Soft-sealed gate valve principle: Soft-sealed gate valve is divided into two types: open-rod soft-sealed gate valve and dark-rod soft-sealed gate valve. Usually, there is a trapezoidal thread on the lift rod. Through the nut in the middle of the gate and the guide groove on the valve body, the rotary motion is changed into a linear motion, that is, the operating torque is changed into the operating thrust. When the valve is opened, when the lift height of the gate is equal to 1:1 times the diameter of the valve, the fluid channel is completely unblocked, but this position cannot be monitored during operation. In actual use, the apex of the valve stem is used as a sign, that is, the position where it cannot be opened, as its fully open position. In order to consider the lock-up phenomenon due to temperature changes,

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