The opening and closing part of a gate valve is the gate plate. The movement direction of the gate plate is
perpendicular to the fluid direction. A gate valve can only be fully open or fully closed and cannot be used for
regulation or throttling. The gate has two sealing surfaces. In the most commonly used mode gate valve, the two
sealing surfaces form a wedge. The wedge Angle varies with the valve parameters and is usually 50 °.
When the medium temperature is not high, it is 2°52'. The gate plate of the wedge gate valve can be made into
an integral body, which is called a rigid gate plate. It can also be made into a gate plate that can undergo slight deformation
to improve its processability and compensate for the deviation of the sealing surface Angle during the processing. This type
of gate plate is called an elastic gate plate.