Applicable occasions and structures of gate valves

The opening and closing component of a gate valve is a gate plate, and the direction of movement of the gate plate is perpendicular to the direction of the fluid. A gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve has two sealing surfaces, and the most commonly used mode gate valve has two sealing surfaces that form a wedge shape. The wedge angle varies with the valve parameters, usually 50, and when the medium temperature is not high, it is 425 ℃. The gate of a wedge gate valve can be made as a whole, called a rigid gate; It can also be made into a gate that can produce slight deformation to improve its processability and compensate for the deviation of the sealing surface angle during the processing. This type of gate is called an elastic gate.The main gate valves product names of China gate Valve Network include:API Cryogenic Gate Valve,API Flange Gate Valve,Bevel Gear Slurry ValveElectric Rising Stem Double Disc Parallel Gate Valve,Electric Non-rising Stem Single Disc Wedge Gate Valve,Electric Rising Stem Single Disc Wedge Gate Valve

When the valve is opened, when the lifting height of the gate is equal to 1:1 times the valve diameter, the fluid channel is completely unobstructed, but this position cannot be monitored during operation. In actual use, the vertex of the valve stem is used as a marker, that is, the position where it cannot be opened, as its fully open position. To consider the phenomenon of locking due to temperature changes, it is usually done by opening the valve to the top position and then reversing it by 1/2-1 turn as the position for fully opening the valve. Therefore, the fully open position of the valve is determined by the position of the gate (i.e. stroke).

Some gate valves have the stem nut set on the gate plate, and the handwheel rotates to drive the stem to rotate, thereby lifting the gate plate. This type of valve is called a rotary stem gate valve or a concealed stem gate valve

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