AHRI 761 SI-2014 Performance Rating of Solenoid Valves for Use with Volatile Refrigerants.pdf

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1、 2014 Standard for Performance Rating of Solenoid Valves for Use with Volatile Refrigerants Approved by ANSI on May 15, 2015 ANSI/AHRI Standard 761 (SI) Price $10.00 (M) $20.00 (NM) Copyright 2014, by Air-Conditioning, Heating, and Refrigeration Institute Printed in U.S.A. Registered United States P

2、atent and Trademark Office Note: This standard supersedes AHRI Standard 760-2007. For I-P ratings, see ANSI/AHRI Standard 760 (I-P)-2014. IMPORTANT SAFETY DISCLAIMER AHRI does not set safety standards and does not certify or guarantee the safety of any products, components or systems designed, teste

3、d, rated, installed or operated in accordance with this standard/guideline. It is strongly recommended that products be designed, constructed, assembled, installed and operated in accordance with nationally recognized safety standards and code requirements appropriate for products covered by this st

4、andard/guideline. AHRI uses its best efforts to develop standards/guidelines employing state-of-the-art and accepted industry practices. AHRI does not certify or guarantee that any tests conducted under the standards/guidelines will not be non-hazardous or free from risk. TABLE OF CONTENTS SECTION P

5、AGE Section 1. Purpose 1 Section 2. Scope .1 Section 3. Definitions .1 Section 4. Test Requirements .2 Section 5. Rating Requirements .2 Section 6. Minimum Data Requirements for Published Ratings 4 Section 7. Marking and Nameplate Data 4 Section 8. Conformance Conditions .4 TABLES Table 1. Standard

6、Rating Conditions .2 Table 2. Published Application Ratings for Discharge Gas Service .4 APPENDICES Appendix A. References - Normative .5 Appendix B. References - Informative .5 Appendix C. Method of Testing for Rating Solenoid Valves for Maximum Operating Pressure Differential (MOPD) - Normative 6

7、Appendix D. Recommended Standard Connection Sizes - Informative .13 TABLES FOR APPENDICES Table C1. Pressure-tap Hole Diameters and Lengths 8 Table D1. Recommended Standard Connection Sizes .13 FIGURES FOR APPENDICES Figure C1. Typical System Piping for Solenoid Valve MOPD Test with Gas or Liquid .7

8、 Figure C2. Typical Electrical Test Apparatus for an Alternating Current Solenoid Valve .9 Figure C3. Typical Electrical Test Apparatus for a Direct Current Solenoid Valve .10 _ANSI/AHRI STANDARD 761 (SI)-2014 1 PERFORMANCE RATING OF SOLENOID VALVES FOR USE WITH VOLATILE REFRIGERANTS Section 1. Purp

9、ose 1.1 Purpose. The purpose of this standard is to establish for Solenoid Valves for use with volatile refrigerants: definitions; test requirements; rating requirements; minimum data requirements for Published Ratings; marking and nameplate data; and conformance conditions. 1.1.1 Intent. This stand

10、ard is intended for the guidance of the industry, including manufacturers, engineers, installers, contractors and users. 1.1.2 Review and Amendment. This standard is subject to review and amendment as technology advances. Section 2. Scope 2.1 Scope. This standard applies to Solenoid Valves for use w

11、ith volatile refrigerants as defined in Section 3. Section 3. Definitions All terms in this document follow the standard industry definitions in the ASHRAE Terminology website (https:/www.ashrae.org/resources-publications/free-resources/ashrae-terminology) unless otherwise defined in this section. 3

12、.1 Bubble Point. Refrigerant liquid saturation temperature at a specified pressure. 3.2 Dew Point. Refrigerant vapor saturation temperature at a specified pressure. 3.3 Main. Tubing or piping by which the Solenoid Valve is connected to the apparatus. 3.4 Maximum Operating Pressure Differential (MOPD

13、). The maximum pressure difference between the solenoid valve inlet and the solenoid valve outlet at which the Solenoid Valve will operate, kPa. 3.5 Pressure Drop. The pressure difference between the solenoid valve inlet and the solenoid valve outlet with the main port (orifice) open, kPa. 3.6 Publi

14、shed Rating. A statement of the assigned values of those performance characteristics, under stated Rating Conditions, by which a unit may be chosen to fit its application. These values apply to all units of like nominal size and type (identification) produced by the same manufacturer. The term Publi

15、shed Rating includes the rating of all performance characteristics shown on the unit or published in specifications, advertising or other literature controlled by the manufacturer, at stated Rating Conditions. 3.6.1 Application Rating. A rating based on tests performed at application Rating Conditio

16、ns (other than Standard Rating Conditions). 3.6.2 Standard Rating. A rating based on tests performed at Standard Rating Conditions. 3.7 Rating Conditions. Any set of operating conditions under which a single level of performance results and which causes only that level of performance to occur. 3.7.1

