This standard covers gray-iron, ductile-iron, and cast or weld fabricated-steel or stainless steel flanged-end, low-leakage trunnion-mounted, full-port, two (2)- and four (4)-seated rotary cone valves for pressures up to 300 psi (2,100 kPa) in sizes from 6-in. through 60-in. (150-mm through 1,500-mm) diameter for use in water, wastewater, and reclaimed water systems having water with a pH greater than 6 and less than 12 and with temperatures greater than 32<\/p>\n
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| 9<\/td>\n | Foreword I.\tIntroduction. I.A.\tBackground.\u2003A type of quarter turn plug valve, rotary cone valves have been used in pipelines carrying water for more than 95 years. Manufacturers of rotary cone valves have developed rotary cone valves using metal-to-metal seats. This standard cover I.B.\tHistory.\u2003This first edition of ANSI\/AWWA C522-22, Rotary Cone Valves, 6 In. Through 60\u00a0In. (150 mm Through 1,500 mm), was approved on October 24, 2022. I.C.\tAcceptance.\u2003In 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 <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | II.\tSpecial Issues. II.A.\tGeneral.\u2003The actuating forces required to operate a rotary cone valve of a given size vary considerably and depend on the size of the valve, the differential operating pressure, the quantity of water flow, the configuration of waterway passages, and <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | II.B.\tConsiderations for Throttling Service.\u2003If a valve is to be installed for throttling service, the system owner, system designer, or purchaser must carefully evaluate the full range of differential pressures across the valve versus the downstream pres II.C.\tValve and Piping Supports.\u2003To maintain the integrity of the valve, it is important to avoid subjecting the valve to pipe loads or external loads that drive the valve out of round, such as the use of valve foundations or supports without proper pipe II.D\tPermeation.\u2003The selection of materials is critical for water service and distribution piping in locations where there is likelihood the pipe will be exposed to significant concentrations of pollutants composed of low-molecular-weight petroleum produc <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | II.E.\tValve Installation and Piping Design.\u2003The installation of rotary cone valves downstream of turbulence-inducing devices or pieces of equipment, such as pumps and piping fittings, requires some consideration to avoid various mechanical and hydraulic i <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | II.F.\tEffects of Manual or Power Actuation Stroke Time.\u2003When specifying manual and power actuators in Sec. III.A, Items 4, 23, 25, 26, and 27, consideration should be given to the effects of speed of valve operation on the pipeline hydraulic transients (s II.G.\tChlorine and Chloramine Degradation of Elastomers.\u2003The selection of 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 II.H.\tValve body\/conical plug taper angle.\u2003Since the first rotary cone valve introduced in 1926, there have been multiple taper angles employed in their design\/construction including 9 degrees, 1-1\/2\u00a0inches\/12 inches (1 mm\/8 mm), 7 degrees, 5 degrees, 1 i <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | II.I.\tIntegrally Cast or Welded Trunnions v Bolted Trunnions.\u2003Rotary cone valves were first introduced in 1926 incorporating bolted-on trunnions in lower body and upper plug design. This resulted in too many degrees of freedom and concentricity issues res II.J\tBolting Gray Cast Iron Flanges to Steel Flanges.\u2003The following recommendations are made for the use of high strength bolting used with either ASME or AWWA steel flanges when bolting to low ductility gray cast iron valve flanges. The ASME B16.1 standa <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | II.K\tFinite Element Analysis (FEA). Advisory Information on Valve Design.\u2003Calculation tools like FEA software can be used as a supplement to the equations, wall thickness tables, and size tables when listed in this standard for stress design. These calcul III.\tUse of This Standard.\u2003It is the responsibility of the user of an AWWA standard to determine that the products described in that standard are suitable for use in the particular application being considered. III.A.\tSystem Owner, System Designer, or Purchaser Options and Alternatives.\u2003The following items or information should be provided by the system owner, system designer, or purchaser: <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | III.B.\tModification to Standard.\u2003Any modification to the provisions, definitions, or terminology in this standard must be provided in the purchase documents. <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | AWWA Standard SECTION 1:\u2002GENERAL Sec.\u20021.1\tScope Table 1\tPressure classes and rated\/design pressure and fluid velocity <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Sec.\u20021.2\tPurpose Sec.\u20021.3\tApplication Sec.\u20021.4\tValve Construction Sec.\u20021.5\tDescription of Operation SECTION 2:\u2002REFERENCES <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | SECTION 3:\u2002DEFINITIONS <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Sec.\u20024.2\tMaterials <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Sec.\u20024.3\tDesign <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Table 2\tMinimum Body Shell Thickness for Bodies <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Table 3\tOperating mechanism and actuator application factors (AF) <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | Sec.\u20024.6\tAssembly of Pressure Boundary Bolted Flange Joint Assemblies. SECTION 5:\u2002VERIFICATION Sec.\u20025.1\tProduction Testing <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | Sec.\u20026.3\tHandling, Storage, and Installation <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | APPENDIX A Installation, Operation, and Maintenance of Rotary Cone Valves <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | Sample – Certified Test Report for Rotary Cone Valves <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | Sample \u2013 Quotation\/Order Specific Requirements for Rotary Cone Valves <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" AWWA C522-22 Rotary Cone Valves, 6 In. Through 60 In. (150 mm Through 1,500 mm)<\/b><\/p>\n |