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Address: 608, Building B, Yinyi Duhui Guoji, No.8, Lane 559, Youngor Avenue, Haishu District, Ningbo, China
Contact name:Brandon Bao
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Danfoss Type Refrigeraion Check Valve NRV NRVH 1/4'' 3/8'' 1/2'' 5/8'' 3/4'' 7/8''
NRV and NRVH refrigeration check valves can be used in liquid, suction and hot gas lines in refrigeration and air conditioning plant with HCFC. HFC and HC flammable refrigerants. The valves ensure the correct flow direction and prevent back-condensation from a warm part of the system to the cold evaporator. A built-in damping piston makes the valves suitable for installation in lines where pulsation can occur. e. g. in the discharge line from the compressor.
Technical Data of NRV, NRVH Straightway Solder Check Valve:
| Model | Connection Type | Connection Size | Pressure drop across valve | Kv value | Cv value | Code no | ||
| inch | mm | bar | psi | m3 /h | gal/min | |||
| NVR 6s | Straight-way, Solder | 1/4'' | - | 0.07 | 1.01 | 0.56 | 0.65 | 020-1010 |
| 6 | 0.07 | 1.01 | 0.56 | 0.65 | 020-1014 | |||
| NVR 6s | 1/4'' | - | 0.07 | 1.01 | 0.56 | 0.65 | 020-1057 | |
| 6 | 0.07 | 1.01 | 0.56 | 0.65 | 020-1050 | |||
| NVRH 6s | 3/8'' | - | 0.3 | 4.35 | 0.56 | 0.65 | 020-1069 | |
| 10 | 0.3 | 4.35 | 0.56 | 0.65 | 020-1062 | |||
| NVR 10s | 3/8'' | - | 0.07 | 1.01 | 1.2 | 1.39 | 020-1011 | |
| 10 | 0.07 | 1.01 | 1.2 | 1.39 | 020-1015 | |||
| NVRH 10s | 1/2'' | - | 0.3 | 4.35 | 1.2 | 1.39 | 020-1046 | |
| 12 | 0.3 | 4.35 | 1.2 | 1.39 | 020-1036 | |||
| NVR 10s | 1/2'' | - | 0.07 | 1.01 | 1.2 | 1.39 | 020-1058 | |
| 12 | 0.07 | 1.01 | 1.2 | 1.39 | 020-1051 | |||
| NVRH 10s | 1/2'' | - | 0.3 | 4.35 | 1.2 | 1.39 | 020-1070 | |
| 12 | 0.3 | 4.35 | 1.2 | 1.39 | 020-1063 | |||
| NVR 12s | 1/2'' | - | 0.05 | 0.72 | 2.05 | 2.37 | 020-1012 | |
| 12 | 0.05 | 0.72 | 2.05 | 2.37 | 020-1016 | |||
| NVRH 12s | 1/2'' | - | 0.3 | 4.35 | 2.05 | 2.37 | 020-1039 | |
| 12 | 0.3 | 4.35 | 2.05 | 2.37 | 020-1037 | |||
| NVR 12s | 5/8'' | 16 | 0.05 | 0.72 | 2.05 | 2.37 | 020-1052 | |
| NVRH 12s | 5/8'' | 16 | 0.3 | 4.35 | 2.05 | 2.37 | 020-1064 | |
| NVR 16s | 5/8'' | 16 | 0.05 | 0.72 | 3.6 | 4.16 | 020-1018 | |
| NVRH 16s | 5/8'' | 16 | 0.3 | 4.35 | 3.6 | 4.16 | 020-1038 | |
| NVR 16s | - | 18 | 0.05 | 0.72 | 3.6 | 4.16 | 020-1053 | |
| NVRH 16s | - | 18 | 0.3 | 4.35 | 3.6 | 4.16 | 020-1065 | |
| NVR 16s | 3/4'' | 19 | 0.05 | 0.72 | 3.6 | 4.16 | 020-1059 | |
| NVRH 16s | 3/4'' | 19 | 0.3 | 4.35 | 3.6 | 4.16 | 020-1071 | |
| NVR 19s | - | 18 | 0.05 | 0.72 | 5.5 | 6.36 | 020-1017 | |
| NVRH 19s | - | 18 | 0.3 | 4.35 | 5.5 | 6.36 | 020-1008 | |
| NVR 19s | 5/8'' | 19 | 0.05 | 0.72 | 5.5 | 6.36 | 020-1019 | |
| NVRH 19s | 5/8'' | 19 | 0.3 | 4.35 | 5.5 | 6.36 | 020-1023 | |
| NVR 19s | 7/8'' | 22 | 0.05 | 0.72 | 5.5 | 6.36 | 020-1054 | |
| NVRH 19s | 7/8'' | 22 | 0.3 | 4.35 | 5.5 | 6.36 | 020-1066 | |
Main Dimension of NRV, NRVH Straightway Solder Check Valve:
| Model | Connection Size | L | L2 | φD | ||
| Inch | mm | mm | mm | mm | ||
| NRV 6s | NRVH 6s | 1/4'' | 6 | 92 | 7 | 18 |
| NRV 6s | NRVH 6s | 3/8'' | 10 | 95 | 9 | 18 |
| NRV 10s | NRVH 10s | 3/8'' | 10 | 109 | 9 | 18 |
| NRV 10s | NRVH 10s | 1/2'' | 12 | 109 | 10 | 18 |
| NRV 12s | NRVH 12s | 1/2'' | 12 | 131 | 10 | 22 |
| NRV 12s | NRVH 12s | 5/8'' | 16 | 131 | 12 | 22 |
| NRV 16s | NRVH 16s | 5/8'' | 16 | 139 | 12 | 28 |
| NRV 16s | NRVH 16s | - | 18 | 139 | 14 | 28 |
| NRV 19s | NRVH 19s | - | 18 | 165 | 14 | 34 |
| NRV 16s | NRVH 16s | 3/4'' | 19 | 139 | 14 | 28 |
| NRV 19s | NRVH 19s | 3/4'' | 19 | 165 | 14 | 34 |
| NRV 19s | NRVH 19s | 7/8'' | 22 | 165 | 17 | 34 |
More Refrigeration Products for you to choose:
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| Refrigeration Solenoid Valve | Reversing Valve | Expansion Valve |
 |  |  |
| Hot Gas Bypass Valve | Crankcase Pressure Regulator | Ball Valve |
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