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Address: 608, Building B, Yinyi Duhui Guoji, No.8, Lane 559, Youngor Avenue, Haishu District, Ningbo, China
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NRV NRVH Danfoss Type Refrigeration Check Valve 7/8'' 1 1/8'' 1 3/8'' 1 5/8''
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 Angleway 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 | |||
| NRV 22s | Angle-way, Solder | 7/8'' | 22 | 0.04 | 0.58 | 8.5 | 9.83 | 020-1020 |
| NRVH 22s | 7/8'' | 22 | 0.3 | 4.35 | 8.5 | 9.83 | 020-1032 | |
| NRV 22s | 1 1/8'' | - | 0.04 | 0.58 | 8.5 | 9.83 | 020-1060 | |
| 28 | 0.04 | 0.58 | 8.5 | 9.83 | 020-1055 | |||
| NRVH 22s | 1 1/8'' | - | 0.3 | 4.35 | 8.5 | 9.83 | 020-1072 | |
| 28 | 0.3 | 4.35 | 8.5 | 9.83 | 020-1067 | |||
| NRV 28s | 1 1/8'' | - | 0.04 | 0.58 | 16.5 | 19.07 | 020-1021 | |
| 28 | 0.04 | 0.58 | 16.5 | 19.07 | 020-1025 | |||
| NRVH 28s | 1 1/8'' | - | 0.3 | 4.35 | 16.5 | 19.07 | 020-1029 | |
| 28 | 0.3 | 4.35 | 16.5 | 19.07 | 020-1033 | |||
| NRV 28s | 1 3/8'' | 35 | 0.04 | 0.58 | 16.5 | 19.07 | 020-1056 | |
| NRVH 28s | 1 3/8'' | 35 | 0.3 | 4.35 | 16.5 | 19.07 | 020-1068 | |
| NRV 35s | 1 3/8'' | 35 | 0.04 | 0.58 | 29 | 33.52 | 020-1026 | |
| NRVH 35s | 1 3/8'' | 35 | 0.3 | 4.35 | 29 | 33.52 | 020-1034 | |
| NRV 35s | 1 5/8'' | - | 0.04 | 0.58 | 29 | 33.52 | 020-1061 | |
| 42 | 0.04 | 0.58 | 29 | 33.52 | 020-1027 | |||
| NRVH 35s | 1 5/8'' | - | 0.3 | 4.35 | 29 | 33.52 | 020-1073 | |
| 42 | 0.3 | 4.35 | 29 | 33.52 | 020-1035 | |||
Main Dimension of NRV, NRVH Angleway Solder Check Valve:
| Model | Connection Size | H1 | H2 | L1 | L2 | φD | ||
| Inch | mm | mm | mm | mm | mm | mm | ||
| NRV 22s | NRVH 22s | 7/8'' | 22 | 94 | 48 | 17 | 87 | 37 |
| NRV 22s | NRVH 22s | 1 1/8'' | 28 | 94 | 48 | 22 | 87 | 37 |
| NRV 28s | NRVH 28s | 1 1/8'' | 28 | 141 | 67 | 20 | 123 | 49 |
| NRV 28s | NRVH 28s | 1 3/8'' | 35 | 141 | 67 | 25 | 123 | 49 |
| NRV 35s | NRVH 35s | 1 3/8'' | 35 | 141 | 67 | 25 | 123 | 49 |
| NRV 35s | NRVH 35s | 1 5/8'' | 42 | 141 | 67 | 29 | 123 | 49 |
More Refrigeration Products for you to choose:
 |  |  |
| Refrigeration Solenoid Valve | Reversing Valve | Expansion Valve |
 |  |  |
| Hot Gas Bypass Valve | Crankcase Pressure Regulator | Ball Valve |
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