4.8.2). 25.If position indicators are required (Sec. 4.4.8.3). 26.Whether records of tests specified in Sec. 5 are to be provided. 27.Special markings (Sec. 6.1.1.1.1), if required. 28.Affidavit of compliance (Sec. 6.3), if required. |
| 11 | III.B. Modification to Standard. Any modification of the provisions, definitions,or terminology in this standard must be provided by the purchaser. IV.Major Revisions. Major changes made to the standard in this revisioninclude the following: 1.Updated Sec. I.C., Acceptance, in the foreword with the latest StandardsCouncil language reflecting the addition of reference to NSF/ANSI/CAN 372 and 600. 2.The scope of the standard was revised to include gate valve sizes 42–72 in.(1,050–1,800 mm). 3.Definitions were added to Sec. 3 for potable water, reclaimed water, reducedwaterway, and wastewater. 4.Updated Sec. 4.2.1, General, and Sec. 4.2.2, Permeation, with the latestStandards Council boilerplate language. 5.The allowable dezincification depth for copper alloys was increased from25 microns to 100 microns in Sec. 4.2.4.5.5. Span 6.Liquid epoxy and fusion bonded epoxy coatings were added as allowablecoatings to Sec. 4.2.4.11, Coatings. 7.Sec. 4.3.3, Size of Waterway, was revised to require valves sizes 48 in(1,200 mm) and smaller to have a full waterway and added in a new Sec. 4.3.3.2 providing requirements for reduced and full waterways for valves 54 in. (1,400 mm) and larger. 8.Table 2, Minimum full waterway sizes, was revised to include valves sizes42–72 in. (1,050–1,800 mm) and added requirements for minimum reduced waterway diameters for sizes 54–72 in. (1,350–1,800 mm). 9.Tables 3, 4, 5, 8, and 11 were revised to include valves sizes 42–72 in.(1,050–1,800 mm). 10.Tables 8 and 9 were revised to include valves sizes 42–72 in. (1,050–1,800 mm)and requirements for reduced and full waterways for these sizes. 11.Sec. 4.4.1.4.4, Tapping Valve Ends (No. 1), was revised to include sizes upto 60 in. (1,500 mm). 12.A new Sec. 4.4.7.1, Legible Writing, was added to address marking onwrench nuts and handwheels. 13.A new Appendix B was added on valve bypasses. |
| 12 | V.Comments. If you have any comments or questions about this standard,please call AWWA Engineering and Technical Services at 303.794.7711; write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098; or email at [email protected]. |
| 13 | C509-23 C509-23 ANSI/AWWA (Revision of ANSI/AWWA C509-15) AWWA Standard AWWA Standard Resilient-Seated Gate Valves for Water Supply Service SECTION 1: GENERAL Sec. 1.1 Scope This standard describes iron-body resilient-seated gate valves with nonrising stems (NRS) and outside screw-and-yoke (OS&Y) rising stems, including tapping gate valves, for water supply service having a temperature range of 33–125°F (0.6–52°C). 1.1.1 Velocity. These valves are intended for applications where fluid velocity does not exceed 16 ft/s (4.9 m/s) when the valve is in the full-open position. 1.1.2 Sizes. Gate valves described by this standard are 3–72 in. (75–1,800 mm) nominal pipe size (NPS). 1.1.3 Valve pressure rating. The minimum design working water pressure shall be 200 psig (1,380 kPa [gauge]) for 3–12 in. (75–300 mm) sizes and 150 psig (1,034 kPa [gauge]) for 14–72 in. (350–1,800 mm) sizes. 1.1.4 Conditions and materials not covered. This standard is not intended to describe special conditions of gate valve installation or operation, such as built-in power drive, installation in unusually corrosive soil, conveyance of unusually corrosive water, excessive water hammer, frequent operation (as in filter service), or operation in a throttled position. These conditions are beyond the intended scope of this standard and require special consideration in design and construction. |
| 14 | 1.1.5 Joint accessories. Joint accessories for end connections, such as bolts, gaskets, glands, and follower rings, are not described in this standard. Sec. 1.2 Purpose The purpose of this standard is to provide the minimum requirements for resilient-seated gate valves for water supply service, including application, materials, design, testing, inspection, rejection, marking, and shipping. Sec. 1.3 Application This standard can be referenced in specifications for purchasing and receiving resilient-seated gate valves for water supply service. 1.3.1 Stipulations. The stipulations of this standard apply when this document has been referenced and then only to resilient-seated gate valves for water supply service. 1.3.2 Compatibility. The valves encompassed by this standard require considerations for compatibility with the material being conveyed from both chemical and physical perspectives. Wastewater implies a lack of control over its chemical and physical composition. Valves in compliance with this standard may be suitable for wastewater applications; however, compliance does not ensure manufacturer approval of a specific valve in wastewater applications. Suitability for a specific valve should be determined by an SECTION 2: REFERENCES This standard references the following documents. In their latest editions, they form a part of this standard to the extent specified within the standard. In any case of conflict, the requirements of this standard shall prevail. ANSI*/AWWA C110/A21.10—Ductile-Iron and Gray-Iron Fittings. * American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. * American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036. ANSI/AWWA C111/A21.11—Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings. ANSI/AWWA C207—Steel Pipe Flanges for Waterworks Service, Sizes 4 In. Through 144 In. (100 mm Through 3,600 mm). ANSI/AWWA C550—Protective Interior Coatings for Valves and Hydrants. |
| 15 | ANSI/AWWA C600—Installation of Ductile-Iron Mains and Their Appurtenances. ANSI/SAE AS568A—Aerospace Size Standard for O-Rings. † SAE International, 400 Commonwealth Drive, Warrendale, PA 15096. SAE International, 400 Commonwealth Drive, Warrendale, PA 15096. † ASME B16.1—Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250. ‡ ASME, Two Park Avenue, New York, NY 10016. ASME, Two Park Avenue, New York, NY 10016. ‡ ASME B16.10—Face-to-Face and End-to-End Dimensions of Valves. ASME B18.2.1—Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag Screws (Inch Series). ASME B18.2.3.1M—Metric Hex Cap Screws. ASME B18.3—Socket Cap, Shoulder, Set Screws, and Hex Keys (Inch Series). ASME B18.3.1M—Socket Head Cap Screws (Metric Series). ASTM A27/A27M—Standard Specification for Steel Castings, Carbon, for General Application. § ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428. ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428. § ASTM A126—Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe Fittings. ASTM A153/A153M—Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware. ASTM A276/A276M—Standard Specification for Stainless Steel Bars and Shapes. ASTM A307—Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60,000 PSI Tensile Strength. ASTM A380/A380M—Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems. ASTM A395/A395M—Standard Specification for Ferritic Ductile Iron Pressure-Retaining Castings for Use at Elevated Temperatures. ASTM A473—Standard Specification for Stainless Steel Forgings. ASTM A536—Standard Specification for Ductile Iron Castings. ASTM A582/A582M—Standard Specification for Free-Machining Stainless Steel Bars. ASTM A743/A743M—Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application. ASTM B16/B16M—Standard Specification for Free-Cutting Brass Rod, Bar, and Shapes for Use in Screw Machines. |
| 16 | ASTM B62—Standard Specification for Composition Bronze or Ounce Metal Castings. ASTM B98/B98M—Standard Specification for Copper-Silicon Alloy Rod, Bar, and Shapes. ASTM B124/B124M—Standard Specification for Copper and Copper Alloy Forging Rod, Bar, and Shapes. ASTM B138/B138M—Standard Specification for Manganese Bronze Rod, Bar, and Shapes. ASTM B148—Standard Specification for Aluminum-Bronze Sand Castings. ASTM B154—Standard Test Method for Mercurous Nitrate Test for Copper Alloys. ASTM B283/B283M—Standard Specification for Copper and Copper-Alloy Die Forgings (Hot-Pressed). ASTM B584—Standard Specification for Copper Alloy Sand Castings for General Applications. ASTM B633—Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel. ASTM B763/B763M—Standard Specification for Copper Alloy Sand Castings for Valve Applications. ASTM B824—Standard Specification for General Requirements for Copper Alloy Castings. ASTM D395—Standard Test Methods for Rubber Property—Compression Set. ASTM D429—Standard Test Methods for Rubber Property—Adhesion to Rigid Substrates. ASTM D471—Standard Test Method for Rubber Property—Effect of Liquids. ASTM D1149—Standard Test Methods for Rubber Deterioration—Cracking in an Ozone Controlled Environment. ASTM D2000—Standard Classification System for Rubber Products in Automotive Applications. ASTM DS56/SAE HS-1086. 2012. Metals and Alloys in the Unified Numbering System. AWWA Manual M27—External Corrosion Control for Infrastructure Sustainability. |
