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Ball valve is made up of a ball, stem, seat and seal. As the ball rotates, it can move fully closed to fully open. This design allows the ball valve to open and close quickly, so it is common in applications that require rapid fluid flow cutoff.
Gate valve is usually composed of a disc, a stem, seat and a sealing ring. When the valve is closed, a completely sealed passage is formed between the gate and the valve seat to prevent the flow of fluid. When the valve is opened, the gate is lifted to a position to allow the fluid to pass through the valve.
Check valve is usually composed of body, disc ball，a spring and a sealing ring. The disc is usually designed to allow flow in a specific direction of the fluid flow and close to prevent the reverse flow of the fluid when it flows in the reverse direction.
Globe valve is usually composed of body, disc, stem, sealing ring. When the disc moves downward, the valve is closed, and when the valve disc is lifted, the valve opens to allow fluid to pass. The valve seat and valve disc of the globe valve usually have good sealing to ensure that the valve will not leak in the closed state.
When the valve disc rotates, the size of the fluid passage can be adjusted to control the flow of the fluid. The operation of the butterfly valve is usually simple and can be carried out by manual operating device, electric device or pneumatic device.
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