NRV and NRVH check valves can be used in liquid, suction and hot gas lines in refrigeration and air conditioning plants with HCFC, HFC and HC flammable refrigerants. Special versions, with a max. working pressure of 90 bar / 1305 psig are available for CO2 applications. The valves ensure the correct low 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.
Application: - Traditional refrigeration - Heat pump systems - Air conditioning units - Liquid coolers - Transport refrigeration - Resonance problems can be avoided at partial load in the refrigeration plant - Oversize connections provide ?exibility in use - Prevents back-condensation from warm to cold system part - Ensures correct ?ow direction - In refrigeration plants with compressors connected in parallel, it is advantageous to use NRVH, since the spring is stronger than in NRV - Available in both straightway and angleway versions - Solder versions are compliant with ATEX hazard zone 2
Approval: C UL US LISTED EAC Body material: Brass Connection compliance: ANSI Soldering 3/4 in int. DIN-EN Soldering: 19 mm int. Connection material: Copper Connection notes: Oversize Cv value [gal/min]: 4.16 gal/min DesignvPiston Direction: Straightway EAN: 5702422117407 EN13463-3 ignit. source assess: Yes Flow direction: Single-flow Flow direction indicator: On product label Gross weight: 0.2 Kg Inlet connection type: SOLDER, ODF Inlet size [in]: 3/4 IN Inlet size [mm]: 19 mm Kv value [m³/h]: 3.6 m3/h Max. Working Pressure [bar]: 46 bar Max. Working Pressure [psig]: 667 psig Min. Pressure drop [bar]: 0.05 bar Min. Pressure drop [psi]: 0.7 psi Net weight: 0.2 Kg Outlet connection type: SOLDER, ODF Outlet size [in]: 3/4 IN Outlet size [mm]: 19 mm Packing format: Multi pack Product family name: NRV Product Group: Check valves Product name: Check valve Product type: NRV 16s Quantity per packing format: 24 pc Rated cap cond, Hot gas [IMP]: tcond=86 °F tdisc=176 °F tevap=14 °F thotgas=140 °F tsub=9 °F Rated cap cond, Hot gas [SI]: tcond=30 °C tdisc=80 °C tevap=-10 °C thotgas=60 °C tsub=5K Rated cap cond, Liq. cap [IMP]: tcond=86 °F, tevap=14 °F tsub=9 °F Rated cap cond, Liq. cap [SI]: tcond=30 °C tevap=-10 °C tsub=5K Refrigerants: R1234yf, R1234ze, R1270, R134a, R22/R407C, R290, R32, R404A/R507, R407A, R407F, R410A, R448A, R449A, R450A, R452A, R452B, R454B, R513A, R600, R600a Sales restriction: No - Sales restriction exist System line application: Discharge line, Liquid feed line, Liquid line, Suction line, Wet return line Temperature range [°C] [Max]: 140 °C Temperature range [°C] [Min]: -50 °C Temperature range [°F] [Max]: 285 °F Temperature range [°F] [Min]: -58 °F UL approval file name: REFRIGERANT VALVE 53R0