17、 Standard Rating Conditions. Rating Conditions used as the basis of comparison for performance characteristics. ANSI/AHRI STANDARD 761 (SI)-2014_ 2 3.8 “Shall“ or “Should.“ “Shall“ or “should“ shall be interpreted as follows: 3.8.1 Shall. Where “shall“ or “shall not“ is used for a provision specifie

18、d, that provision is mandatory if compliance with the standard is claimed. 3.8.2 Should. “Should“ is used to indicate provisions which are not mandatory but which are desirable as good practice. 3.9 Solenoid Valve. A valve which is actuated by the magnetic action of an electrically energized coil. T

19、he opposite action is accomplished by gravity, pressure or spring action. 3.9.1 Direct-action Solenoid Valve. A valve in which the magnetic power of an electrically energized coil moves the main port (orifice) closure member. 3.9.2 Normally Closed Solenoid Valve. A valve which is closed when de-ener

20、gized. When the coil is electrically energized, the closure member is moved away from and off the port (orifice) to cause the opening action. 3.9.3 Normally Open Solenoid Valve. A valve which is open when de-energized. When the coil is electrically energized, the closure member is moved toward and o

21、nto the port (orifice) to cause the closing action. 3.9.4 Pilot-operated Solenoid Valve. A valve in which the motion of a direct-acting member allows a pressure difference to occur across the main port (orifice) closure member, causing it to move. 3.10 Solenoid Valve Capacity. The mass flow rate of

22、a fluid through the Solenoid Valve, equated to tons of refrigeration, kW, at the specified conditions. 3.11 Volatile Refrigerant. A refrigerant that changes from the liquid to the vapor state in the process of absorbing heat. Section 4. Test Requirements 4.1 Capacity Tests. All capacity tests shall

23、be in accordance with the test procedure defined in ANSI/ASHRAE Standard 158.1. 4.2 MOPD Tests. All MOPD tests shall be in accordance with the test procedure in Appendix C. 4.2.1 If the Solenoid Valve MOPD depends on the valve position, the valve shall be tested in all positions for which the rating

24、s apply. Section 5. Rating Requirements 5.1 Rating Requirements. Published capacity ratings shall consist of Standard Ratings and may include Application Ratings. The AHRI Standard Ratings of Solenoid Valve Capacity for Volatile Refrigerants shall be stated in tons of refrigeration and at the condit

25、ions specified in Table 1 5.2 Standard Rating Conditions. Standard ratings shall be for liquid service applications of solenoid valves per Table 1. 5.2.1 Liquid Service Solenoid Valve Entrance Conditions. Table 1. Standard Rating Conditions Liquid Service Solenoid Valve Rating Condition Saturated Co

26、ndenser (Dew Point) Temperature, C Liquid Service Temperature Entering the Valve, C Saturated Evaporating (Bubble Point) Temperature, C 43.0 38.0 4.0 _ANSI/AHRI STANDARD 761 (SI)-2014 3 5.2.2 Pressure Drop Values. 5.2.2.1 Liquid Service. The Pressure Drop across the Solenoid Valve shall be the close

27、st integer value in kPa equivalent to a 0.6C drop in saturation temperature. 5.2.3 In no case shall the Pressure Drop be less than required for proper operation of the Solenoid Valve. 5.2.4 The solenoid valve capacity ratings for refrigerant liquid service shall be based on the method described in S

28、ection C4.1. 5.2.5 Expansion Point Enthalpy (hf). Enthalpy based on 38C liquid refrigerant entering the liquid service Solenoid Valve. 5.2.6 Enthalpy of the Refrigerant Suction Gas (hg). Enthalpy based on vapor at a dew point pressure corresponding to 4.5C leaving the evaporator. 5.3 MOPD Ratings. M

29、OPD ratings shall be obtained in accordance with Section 4.2 and Appendix C, and shall be stated in kPa. 5.3.1 If the solenoid valve MOPD depends on the valve orientation, then it shall be rated for the orientation that results in the lowest MOPD pressure. 5.4 Application Ratings. Application Rating

30、s give performance data at operating conditions other than those given above. Applications Ratings shall contain all information shown in Section 6.2. Published Ratings shall be subject to the tolerances of this standard. 5.4.1 Liquid Service. 5.4.1.1 In addition to AHRI standard capacity ratings at

31、 pressure drop values specified in Table 1, capacity ratings may also be given at other pressure drop values, provided that they are specified as such and based on all the other conditions given in Section 5.2. 5.4.2 Suction Service. 5.4.2.1 The Pressure Drop shall be 7.0 kPa for all refrigerants un

32、less the manufacturers stated lowest pressure differential is greater than 7.0 kPa for satisfactory operation. 5.4.2.2 Solenoid Valves requiring greater than 7.0 kPa pressure differential shall show an AHRI Standard Rating at the manufacturers stated lowest pressure differential required for satisfa

