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ASHRAE 158.1 2012

ASHRAE 158.1 2012

$21.13

ASHRAE Standard 158.1-2012 Methods of Testing Capacity of Refrigerant Solenoid Valves

Published By Publication Date Number of Pages
ASHRAE 2012 16
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Standard 158.1-2012 offers guidance on testing refrigerant solenoid valve capacity. Standard 158.1-2012 supersedes Standard 158.1-2004 and prescribes a method of testing the capacity of refrigerant solenoid valves for use in refrigerating systems. It specifies procedures, apparatus, and instrumentation that will produce accurate capacity data. It does not specify rating conditions or electrical or mechanical design requirements (rating conditions may be found in ANSI/AHRI Standard 760, Performance Rating of Solenoid Valves for Use with Volatile Refrigerants), make recommendations for safety, or specify tests for production, specification compliance, or field testing of solenoid valves.

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PDF Pages PDF Title
4 FOREWORD
1. PURPOSE
2. SCOPE
2.1 This standard is applicable to refrigerant solenoid valves in the following circumstances:
2.2 This standard specifies procedures, apparatus, and instrumentation that will produce accurate capacity data.
2.3 This standard does not do the following:
3. DEFINITIONS
4. INSTRUMENTATION
4.1 General. Instruments shall have the accuracies listed in this standard and shall be certified standard instruments.
4.2 Temperature-Measuring Instruments
5 4.3 Pressure-Measuring Instruments
4.4 Fluid Flow-Measuring Instruments6
5. GENERAL PIPING SPECIFICATIONS
5.1 Main Size. The pipe or tubing used for the inlet and outlet connecting mains to the solenoid valve being tested shall be the size and type accommodated by the solenoid valve body connections. The main shall be free from scale, rust, and other obs…
5.2 Main Length. The inlet and outlet mains connected to the solenoid valve being tested shall be straight for a minimum of 14 internal diameters from the face of the solenoid valve inlet and outlet connections.
5.3 Pressure-Tap Holes. Pressure-tap holes must be located at the appropriate points on the circumference of the main with respect to the adjacent surroundings. With horizontal mains, pressure-tap hole position depends largely on the fluid flowing. W…
Figure 6-1 Water flow test system schematic.
5.4 Fluid Temperature Measurement Locations. Measurement of the temperature of the fluid entering the solenoid valve shall be made at a point located not more than 12 internal main diameters upstream from the face of the inlet connection of the solen…
6. LIQUID FLOW CAPACITY TEST
6.1 Apparatus
6 6.2 Test Conditions
6.3 Data To Be Reported
6.4 Test Procedure
6.5 Flow Capacity Calculations7
6.6 Determine the Refrigerant Liquid Mass Flow Capacity of the Valve Under Test7
7. VAPOR FLOW CAPACITY TEST
7.1 Apparatus
7.2 Test Conditions
7 Figure 7-1 Airflow test system schematic.
7.3 Data To Be Reported
7.4 Test Procedure
7.5 Flow Capacity Calculations10, 11
8 7.6 Determine the Refrigerant Vapor Mass Flow Capacity of the Valve Under Test10, 11
8. REFERENCES
9 INFORMATIVE AnneX A— Examples of Test Conditions, Data Sheets, and Graphs
TABLE A-1 Example of Preselected Gas Flow Test Conditions
14 INFORMATIVE anneX B— Example of Computation to Express Valve Capacity in Terms of Refrigerating Effect

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ASHRAE 158.1 2012
$21.13