ASHRAE Standard 158.1 2019
$38.46
ASHRAE Standard 158.1-2019 – Methods of Testing Capacity of Refrigerant Solenoid Valves (ANSI/ASHRAE)
| Published By | Publication Date | Number of Pages |
| ASHRAE | 2019 | 18 |
ASHRAE Standard 158.1 prescribes a method of testing the capacity of refrigerant solenoid valves for use in refrigerating systems.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | ANSI/ASHRAE Standard 158.1-2019 |
| 3 | CONTENTS |
| 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 Instruments 7 4.5 Electrical Measuring Instruments 4.6 Electric Power Source 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… 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 6.2 Test Conditions |
| 6 | 6.3 Data to be Reported Figure 1 Water-flow test-system schematic. 6.4 Test Procedure 6.5 Flow Capacity Calculations 6.6 Determine the Refrigerant Liquid Mass Flow Capacity of the Valve under Test. The mass flow rate of any Newtonian liquid through the valve under test may be predicted, within the range of rDPs tested with water, by using the following procedure. |
| 7 | Figure 2 Airflow test-system schematic. 7. VAPOR FLOW CAPACITY TEST 7.1 Apparatus 7.2 Test Conditions 7.3 Data to be Reported 7.4 Test Procedure 7.5 Flow Capacity Calculations |
| 8 | 7.6 Determine the Refrigerant Vapor Mass Flow Capacity of the Valve under Test. The mass flow rate of any gaseous Newtonian fluid through the valve under test may be predicted, within the range of DPs and acoustic ratios tested with air, by using the… 8. MAXIMUM OPERATING PRESSURE DIFFERENTIAL (MOPD) TEST 8.1 Apparatus |
| 9 | Figure 3 MOPD test-system schematic. Figure 4 Typical electrical test apparatus for an alternating-current solenoid valve 8.2 Test Conditions 8.3 Data to be Reported 8.4 Test Procedure |
| 10 | 9. REFERENCES Figure 5 Typical electrical test apparatus for a direct-current solenoid valve. |
| 11 | INFORMATIVE APPENDIX A: EXAMPLES OF TEST CONDITIONS, DATA SHEETS, AND GRAPHS Table A-1 Example of Preselected Gas-Flow Test Conditions Table A-2 Example of a Data Sheet for Water-Flow Testing |
| 12 | Figure A-1 Example of linear plot of incompressible flow data. Table A-3 Example of Data Sheet for Gas-Flow Testing |
| 13 | Figure A-2 Example of linear plot of acoustic ratio versus compressible flow coefficient. |
| 14 | INFORMATIVE APPENDIX B: EXAMPLE OF COMPUTATION TO EXPRESS VALVE CAPACITY IN TERMS OF REFRIGERATING EFFECT |
| 15 | INFORMATIVE APPENDIX C: INFORMATIVE BIBLIOGRAPY |
