Introduction to the working principle of high pressure gate valve
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Release Time：2021-05-21
The opening and closing parts of the high-pressure gate valve are the gate plate. The movement direction of the gate plate is perpendicular to the fluid direction. The gate valve can only be fully opened and fully closed, and cannot be adjusted and throttled. The opening and closing parts of the high-pressure gate valve are the gate plate. The movement direction of the gate plate is perpendicular to the fluid direction. The gate valve can only be fully opened and fully closed, and cannot be adjusted and throttled. The movement of the stem, there are lifting rod type (stem lifting, hand wheel does not lift), there are lifting rotating rod type (hand wheel and stem rotating lift, nut is located on the valve body).
The opening and closing parts of the high-pressure gate valve are the gate plate. The movement direction of the gate plate is perpendicular to the fluid direction. The gate valve can only be fully opened and fully closed, and cannot be adjusted and throttled. The opening and closing parts of the high-pressure gate valve are the gate plate. The movement direction of the gate plate is perpendicular to the fluid direction. The gate valve can only be fully opened and fully closed, and cannot be adjusted and throttled. The movement of the stem, there are lifting rod type (stem lifting, hand wheel does not lift), there are lifting rotating rod type (hand wheel and stem rotating lift, nut is located on the valve body).
The working principle of high pressure gate valve
High pressure gate valve is a forced seal valve, so when the valve is closed, pressure must be applied to the gate to force the sealing surface not to leak. When the medium enters the valve six from below the gate, the resistance that the operating force needs to overcome is the friction force of the valve stem and the packing and the thrust generated by the pressure of the medium. The force of closing the valve is greater than that of opening the valve. The diameter of the valve stem should be large, otherwise the failure of the top bending of the valve stem will occur.
When the high-pressure gate valve is opened, the opening height of the gate is 25% to 30% of the nominal diameter, and the flow has reached the maximum, indicating that the valve has reached the fully open position. Therefore, the fully open position of the gate valve should be determined by the stroke of the gate.
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