| 17 | ISO 6509—Corrosion of Metals and Alloys—Determination of Dezincification Resistance of Brass. ¶ International Organization for Standardization, ISO Central Secretariat, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Geneva, Switzerland. International Organization for Standardization, ISO Central Secretariat, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Geneva, Switzerland. ¶ MIL-P-24752—Military Specification: Packing Material, Flax or Hemp. MSS** SP-9—Spot Facing for Bronze, Iron, and Steel Flanges. ** Manufacturers Standardization Society of the Valve and Fittings Industry, 127 Park Street, NE, Vienna, VA 22180. ** Manufacturers Standardization Society of the Valve and Fittings Industry, 127 Park Street, NE, Vienna, VA 22180. MSS SP-60—Connecting Flange Joints Between Tapping Sleeves and Tapping Valves. MSS SP-113—Connecting Joints Between Tapping Machines and Tapping Valves. NSF/ANSI/CAN 61—Drinking Water System Components—Health Effects. NSF/ANSI/CAN 372—Drinking Water System Components—Lead Content. SECTION 3: DEFINITIONS The following definitions shall apply in this standard: 1. Antiseize compound: A compound that aids in nondestructive assembly and disassembly of threaded components. 2. Cosmetic defect: Blemishes that have no effect on the ability of the component to meet the structural design and production test requirements of this standard. Should the activities of plugging, welding, grinding, or repairing of the blemish cause the component to fail these requirements, the blemish may not be considered a cosmetic defect. 3. Flanged joint: The flanged and bolted joint as described in ANSI/AWWA C110/A21.10 or ASME B16.1 Class 125 or Sec. 4.4.1.4.1 of this standard. 4. Full waterway: The waterway through the entire length of the valve in the full-open position that provides an unobstructed cylindrical flow path. The diameter of the flow path is equal to or larger than the nominal valve size. 5. Manufacturer: The party that manufactures, fabricates, or produces materials or products. 6. Mechanical joint: The gasketed and bolted joint as described in ANSI/AWWA C110/A21.10 or ANSI/AWWA C111/A21.11. |
| 18 | 7. Nominal pipe size (NPS): A size identification number, not necessarily the actual dimension that approximates the diameter of pipe. 8. Nominal valve size: The size of valve expressed in inches or millimeters as the integer value of the nominal pipe size (NPS) designation with which the end connection of the valve is intended to be used. 9. Potable water: Water that is safe and satisfactory for drinking and cooking. 10. Purchaser: The person, company, or organization that purchases any materials or work to be performed. 11. Push-on joint: The single rubber-gasket joint as described in ANSI/AWWA C111/A21.11. 12. Reclaimed water: Wastewater that becomes suitable for beneficial use as a result of treatment. 13. Reduced waterway: The waterway through the valve in the full-open position that provides a cross-sectional area of flow at any location that is less than the area of a circle having a diameter equal to the nominal valve size. 14. Structural defect: Flaws that cause the component to fail the structural design or test requirements of this standard. These include but are not limited to imperfections that result in leakage through the walls of a casting, failure to meet minimum wall thickness requirement, or failure to meet production tests. 15. Supplier: The party that supplies materials or services. A supplier may or may not be the manufacturer. 16. Tapping valve: A special gate valve designed with end connections and an unobstructed waterway to provide proper alignment and positioning of a tapping sleeve, valve, and machine for tapping pipe dry or under pressure. 17. Wastewater: A combination of the liquid and water-carried waste from residences, commercial buildings, industrial plants, and institutions, together with any groundwater, surface water, and stormwater that may be present. SECTION 4: REQUIREMENTS Sec. 4.1 Data to Be Supplied by the Manufacturer When required in the purchase documents, the manufacturer shall provide the following information when supplying iron-body resilient-seated gate valves. |
| 19 | 4.1.1 Catalog data. The manufacturer shall supply catalog data, including illustrations and a parts list that identify the materials used for various parts. 4.1.1.1 Catalog detail. The information shall be in sufficient detail to serve as a guide in the assembly and disassembly of the valve and for ordering repair parts. 4.1.2 Weight information. Manufacturer shall provide a statement of the net assembled weight for each size of valve exclusive of joint accessories. 4.1.3 Assembly drawings. Manufacturer shall submit to the purchaser one set of drawings showing the principal dimensions, construction details, and materials used for valve parts. 4.1.3.1 Drawing review. Work shall be done and valves shall be provided in accordance with these drawings after the drawings have been reviewed and accepted by the purchaser. Sec. 4.2 Materials Materials used in valves produced according to this standard shall conform to the requirements stipulated in the following sections. 4.2.1 General. Materials shall comply with the requirements of the Safe Drinking Water Act and applicable federal, state, provincial, territorial, or other authoritative regulations for potable water and reclaimed water systems. 4.2.2 Permeation. The selection of materials is critical for potable water, wastewater, and reclaimed water service and distribution piping systems in locations where there is likelihood the piping system will be exposed to significant concentrations of pollutants composed of low-molecular-weight petroleum products or organic solvents or their vapors. Research has documented that piping system materials such as polyethylene, polybutylene, and polyvinyl chloride, and asbestos cement and elastomers used in ga 4.2.3 Dissimilar metals. In the presence of an electrolyte, direct contact between metals of dissimilar corrosion resistance may result in galvanic corrosion of the more active, less corrosion-resistant material. 4.2.3.1 Selection of materials. When dissimilar metals must be used for internal parts, the rate of corrosion shall be reduced as much as practical through the selection of materials that exhibit similar resistance to corrosion, by placing a dielectric material between metals, or by applying a dielectric coating. |
| 20 | 4.2.3.2 Water quality or premature failure. When contact between dissimilar metals cannot be avoided, the assembly shall be designed so that the resulting corrosion will be minimized and will not adversely affect water quality or result in malfunctioning or premature failure of the assembly. 4.2.4 Physical and chemical properties. The requirements of AWWA, ANSI, ASTM, or other standards referenced in this text shall govern the physical and chemical characteristics of the valve components. 4.2.4.1 Testing. Whenever valve components are to be made in conformance with AWWA, ANSI, ASTM, or other standards that include test requirements or testing procedures, the manufacturer or supplier shall comply with those procedures. 4.2.4.2 Test records. Records of tests performed shall, if required by the purchase documents, be made available to the purchaser. 4.2.4.3 Gray iron. Gray iron shall conform to or exceed the requirements of ASTM A126 Class B. 4.2.4.4 Ductile iron. Ductile iron shall conform to the requirements of ASTM A395/A395M or ASTM A536. In addition, ductile iron shall have a minimum yield strength of 45,000 psi and minimum elongation of 5 percent. 4.2.4.5 Copper alloys. Copper alloys used in valves shall comply with the following: 4.2.4.5.1 Copper alloy valve components shall be made to ASTM-recognized alloy specifications with unified numbering system (UNS)* for metals and alloys designations. * Joint publication of ASTM and SAE (ASTM DS56/SAE HS-1086, 2012). * Joint publication of ASTM and SAE (ASTM DS56/SAE HS-1086, 2012). 4.2.4.5.2 Copper alloys are not limited to those specified in this standard. 4.2.4.5.3 Copper alloys must meet the performance requirements of this standard including minimum yield strength, chemical requirements, and corrosion resistance. 4.2.4.5.4 Any copper alloy used in the cold-worked condition shall be capable of passing the mercurous nitrate test in accordance with ASTM B154 to minimize susceptibility to stress corrosion. 4.2.4.5.5 Waters in some areas have been shown to promote corrosion in the form of dezincification or dealuminization of copper alloys. The manufacturer should be notified if this condition exists. Copper alloys that contain more than 16 percent zinc shall not be used in these waters unless specimens of the alloy tested in accordance with ISO 6509 exhibit dezincification depth of less than 100 µm. If aluminum bronze is used, the alloys shall be inhibited against dealuminization. |
