Main Feature It is opened or closed by the valve clack moving to-and-fro through the valve body guiding axle under the spring effect. The valve body passageway is designed in a wing-shaped streamline type, allowing the medium to flow through the passageway rapidly and steadily with no noise. It...
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" - 48" （DN15 - DN1200）
150LB - 2500LB (PN16 - PN420)
socket welding or inner screwed
-29ºC - 425ºC
Oil and gas pipeline
High tensile strength
Longer service life
Equipped with a professional factory, Naibang Valve is a professional manufacturer and supplier of non slam check valve in China. If you want to buy quality product of various beautiful bags, you can get it at a cheap price from us.