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Super small diameter cast iron slap door
Super small diameter cast iron slap door

Such as bottom valve, spring spring type, Y-type and other check valves, the raw materials of the modified check valve are cast iron, stainless steel, brass, PVC, PPR, and the effect of the modified check valve is to allow the medium to move in one direction. And to prevent movement in the opposite direction, generally this kind of valve is active, under the effect of fluid pressure moving in one direction.

Closed disc, a valve used to avoid medium backflow, also known as check valve, one-way valve, reverse flow valve, and back pressure valve. Check valve is an active valve. Its main effect is to avoid medium backflow, avoiding pumps and To drive the motor to rotate, and to discharge the container medium, the check valve can also be used to supply the auxiliary system whose pressure may rise above the system pressure.

The valve is actively opened to discharge the gas to reduce the overpressure in the device to avoid damage to the container or pipeline. When the pressure in the container drops to the normal operating pressure, it is actively closed to prevent all the gas from being discharged due to the overpressure of the container, which will cause spoilage and interruption of production. , The valve is mainly composed of three parts: valve seat, valve disc (spool) and loading mechanism.

It is used to support the fully closed position of the valve core and form a sealing pair. Generally, the diameter of the valve seat is the diameter of the valve flow. For example, the valve seat materials of butterfly valves are very wide. : EPDM, NBR, NR, PTFE, PEEK, PFA, SS315, STELLITE, etc.

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