Main Parameter Specification Design and manufacture conform to BS5351,MSS SP-118 Connection ends conform to: 1.Butt-welded ends conform to ANSI B16.25,JB/T12224 2.Flanged ends conform to ANSI B16.5,JB79 Test and inspection conform to :API 598,GB/T13927,JB/T9092 Structure features:Bolted...
Check valves are mechanical valves that permit gases and liquids to flow in only one direction, preventing process flow from reversing. They are classified as one-way directional valves. Fluid flow in the desired direction opens the valve, while backflow closes the valve. The mechanics of check valve operation are not complicated. Most check valves contain a ball that sits freely above the seat, which has only one through hole. The ball has a slightly larger diameter than that of the through hole. When the pressure behind the seat exceeds that above the ball, liquid is allowed to flow through the valve. Once the pressure above the ball exceeds the pressure below the seat, the ball returns to rest in the seat, forming a seal that prevents backflow. We manufacture check valves in conformity with ASME B16.34 standards. All valves are tested according to API 589 requirements. The marking is as per MSS SP-25 standards.
1/2" - 4" （DN15 - DN100）
150LB - 1500LB
Carbon steel: A105 etc
Socket welding or inner screwed
Full bore or reduced bore, B.B or W.B or pressure seal bonnet, through way, OS&Y
-150ºC - 1500ºC
Oil and gas pipeline
Equipped with a professional factory, Naibang Valve is a professional manufacturer and supplier of forged steel check valve flanged in China. If you want to buy quality product of various beautiful bags, you can get it at a cheap price from us.