| 21 | 4.2.4.5.6 Copper alloys that contain more than 16 percent zinc shall not contain less than 57 percent copper. 4.2.4.5.7 Copper alloys that contain 16 percent or less zinc shall not contain less than 79 percent copper. 4.2.4.5.8 Valve components manufactured from some grades of manganese, bronze, or some other materials are subject to stress corrosion. The manufacturer shall design the valve and select materials to minimize stress corrosion. 4.2.4.5.9 Copper alloys that contact drinking water shall comply with the Safe Drinking Water Act. 4.2.4.6 Carbon steel. Carbon steel castings, when used, shall conform to the requirements of ASTM A27/A27M Grade U-60-30 or equivalent. 4.2.4.7 Stainless steel. Stainless steel used in valves shall comply with the following: 4.2.4.7.1 The chemical composition of stainless-steel valve components shall contain not less than 15 percent chromium or more than 0.25 percent carbon and shall be processed to reduce the formation of chromium carbides. 4.2.4.7.2 Stainless-steel valve components shall be made to ASTM-recognized alloy specifications with metal and alloys in the UNS. 4.2.4.7.3 Stainless-steel alloys are not limited to those specified herein. 4.2.4.7.4 Stainless-steel alloys must meet the performance requirements of this standard including the minimum yield strength and chemical requirements. 4.2.4.7.5 After final forming and machining, exogenous iron shall be removed from finished stainless-steel components that come in contact with water or those components shall be passivated in accordance with ASTM A380/A380M. 4.2.4.7.6 Other stainless-steel components shall be cleaned and descaled in accordance with the manufacturer’s requirements. 4.2.4.8 Gaskets. Gasket material shall be made of inorganic mineral fiber, natural or synthetic rubber composition, or paper that is free from corrosive ingredients. 4.2.4.9 O-rings. O-rings or other suitable elastomeric seals may be used. 4.2.4.9.1 O-rings shall meet the requirements of ASTM D2000 and have physical properties suitable for the application. |
| 22 | 4.2.4.10 Watertightness. Gaskets, O-rings, or other suitable elastomeric seals shall be used on flanged joints intended to be watertight. 4.2.4.11 Coatings. Unless otherwise specified by the purchaser, valve coatings, as required in Sec. 4.5.2, shall be water-based enamel coating, black asphalt coating, liquid epoxy coating, or fusion bonded epoxy coating except as required by Sec. 4.4.1.3. 4.2.4.12 Elastomers. Elastomers shall comply with the following: 1. Rubber seats shall be resistant to microbiological attack, copper poisoning, and ozone attack. 2. Rubber-seat compounds shall contain no more than 8 ppm of copper ion and shall include copper inhibitors to prevent copper degradation of the rubber material. 3. Rubber-seat compounds shall be capable of withstanding an ozone resistance test when tested in accordance with ASTM D1149. The tests shall be conducted on unstressed samples for 70 h at 104°F (40°C) with an ozone concentration of 500 ppb without visible cracking in the surfaces of the test samples after a test. 4. Rubber-seat compounds shall have a maximum compression set value of 20 percent when tested in accordance with ASTM D395 Method B for 22 h at 158°F (70°C). 5. Rubber-seat compounds shall contain no more than 1.5 parts of wax per 100 parts of rubber hydrocarbon and shall have less than 2 percent volume increase when tested in accordance with ASTM D471 after being immersed in distilled water at 73.4°F±2°F (23°C±1°C) for 70 h. Reclaimed rubber shall not be used. 6. Rubber-seat compounds shall be free of vegetable oils, vegetable oil derivatives, animal fats, and animal oils. Sec. 4.3 General Design 4.3.1 Structural design. Valve parts shall be designed to withstand, without being structurally or otherwise damaged, (1) an internal test pressure of twice the rated design working pressure of the valve; and (2) the full-rated internal working pressure when the closure member is cycled once from a fully open to a fully closed position against the full-rated unbalanced working water pressure. 4.3.2 Stem torque. The valve assembly and mechanism shall be capable of withstanding a design valve stem input torque as shown in Table 1. 4.3.3 Size of waterway. 4.3.3.1 Valves 48 in. (1,200 mm) and smaller shall have a full waterway, the minimum diameter of which is in accordance with Table 2. |
| 23 | 4.3.3.2 Valves 54 in. (1,350 mm) and larger shall have either a full waterway, the minimum diameter of which is in accordance with Table 2, or a reduced waterway, the minimum diameter of which is in accordance with Table 2. 4.3.3.3 Pigging and tapping. 4.3.3.3.1 For pipelines to be cleaned by pigging and for tapping valves, the size of the waterway shall include appropriate clearance for the diameter of the pig or the diameter of the tapping machine cutter recommended by the valve manufacturer. Table 1 Design torque Table 1 Design torque Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Design Torque Design Torque in. in. in. (mm)* (mm)* ft-lb ft-lb (Nm) (Nm) † 3–4 3–4 3–4 3–4 (75–100) (75–100) 200 200 (270) (270) 6–16 6–16 6–16 (150–400) (150–400) 300 300 (405) (405) Larger than 16 Larger than 16 Larger than 16 (400) (400) Consult manufacturer Consult manufacturer * Nominal valve size mm is soft conversion (nominal in. size 25). × Torque Nm is rounded to nearest 5 Nm (ft-lb 1.356). † × Table 2 Minimum full waterway sizes Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Minimum Full Waterway Diameter Minimum Full Waterway Diameter Minimum Reduced Waterway Diameter Minimum Reduced Waterway Diameter Nominal Valve Size Nominal Valve Size Minimum Full Waterway Diameter Minimum Full Waterway Diameter Minimum Reduced Waterway Diameter Minimum Reduced Waterway Diameter in. in. in. in. in. in. in. mm mm mm mm mm mm 3 3 3 3 3.00 3.00 – – 75 75 76 76 – – 4 4 4 4.00 4.00 – – 100 100 102 102 – – 6 6 6 6.00 6.00 – – 150 150 152 152 – – 8 8 8 8.00 8.00 – – 200 200 203 203 – – 10 10 10 10.00 10.00 – – 250 250 254 254 – – 12 12 12 12.00 12.00 – – 300 300 305 305 – – 14 14 14 14.00 14.00 – – 350 350 356 356 – – 16 16 16 16.00 16.00 – – 400 400 406 406 – – 18 18 18 18.00 18.00 – – 450 450 457 457 – – 20 20 20 20.00 20.00 – – 500 500 508 508 – – 24 24 24 24.00 24.00 – – 600 600 610 610 – – 30 30 30 30.00 30.00 – – 750 750 762 762 – – 36 36 36 36.00 36.00 – – 900 900 914 914 – – 42 42 42 42.00 42.00 – – 1,050 1,050 1,067 1,067 – – 48 48 48 48.00 48.00 – – 1,200 1,200 1,219 1,219 – – 54 54 54 54.00 54.00 48.00 48.00 1,350 1,350 1,372 1,372 1,219 1,219 60 60 60 60.00 60.00 54.00 54.00 1,500 1,500 1,524 1,524 1,372 1,372 66 66 66 66.00 66.00 60.00 60.00 1,650 1,650 1,676 1,676 1,524 1,524 72 72 72 72.00 72.00 66.00 66.00 1,800 1,800 1,829 1,829 1,676 1,676 |
| 24 | 4.3.3.3.2 Since some tapping valves may require an undersized cutter, which is smaller than the nominal diameter of the valve, the valve manufacturer shall publish the maximum size cutter for each valve size. Sec. 4.4 Detailed Design 4.4.1 Body and bonnet. 4.4.1.1 Material. The body and bonnet shall be made of gray iron or ductile iron. 4.4.1.2 Shell thickness. Shell thickness at no point shall be more than 12.5 percent thinner than the minimum metal thickness stated in Table 3. 4.4.1.2.1 No continuous area of deficient thickness shall exceed 12.5 percent of the pressure-containing shell area of the casting. 4.4.1.3 Body seating surfaces. Resilient seats shall seal against a corrosion-resistant surface. Table 3 Minimum thickness of body and bonnet Table 3 Minimum thickness of body and bonnet Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Minimum Metal Thickness Minimum Metal Thickness in. in. in. (mm)* (mm)* in. in. (mm) (mm) † 3 3 3 3 (75) (75) 0.37 0.37 (9.4) (9.4) 4 4 4 (100) (100) 0.40 0.40 (10.2) (10.2) 6 6 6 (150) (150) 0.43 0.43 (10.9) (10.9) 8 8 8 (200) (200) 0.50 0.50 (12.7) (12.7) 10 10 10 (250) (250) 0.63 0.63 (16.0) (16.0) 12 12 12 (300) (300) 0.68 0.68 (17.3) (17.3) 14 14 14 (350) (350) 0.75 0.75 (19.1) (19.1) 16 16 16 (400) (400) 0.85 0.85 (21.6) (21.6) 18 18 18 (450) (450) 0.94 0.94 (23.9) (23.9) 20 20 20 (500) (500) 0.97 0.97 (24.6) (24.6) 24 24 24 (600) (600) 1.08 1.08 (27.4) (27.4) 30 30 30 (750) (750) 1.39 1.39 (35.3) (35.3) 36 36 36 (900) (900) 1.54 1.54 (39.1) (39.1) 42 42 42 (1,050) (1,050) 1.58 1.58 (40.1) (40.1) 48 48 48 (1,200) (1,200) 1.73 1.73 (43.9) (43.9) 54 54 54 (1,350) (1,350) 2.20 2.20 (55.9) (55.9) 60 60 60 (1,500) (1,500) 2.45 2.45 (62.2) (62.2) 66 66 66 (1,650) (1,650) 2.69 2.69 (68.3) (68.3) 72 72 72 (1,800) (1,800) 2.93 2.93 (74.4) (74.4) * Nominal valve size mm is soft conversion (nominal in. size 25). × Minimum metal thickness mm is hard conversion (in. 25.4). † × |
