Danfoss NRV 28s E Check Valve 35 mm ODF Angleway 020-3056
Danfoss · HVAC & Refrigeration · Check Valves
Danfoss NRV 28s E piston-type check valve (non-return valve), OEM P/N 020-3056. Controls unidirectional refrigerant flow to prevent back-flow in commercial refrigeration and air-conditioning systems. Angleway pattern, Solder, ODF, 35 mm (1 3/8 in), inlet and outlet. This "E" version is rated to a maximum working pressure of 49 bar (710 psig) with a media temperature range of -50 to 155 °C (-58 to 311 °F). NRV uses the standard spring (min. opening pressure differential 0.04 bar / 0.58 psi). Kv 16.5 m³/h (Cv 19.07 gal/min). Single flow with built-in damping piston. Refrigerant compatibility per the NRV/NRVH datasheet — verify against your system charge. Price on quote.
Specifications
- Part number
- 020-3056
- HS code
- 8481.30
- Material
- Connection tube copper; solder ring brass; sealing disk brass; piston stainless steel; spring brass; valve body brass; guide brass; washer PTFE with glass fibre
- Pressure rating
- 49 bar (710 psig) max working pressure
- Temperature range
- -50 to 155 °C
Compatibility
Install in the direction of the flow arrow. The differential pressure across the valve must exceed the minimum opening pressure differential (0.04 bar), 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