amy@tobo-group.com

ASTM A351 CF8M STAINLESS STEEL THREADED CHECK VALVE, 316SS FLANGE CHECK VALVE​

Check valves are automatic valves that open with forward flow and close with reverse flow.

• Swing Type
• Working pressure: 200psi WOG
• Body: ASTM A351 Gr. CF8M
• Disc: ASTM A351 Gr. CF8M
• Packing: PTFE
• End Connections: Female NPT Threaded

Details:
Size: DN80
Pressure: PN25
Body/Bonnet: A216 WCB
Disc:A216 WCB+13Cr
Seat: A105+13Cr
Bolted Bonnet Design

The pressure of the fluid passing through a system opens the valve, while any reversal of flow will close the valve. Exact operation will vary depending on the type of Check valve mechanism. Most common types of Check valves are swing, lift (piston and ball), butterfly, stop and tilting-disk.


Specifications:
 

Standards:
 

Types of Check valves

Swing Check valve
A basic swing Check valve consists of a valve body, a bonnet, and a disk that is connected to a hinge. The disk swings away from the valve-seat to allow flow in the forward direction, and returns to valve-seat when upstream flow is stopped, to prevent backflow.

The disc in a swing type Check valve is unguided as it fully opens or closes. There are many disk and seat designs available, in order to meet the requirements of different applications. The valve allows full, unobstructed flow and automatically closes as pressure decreases. These valves are fully closed when flow reaches zero, in order to prevent backflow. Turbulence and pressure drop in the valve are very low.