| 25 | 4.4.1.3.1 The surface may be either metallic or nonmetallic, applied in a manner to withstand the action of the line fluids and the operation of the sealing gate during long-term service. 4.4.1.3.2 A metallic surface shall have a corrosion resistance equivalent to or better than that of bronze. 4.4.1.3.3 A nonmetallic surface shall be epoxy coating. 4.4.1.4 Valve end connections. Except as agreed on by the purchaser and supplier, valve end connections shall conform to the requirements of one of the following end connection types. 4.4.1.4.1 Flanged ends: 1. Thickness a. The thickness for gray-iron end flanges may not be less than specified in ASME B16.1 or ANSI/AWWA C110/A21.10. b. Thickness of ductile-iron end flanges may be less than specified in ASME B16.1 or ANSI/AWWA C110/A21.10 but not less than shown in Table 4. Table 4 Minimum thickness for ductile-iron connecting end flanges Table 4 Minimum thickness for ductile-iron connecting end flanges Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Flange Thickness Flange Thickness in. in. in. (mm)* (mm)* in. in. (mm) (mm) † 4 4 4 4 (100) (100) ¾ ¾ (19.1) (19.1) 6 6 6 (150) (150) ¾ ¾ (19.1) (19.1) 8 8 8 (200) (200) (22.2) (22.2) 10 10 10 (250) (250) 15/16 15/16 (23.8) (23.8) 12 12 12 (300) (300) 1 1 (25.4) (25.4) 14 14 14 (350) (350) 1 1 (25.4) (25.4) 16 16 16 (400) (400) 1 1 (25.4) (25.4) 18 18 18 (450) (450) 1 1 (25.4) (25.4) 20 20 20 (500) (500) 11/8 11/8 (28.6) (28.6) 24 24 24 (600) (600) 13/16 13/16 (30.1) (30.1) 30 30 30 (750) (750) 13/8 13/8 (34.9) (34.9) 36 36 36 (900) (900) 1¾ 1¾ (44.5) (44.5) 42 42 42 (1,050) (1,050) 2 2 (50.8) (50.8) 48 48 48 (1,200) (1,200) 21/8 21/8 (54.0) (54.0) 54 54 54 (1,350) (1,350) 27/16 27/16 (61.9) (61.9) 60 60 60 (1,500) (1,500) 2½ 2½ (63.5) (63.5) 66 66 66 (1,650) (1,650) 2¾ 2¾ (69.9) (69.9) 72 72 72 (1,800) (1,800) 3 3 (76.2) (76.2) * Nominal valve size mm is soft conversion (nominal in. size × 25). Flange thickness mm is hard conversion (in. × 25.4). † |
| 26 | 2. Other dimensions and drilling of end flanges of flanged valves shall conform to ASME B16.1 Class 125, ANSI/AWWA C207, or ANSI/AWWA C110/A21.10 except as modified by the purchase documents. 3. Unless spot facing is required by the purchase documents, the bolt holes of the end flanges shall not be spot faced except: a. When the thickness at any point within the spot-face area, as defined in MSS SP-9, exceeds the required minimum flange thickness by more than indicated in Table 5 or if the flange is not sufficiently flat. b. When the bearing surfaces for bolting, as defined as the minimum spot-face diameter according to bolt size in MSS SP-9, are not parallel within 3 degrees of the flange face. c. If the foregoing requirements are not met, either spot facing or backfacing shall be used to meet the requirements. 4. When required, spot facing shall be done in accordance with MSS SP-9. 5. Bolt holes shall straddle the vertical centerline of the valve, unless otherwise specified by the purchaser. 6. The laying lengths of flanged valves 12 in. (300 mm) and smaller shall conform to the requirements for double-disc gate valves listed in Table 1 of ASME B16.10. 4.4.1.4.2 Mechanical-joint ends: 1. Mechanical-joint bell dimensions shall conform to ANSI/AWWA C111/A21.11. 2. Slots with the same width as the diameter of the bolt holes may be provided instead of holes in the bell flange where the valve body and bonnet interfere with the joint assembly. 4.4.1.4.3 Push-on joints shall conform to the requirements of ANSI/AWWA C111/A21.11. Table 5 Excess flange thickness Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Excess Thickness Excess Thickness in. in. in. (mm)* (mm)* in. in. (mm) (mm) † 3–12 3–12 3–12 3–12 (75–300) (75–300) (3.2) (3.2) 14–24 14–24 14–24 (350–600) (350–600) 3/16 3/16 (4.8) (4.8) 30–54 30–54 30–54 (750–1,350) (750–1,350) ¼ ¼ (6.4) (6.4) 60-72 60-72 60-72 (1,500–1,800) (1,500–1,800) (9.5) (9.5) * Nominal valve size mm is soft conversion (nominal in. size × 25). Excess thickness mm is hard conversion (in. × 25.4). † |
| 27 | 4.4.1.4.4 Tapping valve ends: 1. The end flange of a tapping valve that forms a joint with the tapping sleeve shall conform to the dimensions of MSS SP-60 in sizes 3-in. (75-mm) through 60-in. (1,500-mm) NPS. For larger sizes, joint dimensions shall be as agreed to by the purchaser and supplier. 2. The connecting flange of the tapping valve mating with the tapping machine must be parallel and concentric with the opposite flange and concentric with the waterway to provide proper alignment for the tapping operation. 3. The end flange of a tapping valve that forms a joint with the tapping machine shall conform to the dimensions of MSS SP-113. 4.4.1.5 Yokes on OS&Y valves. On OS&Y valves, the yokes on bonnets may be integral or of bolted-on construction. 4.4.1.5.1 If the yoke is not an integral part of the bonnet, it shall be made of ductile iron or gray iron. 4.4.1.5.2 The design shall be such that a hand cannot be jammed between a yoke and the handwheel. 4.4.2 Gate. The material of the gate shall be ductile iron, gray iron, or copper alloy (see Table 6 for copper alloys). 4.4.2.1 Resilient seats. Resilient seats shall be bonded or mechanically attached to the gate. 4.4.2.1.1 The proof-of-design test method used for bonding or vulcanizing shall be ASTM D429, either Method A or Method B. 4.4.2.1.2 For Method A, the minimum strength shall not be less than 250 psi (1,725 kPa). 4.4.2.1.3 For Method B, the peel strength shall not be less than 75 lb/in. (13.2 N/mm). 4.4.2.1.4 Exposed mechanical attaching devices and hardware used to retain the resilient seat shall be of a corrosion-resistant material. 4.4.3 Guides. If guiding is required to obtain shutoff, the design shall be such that corrosion in the guide area does not affect seating. 4.4.4 Bolting. Bolting materials, excluding joint accessories, shall meet the mechanical strength requirements of ASTM A307 and shall have either regular square, hexagonal, or socket heads with dimensions conforming to ASME B18.2.1, ASME B18.2.3.1M, ASME B18.3, or ASME B18.3.1M. |
| 28 | Table 6 Stem, gate, thrust collar, and stem nut copper alloys Table 6 Stem, gate, thrust collar, and stem nut copper alloys tbl_anchor Table THead TR Copper Alloy* Copper Alloy* TR ASTM Specification Number ASTM Specification Number Alloy Designation Alloy Designation TBody TR ASTM B16 ASTM B16 UNS C36000 UNS C36000 TR ASTM B138 ASTM B138 UNS C67500 UNS C67500 Stems, gates, and thrust collars Stems, gates, and thrust collars Stems, gates, and thrust collars ASTM B283 ASTM B283 UNS C67600 UNS C67600 TR ASTM B98 ASTM B98 UNS C66100 UNS C66100 UNS C86200 TR ASTM B148 ASTM B148 UNS C95200 UNS C95200 UNS C95300 UNS C95500 TR ASTM B584 ASTM B584 UNS C86200 UNS C86200 UNS C86500 † UNS C86700 † UNS C87500 UNS C87600 UNS C87610 TR ASTM B763 ASTM B763 UNS C86200 UNS C86200 UNS C86500 † UNS C86700 † UNS C99400 UNS C99500 TR ASTM B62 ASTM B62 ASTM B824 UNS C83600 UNS C83600 UNS C84400 † Stem nuts and gates Stem nuts and gates Stem nuts and gates ASTM B124 ASTM B124 UNS C37700 UNS C37700 TR ASTM B148 ASTM B148 UNS C95200 UNS C95200 UNS C95300 UNS C95500 TR ASTM B584 ASTM B584 UNS C84400 UNS C84400 † UNS C83450 UNS C86700 † UNS C87500 UNS C87610 TR ASTM B763 ASTM B763 UNS C86500 UNS C86500 † UNS C86700 † UNS C95200 UNS C95500 UNS C95800 UNS C99400 UNS C99500 * Alloys actually used or specified are not limited to those listed—see Sec. 4.2.4.5.2. Compliance with ANSI/AWWA C509 requires the manufacturer to specify minimum mechanical (yield strength) or chemical (copper and/or zinc) requirements that exceed the minimums required for this alloy by the ASTM specification(s) listed. † |
