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Danfoss NRV check valves

Сheck valves Danfoss NRV designed for use in liquid and suction lines as well as hot gas lines of refrigeration and air conditioning systems. They are intended for work with HCFC, HFC and HC flammable refrigerants. They are used to control the unidirectional flow of refrigerant so as to prevent backflow. Built-in damping piston that makes the valves suitable for installation in lines where pulsation can occur, e.g. in the discharge line from the compressor. Special models are available for CO2 units with maximum operating pressure 90 bar.

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Selection parameters
Evaporation
Condensation
Model
ascending
Inlet connection type
ascending
Inlet connection diameter
ascending
Body geometry
ascending
Maximum operating pressure [bar]
ascending
Inlet flow speed [m/s]
ascending
Pressure drop [bar]
Dostępność
Cena
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NRV 6

Inlet connection type:
Flare
Inlet connection diameter:
1/4"
Body geometry:
Straightway
Maximum operating pressure [bar]:
46
Inlet flow speed [m/s]:
7.98
Pressure drop [bar]:
0.28
Dostępność:
Niedostępny
Cena:
Na zapytanie

NRV 6s

Inlet connection type:
Soldered, ODF (mm), Soldered, ODF (inch)
Inlet connection diameter:
1/4", 3/8", 6 mm, 10 mm
Body geometry:
Straightway
Maximum operating pressure [bar]:
49
Inlet flow speed [m/s]:
7.98
Pressure drop [bar]:
0.28
Dostępność:
Niedostępny
Cena:
Na zapytanie

NRV 10

Inlet connection type:
Flare
Inlet connection diameter:
3/8"
Body geometry:
Straightway
Maximum operating pressure [bar]:
46
Inlet flow speed [m/s]:
2.00
Pressure drop [bar]:
0.08
Dostępność:
Niedostępny
Cena:
Na zapytanie

NRV 10s

Inlet connection type:
Soldered, ODF (mm), Soldered, ODF (inch)
Inlet connection diameter:
3/8", 1/2", 10 mm, 12 mm
Body geometry:
Straightway
Maximum operating pressure [bar]:
49
Inlet flow speed [m/s]:
2.00
Pressure drop [bar]:
0.08
Dostępność:
Niedostępny
Cena:
Na zapytanie

NRV 12

Inlet connection type:
Flare
Inlet connection diameter:
1/2"
Body geometry:
Straightway
Maximum operating pressure [bar]:
46
Inlet flow speed [m/s]:
1.58
Pressure drop [bar]:
0.03
Dostępność:
Niedostępny
Cena:
Na zapytanie

NRV 12s

Inlet connection type:
Soldered, ODF (mm), Soldered, ODF (inch)
Inlet connection diameter:
1/2", 5/8", 12 mm
Body geometry:
Straightway
Maximum operating pressure [bar]:
49
Inlet flow speed [m/s]:
1.58
Pressure drop [bar]:
0.03
Dostępność:
Niedostępny
Cena:
Na zapytanie

NRV 16

Inlet connection type:
Flare
Inlet connection diameter:
5/8"
Body geometry:
Straightway
Maximum operating pressure [bar]:
46
Inlet flow speed [m/s]:
0.76
Pressure drop [bar]:
0.03
Dostępność:
Niedostępny
Cena:
Na zapytanie

NRV 16s

Inlet connection type:
Soldered, ODM (inch), Soldered, ODF (mm), Soldered, ODF (inch)
Inlet connection diameter:
1/2", 5/8", 3/4", 18 mm, 19 mm
Body geometry:
Straightway
Maximum operating pressure [bar]:
49
Inlet flow speed [m/s]:
0.76
Pressure drop [bar]:
0.03
Dostępność:
Niedostępny
Cena:
Na zapytanie

NRV 19

Inlet connection type:
Flare
Inlet connection diameter:
3/4"
Body geometry:
Straightway
Maximum operating pressure [bar]:
46
Inlet flow speed [m/s]:
0.57
Pressure drop [bar]:
0.02
Dostępność:
Niedostępny
Cena:
Na zapytanie

NRV 19s

Inlet connection type:
Soldered, ODF (mm), Soldered, ODF (inch)
Inlet connection diameter:
3/4", 7/8", 18 mm, 19 mm
Body geometry:
Straightway
Maximum operating pressure [bar]:
49
Inlet flow speed [m/s]:
0.57
Pressure drop [bar]:
0.02
Dostępność:
Niedostępny
Cena:
Na zapytanie

NRV 22s

Inlet connection type:
Soldered, ODF (mm), Soldered, ODF (inch)
Inlet connection diameter:
7/8", 1 1/8", 28 mm
Body geometry:
Angleway
Maximum operating pressure [bar]:
46
Inlet flow speed [m/s]:
0.35
Pressure drop [bar]:
0.02
Dostępność:
Niedostępny
Cena:
Na zapytanie

NRV 22s E

Inlet connection type:
Soldered, ODF (mm), Soldered, ODF (inch)
Inlet connection diameter:
7/8", 1 1/8", 28 mm
Body geometry:
Angleway
Maximum operating pressure [bar]:
49
Inlet flow speed [m/s]:
Pressure drop [bar]:
Dostępność:
Niedostępny
Cena:
Na zapytanie

NRV 28s

Inlet connection type:
Soldered, ODF (mm), Soldered, ODF (inch)
Inlet connection diameter:
1 1/8", 1 3/8", 28 mm
Body geometry:
Angleway
Maximum operating pressure [bar]:
46
Inlet flow speed [m/s]:
0.20
Pressure drop [bar]:
0.02
Dostępność:
Niedostępny
Cena:
Na zapytanie

NRV 28s E

Inlet connection type:
Soldered, ODF (mm), Soldered, ODF (inch)
Inlet connection diameter:
1 1/8", 1 3/8", 28 mm
Body geometry:
Angleway
Maximum operating pressure [bar]:
49
Inlet flow speed [m/s]:
Pressure drop [bar]:
Dostępność:
Niedostępny
Cena:
Na zapytanie

NRV 35s

Inlet connection type:
Soldered, ODF (mm), Soldered, ODF (inch)
Inlet connection diameter:
1 3/8", 1 5/8", 42 mm
Body geometry:
Angleway
Maximum operating pressure [bar]:
46
Inlet flow speed [m/s]:
0.12
Pressure drop [bar]:
0.02
Dostępność:
Niedostępny
Cena:
Na zapytanie

NRV 35s E

Inlet connection type:
Soldered, ODF (mm), Soldered, ODF (inch)
Inlet connection diameter:
1 3/8", 1 5/8", 42 mm
Body geometry:
Angleway
Maximum operating pressure [bar]:
49
Inlet flow speed [m/s]:
Pressure drop [bar]:
Dostępność:
Niedostępny
Cena:
Na zapytanie

Сheck valves Danfoss NRV are available in straight and angle versions, it solve the resonance problem with partial thermal load on the cooling system.

Soldered versions of NRV are compliant with ATEX hazard zone 2.

Application:

  • Traditional refrigeration
  • Heat pump systems
  • Air conditioning units
  • Liquid coolers
  • Transport refrigeration

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