Xiamen Dervos Valves Industry Co., Ltd

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Gate Valve Application Conditions And Actions
- Jan 23, 2017 -

Gate valve is closed (the gate) along the path perpendicular to the center line of the valve in direction. Can only be fully open and fully closed gate valve in the pipeline shut off, can't regulate and throttle. Gate valve is a valve used a wide range of General diameter DN ≥ 50mm cutting device is used it, sometimes bore very small cutting device selection valve.
There are two gate sealing surface, two of the most commonly used mode of gate valve sealing surface to form wedge-shaped, wedge-shaped angle with the valve parameters vary, usually 50, medium temperature not higher to 2 ° 52'. Wedge gate valve's gate can be made into a group, called rigid disc; also can be made to produce micro-deformation of the gate, in order to improve its technology, cover sealing surface angle of deviation in the process, the gate is called elastic plate.
When the gate is closed, can only rely on the media pressure on the sealing surface is sealed, that rely on media pressure will press the seal into the other side of the gate to ensure that the sealing surfaces of the valve seat seal, this seal is. Most of the gate is the forced seal, that is when the valve is closed, relying on external forces forced the Rams to seat, to ensure that the sealing surface of the sealing.
Gate valve gate valve with linear motion, called the shower valve (also called rising stem gate valves). Usually with trapezoidal threaded on the lift rod through the nut at the top of the valve guides and valve body, turn the rotary motion into linear motion, thrust or torque turn operation.