| 29 | 4.4.4.1 Corrosion resistance. Bolts, studs, and nuts shall be zinc-coated (ASTM A153/A153M or ASTM B633) or made corrosion-resistant by some other process disclosed and acceptable to the purchaser. 4.4.4.1.1 The purchaser may specify bolts, studs, and nuts made from a specified corrosion-resistant material, such as low-zinc bronze, nickel-copper alloy, or stainless steel. 4.4.4.1.2 Stainless-steel bolts and studs shall not be used on stainless-steel nuts unless the threads are coated with an antiseize compound or the fastening components are made of different alloys or some other means are used to prevent galling. 4.4.4.2 Recessed sockets. Recessed socket in bolts shall be plugged and/or sealed. 4.4.5 Stem, stem nut, and thrust collar. Copper-alloy stems, stem nuts, thrust collars, and gates shall be made from an alloy listed in Table 6. 4.4.5.1 Stainless-steel stems. Stainless-steel stems shall be made from an alloy listed in Table 7. 4.4.5.1.1 When stainless-steel stems are used, the stem, stem nut, and thrust collar materials shall be selected to prevent galling when subjected to the torques given in Table 8. 4.4.5.2 Stem yield strength. Valve stems shall have a yield strength of 20,000 psi (137,800 kPa) or greater. 4.4.5.3 Stem nuts. Stem nuts shall be made from copper alloys that have a yield strength of 14,000 psi (96,500 kPa) or greater (see Table 6). 4.4.5.4 NRS stems. The stem must have a thrust collar that shall be integral or nonintegral with the stem. Table 7 Stainless-steel valve stem alloys Table 7 Stainless-steel valve stem alloys ASTM Specification Number ASTM Specification Number ASTM Specification Number ASTM Specification Number ASTM Specification Number ASTM Specification Number Alloy Designation* Alloy Designation* ASTM A276 ASTM A276 ASTM A276 ASTM A276 UNS S30400 UNS S30400 ASTM A276 ASTM A276 ASTM A276 UNS S31600 UNS S31600 ASTM A276 ASTM A276 ASTM A276 UNS S43100 UNS S43100 ASTM A473 ASTM A473 ASTM A473 UNS S30400 UNS S30400 ASTM A473 ASTM A473 ASTM A473 UNS S31600 UNS S31600 ASTM A582 ASTM A582 ASTM A582 UNS S43020 UNS S43020 ASTM A743 ASTM A743 ASTM A743 CF8 J92600 CF8 J92600 ASTM A743 ASTM A743 ASTM A743 CF8M J92900 CF8M J92900 * Alloys actually used or specified are not limited to those listed—see Sec. 4.2.4.7. |
| 30 | 4.4.5.5 OS&Y stems. OS&Y valve stems shall be of sufficient length so as to be at least flush with the top of the stem nut after the gate is fully closed. 4.4.5.5.1 The design shall prevent any possibility of the gate leaving the stem or the stem turning during the operation of the valve. 4.4.5.6 Threads. The threads of stems and stem nuts shall be of Acme, modified Acme, stub Acme, or one-half V type. 4.4.5.6.1 Stems and stem nuts shall be threaded straight and true and shall work true and smooth throughout the lift of opening and thrust of closing the valve. 4.4.5.7 Diameter. The stem diameters and turns to open shall be as shown in Table 9. 4.4.6 Stem sealing. The sealing system shall be designed to be watertight at the rated working pressure of the valve. 4.4.6.1 NRS valves. 4.4.6.1.1 A stem-seal plate or O-ring packing plate shall be made of ductile iron or gray iron. Table 8 Proof-of-design torque Table 8 Proof-of-design torque Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Proof-of-Design Torque Proof-of-Design Torque in. in. in. (mm)* (mm)* ft-lb ft-lb (Nm) (Nm) † 3–4 3–4 3–4 3–4 (75–100) (75–100) 250 250 (340) (340) 6–12 6–12 6–12 (150–300) (150–300) 350 350 (475) (475) 14–24 14–24 14–24 (350–600) (350–600) 400 400 (545) (545) 30 30 30 (750) (750) 500 500 (680) (680) 36 36 36 (900) (900) 600 600 (815) (815) 42 42 42 (1,050) (1,050) 700 700 (950) (950) 48 48 48 (1,200) (1,200) 800 800 (1,085) (1,085) 54 54 54 ‡ (1,350) (1,350) 800 800 (1,085) (1,085) 54 54 54 (1,350) (1,350) 1,000 1,000 (1,355) (1,355) 60 60 60 ‡ (1,500) (1,500) 1,000 1,000 (1,355) (1,355) 60 60 60 (1,500) (1,500) 1,200 1,200 (1,625) (1,625) 66 66 66 ‡ (1,650) (1,650) 1,200 1,200 (1,625) (1,625) 66 66 66 (1,650) (1,650) 1,400 1,400 (1,900) (1,900) 72 72 72 ‡ (1,800) (1,800) 1,400 1,400 (1,900) (1,900) 72 72 72 (1,800) (1,800) 1,600 1,600 (2,170) (2,170) * Nominal valve size mm is soft conversion (nominal in. size × 25). Torque Nm is rounded to nearest 5 Nm (ft-lb × 1.356). † Reduced waterway ‡ |
| 31 | Table 9 Minimum diameter of stem and minimum number of turns to fully open Table 9 Minimum diameter of stem and minimum number of turns to fully open Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size NRS Valves NRS Valves OS&Y Valves OS&Y Valves TR Minimum Diameter of Stem* Minimum Diameter of Stem* Minimum Number of Turns of Stem to Fully Open Minimum Number of Turns of Stem to Fully Open Minimum Diameter of Stem Unthreaded Section and Thread OD Minimum Diameter of Stem Unthreaded Section and Thread OD † Minimum Number of Turns of Stem to Fully Open Minimum Number of Turns of Stem to Fully Open ¶ in. in. in. (mm) (mm) ‡ in. in. (mm) (mm) § in. in. (mm) (mm) § 3 3 3 3 (75) (75) 0.859 0.859 (21.82) (21.82) 9 9 ¾ ¾ (19.1) (19.1) 7 7 4 4 4 (100) (100) 0.859 0.859 (21.82) (21.82) 12 12 1 1 (25.4) (25.4) 9 9 6 6 6 (150) (150) 1.000 1.000 (25.40) (25.40) 18 18 11/8 11/8 (28.6) (28.6) 18 18 8 8 8 (200) (200) 1.000 1.000 (25.40) (25.40) 24 24 1¼ 1¼ (31.8) (31.8) 25 25 10 10 10 (250) (250) 1.125 1.125 (28.58) (28.58) 30 30 13/8 13/8 (34.9) (34.9) 31 31 12 12 12 (300) (300) 1.188 1.188 (30.18) (30.18) 36 36 13/8 13/8 (34.9) (34.9) 37 37 14 14 14 (350) (350) 1.438 1.438 (36.53) (36.53) 48 48 1½ 1½ (38.1) (38.1) 48 48 16 16 16 (400) (400) 1.438 1.438 (36.53) (36.53) 48 48 1½ 1½ (38.1) (38.1) 48 48 18 18 18 (450) (450) 1.750 1.750 (44.45) (44.45) 40 40 2 2 (50.8) (50.8) 40 40 20 20 20 (500) (500) 1.750 1.750 (44.45) (44.45) 40 40 2 2 (50.8) (50.8) 40 40 24 24 24 (600) (600) 1.969 1.969 (50.01) (50.01) 48 48 2¼ 2¼ (57.2) (57.2) 48 48 30 30 30 (750) (750) 2.188 2.188 (55.58) (55.58) 60 60 2½ 2½ (63.5) (63.5) 60 60 36 36 36 (900) (900) 2.500 2.500 (63.50) (63.50) 72 72 42 42 42 (1,050) (1,050) 2.75 2.75 (69.9) (69.9) 84 84 48 48 48 (1,200) (1,200) 3.43 3.43 (87.1) (87.1) 96 96 54** 54** 54** (1,350) (1,350) 3.43 3.43 (87.1) (87.1) 96 96 54 54 54 (1,350) (1,350) 3.63 3.63 (92.2) (92.2) 108 108 60** 60** 60** (1,500) (1,500) 3.63 3.63 (92.2) (92.2) 108 108 60 60 60 (1,500) (1,500) 3.86 3.86 (98.0) (98.0) 120 120 66** 66** 66** (1,650) (1,650) 3.86 3.86 (98.0) (98.0) 120 120 66 66 66 (1,650) (1,650) 4.16 4.16 (105.7) (105.7) 132 132 72** 72** 72** (1,800) (1,800) 4.16 4.16 (105.7) (105.7) 132 132 72 72 72 (1,800) (1,800) 4.25 4.25 (108.0) (108.0) 144 144 * The diameter of the stem at the base of the thread or at any point below that portion shaped to receive the wrench nut or gear on NRS valves or the minimum diameter of the stem unthreaded section and thread OD for OS&Y valves shall not be less than specified. Outside diameter. † Nominal valve size mm is soft conversion (nominal in. size × 25). ‡ Stem diameter mm is hard conversion (in. × 25.4). § Values shown for 6- through 12-in. nominal valve size are for single-lead threads. If a double-lead thread is used, minimum turns become 13, 17, 21, and 25 for sizes 6- through 12-in. nominal valve size inclusive. ¶ Reduced waterway ** |
| 32 | 4.4.6.1.2 Stem openings, if bushed, or stem-seal cartridges shall be of a copper alloy or a synthetic polymer with physical properties suitable for the application. 4.4.6.1.3 Stem-seal plate bolts and nuts shall conform to the requirements as specified in Sec. 4.4.4. 4.4.6.1.4 On NRS valves, the stem opening, thrust-bearing recess, and bonnet face of the stem-seal plate shall be machined or finished in a manner that will provide surfaces that are smooth and either parallel or perpendicular to the stem axis within 0.5 degrees. 4.4.6.1.5 When an O-ring or other pressure-actuated stem seal is used, the design shall incorporate at least two such seals. 4.4.6.1.6 The dimensions of the O-rings shall be in accordance with ANSI/SAE AS568A. 4.4.6.2 OS&Y valves. A stuffing box shall be provided to contain stem packing. 4.4.6.2.1 Stuffing-box packing shall be made of flax conforming to MIL-P-24752. Hemp, asbestos, or jute packing shall not be used. 4.4.6.2.2 Stuffing boxes shall have a depth not less than the diameter of the valve stem. 4.4.6.2.3 The internal diameter of the stuffing box shall be large enough to contain adequate packing to prevent leakage around the stem. 4.4.6.2.4 Stuffing boxes shall be packed properly and ready for service when valves are delivered to the purchaser. 4.4.6.2.5 Stuffing-box bolts may need to be adjusted to stop leakage at the time of installation. 4.4.6.3 Packing glands, gland followers, gland bolts, and gland-bolt nuts. The packing gland assembly shall be of solid, solid-bushed, or two-piece designs. 4.4.6.3.1 Followers may be formed as a flanged end on the gland or as a separate item. 4.4.6.3.2 Packing glands shall be made of a copper alloy, synthetic polymer, gray iron, or ductile iron. 4.4.6.3.3 If a gland follower is used, it shall be made of either ductile iron or gray iron or a copper alloy. 4.4.6.3.4 Gland bolts and nuts shall be according to Sec. 4.4.4. 4.4.6.3.5 Gland-bolt nuts shall be made of a copper alloy or stainless steel. 4.4.6.4 Stem-seal replacement. |
