Knife gate valve, also known as knife gate valve, knife gate gate valve, slurry valve, slurry valve, its opening and closing member is the gate, gate movement direction perpendicular to the direction of the fluid, relying on the knife blade-shaped gate can cut fiber materials to cut off the medium, gate has two sealing surfaces, the most commonly used mode gate valve two sealing surfaces form a wedge, wedge angle varies with the parameters of the valve, usually 5 °, wedge-type knife gate valve can be made into a gate, called rigid gate; can also be made to produce a small amount of deformation of the gate to improve its processability, to make up for the deviation of the sealing surface angle produced in the processing process, this is called elasticity gate. The wedge knife gate valve can be made into a whole, called the rigid gate; can also be made to produce a small amount of deformation of the gate, in order to improve its manufacturability, to make up for the angle of the sealing surface in the processing of the deviation, this gate is called elastic gate. There is no chamber in the valve body, the gate plate is lifted in the side guide groove, and the lugs at the bottom are tightly pressed on the valve seat, if you need to achieve a high media sealing, you can choose the O-shaped sealing seat to realize the bidirectional sealing. Knife gate valve has a smaller installation space, low working pressure, not easy to accumulate debris, lower price.