Danfoss NRV 28s Check Valve 1 1/8 in ODF Solder Angleway 020-1021
Danfoss · HVAC & Refrigeration · Check Valves
Danfoss NRV 28s piston-type check valve (non-return valve), OEM P/N 020-1021. Controls unidirectional refrigerant flow to prevent back-flow in commercial refrigeration and air-conditioning systems. Angleway pattern, Solder, ODF, 1 1/8 in, inlet and outlet. Built-in damping piston suits lines subject to pulsation, such as the compressor discharge line. Max working pressure 46 bar (667 psig); media temperature -50 °C to 140 °C. NRV = standard spring; the stronger-spring NRVH variant is the counterpart for parallel-compressor duty. Refrigerant compatibility is listed on the datasheet — verify against your system charge.
Specifications
- Part number
- 020-1021
- HS code
- 8481.30
- Material
- Connection tube copper; solder ring brass; sealing disk brass; piston stainless steel; spring brass; valve body stainless steel; guide brass; washer PTFE with glass fibre
- Pressure rating
- 46 bar (667 psig) max working pressure
- Temperature range
- -50 °C to 140 °C
Compatibility
Install in the direction of the flow arrow. The differential pressure across the valve must exceed the minimum opening pressure differential, including at the lowest capacity of capacity-regulated compressors. Braze the ODF solder ends with care to protect the internal seals. Verify code, connection size and spring variant (NRV vs NRVH) before ordering.
Standards
Approvals
HVAC & Refrigeration · More Danfoss · Printable datasheet