Danfoss NRVH 19s Check Valve 7/8 in (22 mm) ODF Straightway 020B1066
Danfoss · HVAC & Refrigeration · Check Valves
Danfoss NRVH 19s piston-type check valve (non-return valve), OEM P/N 020B1066. Controls unidirectional refrigerant flow to prevent back-flow in commercial refrigeration and air-conditioning systems. NRVH is the stronger-spring variant of the NRV line, with a higher minimum opening pressure differential (0.14 bar / 2.03 psi) than the standard NRV (about 0.02–0.04 bar); it is intended for systems with parallel-connected (power-pack) compressors where discharge-line pulsation is higher. Straightway pattern, Solder, ODF connection 7/8 in (22 mm), inlet and outlet. Built-in damping piston. Max working pressure 49 bar (710 psig); media temperature -50 to 155 °C (-58 to 311 °F). Kv 6.5 m³/h (Cv 7.51 gal/min). UL (C UL US Listed) and EAC. Refrigerant compatibility per the NRV/NRVH datasheet — verify against your system charge. Price on quote.
Specifications
- Part number
- 020B1066
- 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 (0.14 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