Forged Check Valve 
 I. Overview of forged steel valve 
 Forged check valve is the rely on the flow of the medium itself automatically open and close the valve, the valve is used to prevent the media back, also known as check valve, check valve, reflux valve, and back pressure valve. Check Valve is an automatic valve, and its main role is to prevent the media back, to prevent reverse pump and drive motor, and discharge the container media. Check the pressure of which can also be used to exceed the system pressure may rise to the auxiliary system supplies the pipeline. Check valve can be divided into swing check valve (center of gravity by rotation) and lift check valves (along the axis of movement). 

 Forged steel check valve has three valve cover design, the first one is the valve cover bolts through the convex surface connection, the use of stainless steel and flexible graphite spiral wound gasket, ring joint can be used according to demand, the second valve is welded cover, sealed by welding threaded, demand can also be welded directly to the rigid, and the third is self-sealing valve cover, through the threaded connection with the self-sealing valve cover. 
 There are three different valve design, namely: vertical lift check valve, ball valve and swing check valves. With flange connection, welding and so on! 


 Forged steel valve forged steel valve dimensions 

 Second, forged steel check valve design and specifications 
 Valve manufacturing by MSS SP-118, BS5352, ANSI / ASME B16.34, test and acceptance by API 598, identified in accordance with MSS SP-25. 

 Third, forged steel check valve structure 

 Forged steel valve forged steel valve forged steel screw-type forged steel from the lift 

 1. Full Bore or reduced diameter; 2. Liters check valve 3. Ball valve 4. Swing check valves 5. May require the use of spring assisted reduction 6. With the bolt-type spiral wound gasket valve cover, valve cover screw seal welding, or self-sealing valve cover 7. Socket Weld ANSI / ASME B16.11 8. threaded ends (NPT side) according to ANSI / ASME B1.20.1