| 33 | 4.4.6.4.1 NRS valves shall be designed so that the seal above the stem collar can be replaced with the valve under pressure in the fully open position. 4.4.6.4.2 Design of OS&Y valves shall be such that the stuffing box can be packed when the valves are in the fully open position and under pressure. 4.4.7 Wrench nuts and handwheels. Except as shown in Sec. 4.4.8.6, wrench nuts and handwheels shall be made of gray iron or ductile iron. 4.4.7.1 Legible writing. All text, lettering, and arrows must be fully defined, uniform, and legible after manufacturer’s coatings have been applied. The text must be readable for the purposes of identifying the direction of opening, and as such it must be readable from a distance appropriate for a given application. 4.4.7.2 Nuts. Unless otherwise explicitly required by the purchase documents, the wrench nuts shall be 115/16-in. (49.2-mm) square at the top, 2-in. (50.8-mm) square at the base, and 1¾-in. (44.5 mm) high. 4.4.7.2.1 Nuts shall have a flanged base on which shall be cast an arrow at least 2-in. (50.8-mm) long showing the direction of the opening. 4.4.7.2.2 The word “OPEN” in ½-in. (12.7-mm) or larger letters shall be cast on the nut to indicate clearly the direction to turn the wrench when opening the valve. 4.4.7.3 Handwheels. Handwheels shall be of the spoke type only. Webbed or disc types are not permissible. 4.4.7.3.1 The outside diameter of handwheels shall not be less than those given in Table 10. 4.4.7.3.2 An arrow showing the direction to turn the handwheel to open the valve, with the word “OPEN” in ½-in. (12.7-mm) or larger letters in a break in the arrow shaft, shall be cast on the rim of the handwheel so as to be read easily. Table 10 Outside diameter of handwheels* Table 10 Outside diameter of handwheels* Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Minimum Diameter of Handwheel Minimum Diameter of Handwheel in. in. in. (mm) (mm) † in. in. (mm) (mm) ‡ 3 3 3 3 (75) (75) 7 7 (178) (178) 4 4 4 (100) (100) 10 10 (254) (254) 6 6 6 (150) (150) 12 12 (305) (305) 8 8 8 (200) (200) 14 14 (356) (356) 10 10 10 (250) (250) 16 16 (406) (406) 12 12 12 (300) (300) 16 16 (406) (406) * For sizes larger than 12 in. (300 mm), consult the manufacturer. Nominal valve size mm is soft conversion (nominal in. size × 25). † Handwheel diameter mm is hard conversion (in. × 25.4). ‡ |
| 34 | 4.4.7.4 Operating mechanism. NRS valves are to be supplied with wrench nuts or handwheels. OS&Y valves are to be supplied with handwheels. 4.4.7.5 Direction of opening. The standard direction of opening is counterclockwise as viewed from the top. Valves opening in the opposite direction (clockwise) may be specified. 4.4.7.6 Method of securing. Wrench nuts or handwheels shall be fitted to the valve stem on NRS valves. Handwheels shall be fitted to the stem nut on OS&Y valves. In both cases, they shall be secured by mechanical means. 4.4.7.7 Color coding. Wrench nuts and handwheels that open the valve by turning to the right (clockwise) shall be painted red, and wrench nuts and handwheels that open the valve by turning to the left (counterclockwise) shall be painted black. 4.4.8 Gearing. If gears are required by the purchase documents, they shall be accurately formed and smooth running, with a pinion shaft operating in a bronze, self-lubricating, or permanently sealed antifriction bearing. 4.4.8.1 Material. Geared valves shall be equipped with steel, ductile-iron, or gray-iron gears. 4.4.8.1.1 If cast-iron gears are provided, the pinion shall be steel. 4.4.8.1.2 Material for steel gears shall be ASTM A27/A27M Grade U-60-30 or equivalent. 4.4.8.2 Gear cases. Valves using O-ring or V-type stem seals may have the gear case attached directly to the valve. 4.4.8.2.1 When geared valves are provided, enclosed gear cases are required unless definitely excluded by the purchaser’s requirements. 4.4.8.3 Indicators. When required by the purchaser, geared valves shall be equipped with indicators to show the position of the gate in relation to the waterway. 4.4.8.4 Gear ratio. Gear ratios shall not be less than those shown in Table 11. 4.4.8.5 Input torque. The maximum input torque shall be as recommended by the manufacturer. 4.4.8.6 Wrench nut/handwheel. Geared valves may have a fabricated wrench nut or handwheel with an “open” direction tag and arrow mechanically secured. 4.4.9 Bypasses. Bypass sizes vary depending on the type of bypass and the manufacturer’s valve design. |
| 35 | 4.4.9.1 Size. If a bypass is required by the purchase documents, the bypass size shall be by agreement between the purchaser and the manufacturer. See Appendix B for additional information. Sec. 4.5 Fabrication 4.5.1 Workmanship. Valve parts shall conform to their required dimensions and shall be free from defects that could prevent proper functioning of the valve. 4.5.1.1 Interchangeable parts. Like parts of valves of the same model and size produced by the same manufacturer shall be interchangeable. 4.5.1.2 Castings. Castings shall be clean and sound without defects that will weaken their structure or impair their service. 4.5.1.2.1 Plugging, welding, or repairing of cosmetic defects is allowed. 4.5.1.2.2 Repairing of structural defects is not allowed unless agreed to by the purchaser. 4.5.1.2.3 Repaired valves shall comply with the testing requirements of this standard. 4.5.2 Coating. Interior ferrous surfaces of the body and bonnet that are in contact with liquid shall be coated with a material conforming to the qualification testing requirements of ANSI/AWWA C550 to a minimum average dry film thickness of 6 mil. 4.5.2.1 Other exposed interior ferrous surfaces. Other exposed interior ferrous surfaces except finished or bearing surfaces shall be coated with a material specified in Sec. 4.2.4.11. 4.5.2.2 Exterior ferrous surfaces. A coating material as specified in Sec. 4.2.4.11 shall be applied to exterior ferrous surfaces. Table 11 Gear ratios Table 11 Gear ratios Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Nominal Valve Size Minimum Gear Ratio Minimum Gear Ratio in. in. in. (mm)* (mm)* 16–24 16–24 16–24 16–24 (400–600) (400–600) 2:1 2:1 30–36 30–36 30–36 (750–900) (750–900) 3:1 3:1 42–54 42–54 42–54 (1,050–1,350) (1,050–1,350) 4:1 4:1 60–72 60–72 60–72 (1,500–1,800) (1,500–1,800) 6:1 6:1 * Nominal valve size mm is soft conversion (nominal in. size × 25). |
| 36 | SECTION 5: VERIFICATION Sec. 5.1 Testing 5.1.1 Proof-of-design testing. 5.1.1.1 Hydrostatic gate test. One prototype valve of each size and class of the manufacturer’s design shall be hydrostatically tested with twice the specified rated pressure applied to one side of the gate and zero pressure on the other side. 5.1.1.1.1 The test is to be made in each direction across the gate for a minimum period of 5 min. 5.1.1.1.2 The manufacturer may make special provisions to prevent leakage past the seats. 5.1.1.1.3 No part of the valve or gate shall remain visually deformed by the test. 5.1.1.2 Torque test. A prototype of each size shall be overtorqued in the closed and fully open positions to demonstrate that no distortion of the valve stem or thrust collar or damage to the resilient seat occurred as evidenced by the failure to seal at the rated pressure. 5.1.1.2.1 The torque applied to the main valve stem shall be in accordance with Table 8. 5.1.1.2.2 For valves using stainless-steel stems, upon disassembly there shall be no visible evidence of galling on the stem, thrust collar, or stem nut after completion of the torque test. 5.1.1.3 Leakage test. One prototype valve of each size shall be fully opened and closed to a seal for 500 complete cycles with sufficient flow that the valve is at the rated working pressure for the pressure differential at the point of closing. 5.1.1.3.1 The valves shall be drip-tight under the rated pressure differential applied alternately to each side of the gate after the completion of the tests. 5.1.1.4 Hydrostatic shell test. One prototype of each valve size shall be tested to 2.5 times the rated working pressure with the gate in the open position. 5.1.1.4.1 For a period of 5 min, there shall be no rupture or cracking of the valve body, valve bonnet, or seal plate. 5.1.1.4.2 Leakage at pressure-containing joints shall not be a cause for failure of the test. |
