Danfoss NRVA15/20-25/32-NRVA40/50 check valve introduce

Check valve type NRVA can be used in liquid,  suction and hot gas lines in refrigeration and air  conditioning plant with ammonia. NRVA can also be used in refrigerating systems  with fluorinated refrigerants. When the NRVA is used in liquid lines where  cold, thick oil or impurities may be present, it  is recommended that the standard spring be  replaced by a special spring. See ordering table.

Features • Ensures correct direction of flow. • Valve housing made of steel. • Available for 40 bar g / 580 psig working  pressure. • Large range of flanges with connection dimensions in accordance with standards: DIN, ANSI,  SOC, SA and FPT. • Fitted with damping piston that makes the  valves suitable for installation in lines where  pulsation can occur, e.g. in the discharge line  from the compressor. • Classification: DNV, CRN, BV, EAC etc.  To get an updated list of certification on the  products please contact your local Danfoss  Sales Company

Design Connections  There is a very wide range of connection  possibilities with NRVA check valves: • Welding, DIN (2448) • Welding, ANSI (B 36.10) • Welding socket, ANSI (B 16.11) • Solder connection, DIN (2856) • Solder connection, ANSI (B 16.22) • FPT internal thread, NPT  (ANSI/ASME B 1.20.1) Gaskets: Do not contain asbestos. Valve cone: The valve cone has a teflon tightening ring.  Teflon tightening ring renders perfect sealing at a  minimum closing force.