The gate of the wedge gate valve can be made into a whole, called a steel gate; it can also be made into a gate that can produce a slight deformation to improve its processability and compensate for the deviation of the sealing surface angle during the processing. The shutter is called a resilient shutter.
The soft seal gate valve is divided into two types: open rod soft seal gate valve and dark rod soft seal gate valve. Usually, trapezoidal threads are provided on the lifting rod, and the rotary motion is changed into a linear motion by the nut in the middle of the shutter and the guide groove on the valve body, that is, the operating torque is changed to the operating thrust. When the valve is opened, when the lifting height of the shutter is equal to 1:1 times the diameter of the valve, the passage of the fluid is completely unblocked, but this position cannot be monitored during operation. In actual use, the apex of the valve stem is used as a mark, that is, the position where the valve is opened, as its fully open position. In order to consider the temperature change, the lock phenomenon is usually turned on to the apex position, and then back to 1/2-1 turn as the position of the fully open valve. Therefore, the fully open position of the valve is determined by the position of the gate (ie stroke). This type of valve should generally be installed horizontally in the pipeline.