| 37 | 5.1.1.4.3 No part of the valve shall remain visibly deformed after the test. 5.1.2 Production testing. After manufacture, each gate valve shall be subjected to operation and hydrostatic tests at the manufacturer’s plant as specified in this section. 5.1.2.1 Operation test. Each valve shall be operated through a complete cycle to ensure proper functioning of parts. 5.1.2.1.1 Any defects in workmanship shall be corrected and the test repeated until a satisfactory performance is demonstrated. 5.1.2.2 Shell test. A hydrostatic test pressure equal to twice the rated working pressure of the valve shall be applied to the assembled valve with the gate in the open position. 5.1.2.2.1 The test shall show no leakage through the metal pressure-containing joints or stem seals. 5.1.2.3 Seat test. A hydrostatic test shall be made from each direction at a minimum of the rated working pressure to prove the sealing ability of each valve from both directions of flow. 5.1.2.3.1 The test shall show no leakage through the metal pressure-containing joints or past the seat. Sec. 5.2 Plant Inspection and Rejection 5.2.1 Plant inspection. Work performed according to this standard, except prototype testing, shall be subject to inspection and acceptance by the purchaser, who shall have access to places of manufacture where these valves are being produced and tested. 5.2.2 Rejection. Any valve or part that may be determined as not conforming to the requirements of this standard shall be made satisfactory, or it shall be rejected and repaired or replaced by the manufacturer. 5.2.2.1 Repair. Repaired valves must be acceptable to the purchaser and specifically accepted when submitted or resubmitted. 5.2.3 Affidavit of compliance. Whether the purchaser has a representative at the plant or not, an affidavit of compliance may be required from the manufacturer as provided in Sec. 6.3 of this standard. |
| 38 | SECTION 6: DELIVERY Sec. 6.1 Marking 6.1.1 Markings. Markings shall be cast on the bonnet or body or provided on a corrosion-resistant tag affixed to each valve. 6.1.1.1 Requirements. Markings shall show the manufacturer’s name or mark, the year the valve was made, the size of the valve, the letters “C509” and the designation of working water pressure; for example, “250W.” 6.1.1.1.1 Special markings in addition to these can be supplied when specified by the purchaser’s requirements on agreement between purchaser and manufacturer. Sec. 6.2 Preparation for Shipment 6.2.1 Completeness. Valves shall be complete in detail when shipped. 6.2.1.1 Draining. Valves shall be drained before shipment. 6.2.1.2 Separate packaging. Handwheels and valve accessories may be packed separately. Sec. 6.3 Affidavit of Compliance The manufacturer shall, when required by the purchase documents, provide the purchaser with an affidavit stating that the valve and materials used in its construction conform to the applicable requirements of this standard and the purchase documents and that tests specified in this standard have been performed and test requirements have been met. |
| 39 | APPENDIX A APPENDIX A Installation, Operation, and Maintenance of Resilient-Seated Gate Valves This appendix is for information only and is not a part of ANSI/AWWA C509. |
| 40 | SECTION A.3 RECEIVING INSPECTION Resilient-seated gate valves should be inspected at the time of receipt for damage during shipment. The initial inspection should verify compliance with specifications, direction of opening, color, size and shape of operating nut, number of turns to open or close, and type of end connections. A visual inspection of the seating surfaces should be performed to detect any damage during shipment or scoring of the seating surfaces. Inspection personnel should look for bent stems, broken handwheels, cracked parts SECTION A.4 STORAGE Valves should be stored indoors. If outside storage is required, the valves should be protected from weather elements. During outside storage, they should be protected from the weather, sunlight, ozone, and foreign materials. In colder climates where valves may be subject to freezing temperatures, it is absolutely essential to prevent water from collecting in the valves. Failure to do so may result in a cracked valve casting or deterioration of the resilient-seat material. SECTION A.5 INSTALLATION Instructions supplied by manufacturers should be reviewed in detail before valves are installed. At the jobsite before installation, each valve should be visually inspected and any foreign material in the interior portion of the valve should be removed. A detailed inspection of the valve as outlined in Sec. A.3 should be performed before installation. Sec. A.5.1 Bolts Bolts should be checked for proper tightness and protected by the installer to prevent corrosion, either with a suitable paint, bitumastic material, and/or by polyethylene wrapping or other suitable means of corrosion protection. |
| 41 | Sec. A.5.2 Underground Installation Valves in water-distribution lines shall, where practical, be located in easily accessible areas. A.5.2.1 During installation, there is the possibility of foreign materials inadvertently entering the valve. Foreign material can damage internal working parts during operation of the gate valve. For this reason, gate valves should be installed in the closed position. Each valve should be placed on firm footing in the trench to prevent settling and excessive strain on the connection to the pipe. Piping systems should be supported and aligned to avoid damage to the valve. A.5.2.2 A valve box or vault should be provided for each valve used in a buried-service application. The valve box should be installed so as not to transmit loads or stress to the valve, valve stem, or piping system. The valve box should be centered over the operating nut of the valve with the box cover flush with the surface of the finished area or another level as directed by the purchaser. Valve boxes should be designed so that a traffic load on the top of the box is not transmitted to the valve stem or A.5.2.3 Valves buried in unusually deep trenches have special provisions for operating the valve. These are either a riser on the stem to permit a normal key to be used or a notation on valve records that a long key will be required. A.5.2.4 When valves with exposed gearing or operating mechanisms are installed belowground, a vault designed to allow pipe clearance and prevent settling on the pipe should be provided. The operating nut should be accessible from the top opening of the vault with a valve key. The size of the vault should provide for easy removal of the valve bonnet and internal parts of the valve for purposes of repair. Consideration should be given to the possible entry of groundwater or surface water and to the need to pr Sec. A.5.3 Aboveground Installation Valves installed aboveground or in a plant piping system should be supported and aligned to avoid damage to the valve. Valves should not be used to correct misalignment of piping. |
| 42 | Sec. A.5.4 Inspection After installation and before pressurization of the valve, pressure-containing bolting (bonnet, seal plate, packing gland, and end connections) should be inspected for adequate tightness to prevent leakage. In addition, an inspection should be made for adequate tightness of tapped and plugged openings to the valve interior. Proper inspection at this time will minimize the possibility of leaks after the piping system has been pressurized. Sec. A.5.5 Testing To prevent time lost searching for leaks, it is recommended that valve excavations not be backfilled until pressure tests have been completed. After installation, it is desirable to test newly installed piping sections, including valves, at some pressure above the system design pressure. The test pressure should not exceed the rated working pressure of the valve. After the test, steps should be taken to relieve any trapped pressure in the body of the valve. The resilient-seated gate valve should not be oper Sec. A.5.6 Records Once the valve is installed, the valve location, size, make, type, date of installation, number of turns to open, direction of opening, and other information deemed pertinent should be entered on permanent records. Sec. A.5.7 Application Hazards Resilient-seated gate valves should not be installed in applications or for service other than those recommended by the manufacturer. The following list of precautions is not inclusive but will help avoid some application hazards. A.5.7.1 Resilient-seated gate valves should not be installed in lines where service pressure will exceed the rated working pressure of the valve. |
