Danfoss NRVA 25 Check Valve 25 mm (1 in) Butt Weld

Danfoss NRVA 25 check valve (non-return valve) for industrial refrigeration, OEM P/N 020-2002. Prevents reverse flow of refrigerant in liquid, suction and hot-gas lines of ammonia (R717), HCFC and HFC plant. Butt-weld connection 25 mm (1 in) to EN 10220 (ANSI B 36.10 pipe schedules). Fitted with a damping piston, so it is suited to pulsating lines such as the compressor discharge line, and a PTFE valve seat for tight seating with minimum closing force. No orientation limitation. Max working pressure 40 bar (580 psig); media temperature -50 °C to 140 °C. NRVA = standard spring; a stronger spring is available for special duties (see ordering table). Verify refrigerant compatibility against the datasheet.

Brand

Danfoss Part number: 020-2002 Model: NRVA 25 check valve (non-return valve), industrial refrigeration Category: HVAC & Refrigeration — Check Valves Direction: Straightway Connection: Butt weld, EN 10220 (ANSI B 36.10), 25 mm (1 in), inlet and outlet Max working pressure (PS/MWP): 40 bar (580 psig) Media temperature range: -50 °C to 140 °C (-58 °F to 284 °F) Kv: 19 m³/h (Cv 22 gal/min) Flow: single flow, with built-in damping piston Net weight: 3.2 kg (gross 3.206 kg) Packing: Multi pack (6 pc) EAN: 5702422048305 Materials: Valve housing steel (A352 LCC / P285QH); valve seat PTFE; spring stainless steel (A2-70); damping piston stainless steel Approvals: PED (Art. 4 par. 3), EU RoHS Refrigerants: HCFC, HFC and R717 (Ammonia) — see datasheet for the full approved list Type: NRVA 25 Product group: Check valves China RoHS compliance: Yes Connection Code: (2001:D26:25) Connection size [in]: 1 in Connection size [mm]: 25 mm Connection standard: EN 10220 Connection type: Butt weld Cv value [gal/min]: 22.04 gal/min EU RoHS compliance: Yes Fluid Group: 1 Kv value [m³/h]: 19 m³/h Max. Working Pressure [bar]: 40 bar Max. Working Pressure [psig]: 580 psig PED category: Art. 4, par. 3 REACH Candidate List substances: No Temperature range [°C] [max]: 140 °C Temperature range [°C] [min]: -50 °C Temperature range [°F] [max]: 284 °F Temperature range [°F] [min]: -58 °F

Material

Valve housing steel (A352 LCC / P285QH); valve seat PTFE; spring stainless steel (A2-70); damping piston stainless steel

Pressure Rating

40 bar (580 psig) max working pressure

Temperature Range

-50 °C to 140 °C

Classification / Approval

PED (Art. 4 par. 3), EU RoHS

HS Code

8481.30