33、ctory operation. 5.4.2.3 Enthalpy of the Refrigerant Suction Gas (hg). Enthalpy based on vapor at a dew point pressure corresponding to 4.4C leaving the evaporator. 5.4.3 Discharge Gas Service. 5.4.3.1 The Pressure Drop shall be 14 kPa for all refrigerants. 5.4.3.2 Discharge Gas Temperature. The tem

34、perature that would result from isentropic compression from the saturated evaporator (Dew Point) temperature with 13.9C superheat, to a saturated condensing (Bubble Point) temperature of 43.3C with 27.8C added as an approximation of the actual polytropic refrigerant compression process. 5.4.3.3 In a

35、ddition to the Standard Rating at a 14 kPa Pressure Drop, Application Ratings for discharge gas service may be published for the pressure drop values shown in Table 2 (for all refrigerants). ANSI/AHRI STANDARD 761 (SI)-2014_ 4 Table 2. Published Application Ratings for Discharge Gas Service Conditio

36、n Number Pressure Drop Values, kPa 1 34.0 2 69.0 3 172.0 4 344.0 5 517.0 6 689.0 5.5 Tolerances. To comply with this standard, measured test results shall not be less than 95% of the published capacity rating. Section 6. Minimum Data Requirements for Published Ratings 6.1 Minimum Data Requirements f

37、or Published Ratings. As a minimum, Published Ratings shall include all Standard Ratings. All claims to ratings within the scope of this standard shall include the statement “Rated in accordance with ANSI/AHRI Standard 761 (SI).” All claims to ratings outside the scope of this standard shall include

38、 the statement “Outside the scope of ANSI/AHRI Standard 761 (SI).” Wherever Applications Ratings are published or printed, they shall include a statement of the conditions at which the ratings apply. 6.2 Published Ratings. Published Ratings shall include the following information: 6.2.1 MOPD, kPa (S

39、ee Section 5.3.1, when MOPD varies with valve orientation) 6.2.2 Refrigerant designation(s) per ANSI/ASHRAE 34 with Addenda 6.2.3 AHRI standard capacity rating(s) including application (liquid/suction/discharge capacities) 6.2.4 Model designation 6.2.5 Line connections (size and type) 6.2.6 Electric

40、al characteristics: voltage(s), V; frequency(s), Hz (if alternating current); and power, W 6.2.7 Manufacturers name and address Section 7. Marking and Nameplate Data 7.1 Marking and Nameplate Data. As a minimum, each Solenoid Valve shall be marked with the following information: 7.1.1 The manufactur

41、ers name or trade name 7.1.2 Model designation 7.1.3 Electrical characteristics: voltage(s), V; frequency(s), Hz (if alternating current); and power, W 7.1.4 MOPD, kPa (See Section 5.3.1, when MOPD varies with valve orientation) Section 8. Conformance Conditions 8.1 Conformance. While conformance wi

42、th this standard is voluntary, conformance shall not be claimed or implied for products or equipment within the standards Purpose (Section 1) and Scope (Section 2) unless such claims meet all of the requirements of the standard and all of the testing and rating requirements are measured and reported

43、 in complete compliance with the standard. Any product that has not met all the requirements of the standard shall not reference, state, or acknowledge the standard in any written, oral, or electronic communication. _ANSI/AHRI STANDARD 761 (SI)-2014 5 APPENDIX A. REFERENCES - NORMATIVE A1 Listed her

44、e are all standards, handbooks and other publications essential to the formation and implementation of the standards. All references in this appendix are considered as part of the standard. A1.1 ANSI/ASHRAE Standard 34-2013, Designation and Safety Classification of Refrigerants, 2013, American Natio

45、nal Standards Institute/American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., 1791 Tullie Circle N.E., Atlanta, GA 30329, U.S.A. A1.2 ANSI/ASHRAE Standard 41.1-2013, Standard Method for Temperature Measurement, 2013, American National Standards Institute/American Society o

46、f Heating, Refrigerating and Air-Conditioning Engineers, Inc., 1791 Tullie Circle N.E., Atlanta, GA 30329, U.S.A. A1.3 ANSI/ASHRAE Standard 41.3-2014, Standard Method for Pressure Measurement, 2014, American National Standards Institute/American Society of Heating, Refrigerating and Air-Conditioning

47、 Engineers, Inc., 1791 Tullie Circle N.E., Atlanta, GA 30329, U.S.A. A1.4 ANSI/ASHRAE Standard 158.1-2012, Method of Testing Capacity of Refrigerant Solenoid Valves, 2012, American National Standards Institute/American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., 1791 Tull

48、ie Circle N.E., Atlanta, GA 30329, U.S.A. A1.5 ASHRAE Terminology, https:/www.ashrae.org/resources-publications/free-resources/ashrae-terminology, 2014, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., 1791 Tullie Circle N.E., Atlanta, GA 30329, U.S.A. APPENDIX B. REFERENCES - INFORMATIVE B1 Listed here are standards, handbooks and other publications, which may provide useful information and background but are not conside