4500 Series Non Return Valves

Gases	Filtered lubricated or non lubricated air, inert gas, sweet (natural) gases. Sour gas option available (details on application)
Liquids	Low pressure hydraulic, mineral oil or water
Working Pressure (gases & liquids)	12 bar (174 psi); 25 bar (362 psi)
Minimum opening pressure	0.2 bar (2.90 psi)
Working Temperature	-20ºC to +70ºC (-4ºF to +158ºF); Low temperature version; -50ºC (-58ºF ) (optional)
Maximum Flow L/min (SCFM) Cv(Kv)	6 bar (87 psi), 1 bar (14.5 psi) differential
Non return valves (12 bar)	1/4” 1600(57) 1.6(25); 3/8” 2200(80) 2.3(35); 1/2” 3800(137) 3.9(60); 3/4” 5800(205) 5.8(90); 1” 7700(274) 7.8(120)
Non return valves (25 bar)	1/4” 736(26 ) 0.74(11.4); 3/8” 1840(65) 1.85(28.5); 1/2” 2600(91) 2.60(40)
Construction Materials	Stainless Steel AISI 316L to NACE MR-01-75 Body; Stainless Steel AISI 316L to NACE MR-01-75 Internals; Acetal poppet; 316 Stainless Steel Spring; Nitrile Seals