The opening and closing element of the soft seated gate valve is the gate, and the movement direction of the gate is perpendicular to the fluid direction. The gate valve can only fully open and close, and cannot used to adjust and throttle. The gate has two sealing surfaces. The most commonly used mode: the two sealing surfaces of the gate form a wedge, and the wedge angle varies with the valve parameters.
The gate of wedge gate valve can be made into a whole, which is called solid gate valve; It can also be made into a gate that can produce slight deformation to improve its manufacturability and make up for the deviation of the angle of the sealing surface during processing. This gate plate is called flexible gate valve.