Check Valves 1) Sizes: 2 - 20" 2) Pressure class: 150 - 2,500lb. 3) Suitable temperature: -28 ~ 425oC Check ValvesTechnical features:Suitable for domestic water services, heatingand air-conditioning plants, compressed airsystems. It can be installed in any position:vertical, horizontal, oblique.Minimum and maximum working temperature: -20oC, 100oCAvailable: in all sizes from3/8" up to 2"Materials ...