| 43 | A.5.7.2 Resilient-seated gate valves should not be used for throttling service unless the design is specifically recommended for that purpose or accepted in advance by the manufacturer. A.5.7.3 Resilient-seated gate valves should not be used in applications that are exposed to freezing temperatures unless sufficient flow is maintained through the valve or other protection is provided to prevent freezing. A.5.7.4 Pipe, fittings, and valves installed in underground piping are generally joined with push-on or mechanical joints. These joints are considered unrestrained-type joints because no significant restraint against longitudinal separation is provided. Gate valves should not be installed at a dead end or near a bend in a pipeline without proper and adequate restraint to support the valve and prevent it from blowing off the end of the line. Rigid piping systems incorporating flanged valves are not recommended for buried service. Thrust blocks, restrained joints, or other means of restraint are needed: • on or adjacent to valves on pipelines; • where unusual conditions exist, such as high internal pressures, adjacent fittings, or unsuitable soils; or • as a means to anchor a pressurized pipe section when an adjacent section is depressurized to be modified or repaired. A.5.7.5 To prevent damage, 3-in. (75-mm) NPS and 4-in. (100-mm) NPS resilient-seated gate valves should not be operated with input torques greater than 200 ft-lb (270 Nm). Gate valves 6-in. (150-mm) NPS to 16-in. (400-mm) NPS should not be operated with input torques greater than 300 ft-lb (406 Nm). For valves larger than 16 in. (400 mm), consult the manufacturer. SECTION A.6 MAINTENANCE Sec. A.6.1 Valve Exercising Each valve should be operated through a full cycle and returned to its normal position on a time schedule that is designed to prevent a buildup of tuberculation or other deposits that could render the valve inoperable or prevent a tight shutoff. The interval of time between operations of valves in critical locations or valves subjected to severe operating conditions should be shorter than for other less important installations, but it can be whatever period is found to be satisfactory based on local experie |
| 44 | When using portable auxiliary power actuators with input torque capacities exceeding the maximum operating torques recommended in Sec. A.5.7.5, extreme care should be taken to avoid applying excessive torque to the valve stem. If the actuator has a torque-limiting device, it should be set below the values in Sec. A.5.7.5. If there is no torque-limiting device, the recommended practice is to stop the power actuator three or four turns before the valve is fully opened or fully closed and complete the operatio Maintenance should be performed at the time a malfunction is discovered to avoid a return trip to the same valve or to prevent neglecting it altogether. A recording system should be adopted that provides a written record of valve location, condition, maintenance, and each subsequent inspection of the valve. Sec. A.6.2 Inspection Each valve should be operated through one complete operating cycle. If the stem action is tight, the operation should be repeated several times until proper operation is achieved. With the gate in the partially open position, a visual inspection should be performed, where practical, to check for leakage at joints, connections, and areas of packing or seals. If leakage is observed, defective O-rings, seals, gaskets, or end-connection sealing members should be replaced. If the leakage cannot be corrected imme |
| 45 | Sec. A.6.3 Record Keeping To carry out a meaningful inspection and maintenance program, it is essential that the location, make, type, size, and date of installation of each valve be recorded. Depending on the type of record-keeping system used, other information may be entered in the permanent record. When a resilient-seated gate valve is inspected, an entry should be made in the permanent record indicating date of inspection and condition of the valve. If repair work is necessary, it should be indicated; on completion of the work, SECTION A.7 REPAIRS Leakage, broken parts, hard operation, and other major defects should be corrected by a repair crew as soon as possible after the defect is reported. If repairs are to be performed in the field, the repair crew should take a full complement of spare parts to the jobsite. Provisions should be made to isolate the defective valve from water pressure and relieve internal trapped pressure before performing any corrective maintenance. Disassembly of the valve should be accomplished in accordance with the procedur After repair of the valve, the operating mechanism should be cycled through one complete operating cycle. With full line pressure applied to the valve in the open position, an inspection should be made to detect leakage in the areas around the seal plate, bonnet, packing gland, and body-end connections. A record should be made to indicate that the valve has been repaired and is in working condition. Any markings that the valve is inoperable should be deleted. In addition, fire departments and other appropri |
| 47 | APPENDIX B APPENDIX B Valve Bypasses This appendix is for information only and is not a part of ANSI/AWWA C509. SECTION B.1 GENERAL During the design of a water transmission system, it is important to consider the functional requirements of the entire system before deciding about the need and size of a bypass. Large gate valves (16 in. and larger) may be purchased with or without a bypass. There are applications where bypasses may be desired. If a bypass is desired, its size will be determined based on the mainline gate valve design, application, and location along the pipeline. There are two primary reasons for requiring a bypass: the first is to fill an empty section of pipeline, and the second is to aid in the operation (opening or closing) of a gate valve by equalizing differential pressure across the gate. Further discussion on these two reasons is presented subsequently. SECTION B.2 FILLING A PIPELINE Filling a downstream pipeline is an operation that must be done at a controlled, slow flow rate that will allow air to escape without causing damage to the pipeline, air release valves, or other pipeline appurtenances. Throttling the flow through a large gate valve can cause damage to the seating surfaces of the valve. Instead, the filling rate can be controlled with a smaller-diameter bypass valve to fill the empty pipeline to avoid damage to the mainline valve seat. SECTION B.3 PRESSURE EQUALIZATION There may be instances where a valve bypass functions to reduce a high-pressure differential between the upstream and the downstream sides of a closed mainline gate valve. In these instances, an excessive (or large) pressure differential may increase the torque required to operate the mainline valve due to the higher friction along the sealing surfaces. Opening a smaller-diameter bypass valve may help to balance water pressure on both sides of the mainline gate valve, thus reducing the torque required to op |
| 48 | SECTION B.4 TYPES OF BYPASSES A bypass can be supplied by the valve manufacturer as an integral or nonintegral option on a large gate valve. There may be constraints to the size and shape of an integral bypass due to lay length of the primary valve. Another option is to design a bypass using pipe, fittings, and a valve to be installed during pipeline construction. Whether manufacturer-supplied or field-fabricated, the pressure rating of the bypass system components would need to match or exceed the pressure rating of the larger mainline The end user determines if a bypass is needed for the large-diameter gate valve. It is recommended that the valve manufacturer be consulted when considering a bypass. |
| 52 | 1714147816479 ISBN 978-1-64717-141-4 1714147816479 ISBN 978-1-64717-141-4 1714147816479 ISBN 978-1-64717-141-4 1P 8.5C 43509-23 6/23 QI 1P 8.5C 43509-23 6/23 QI |
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