The opening and closing part of the knife gate valve is the gate, and the movement direction of the gate is perpendicular to the direction of the fluid. The knife gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. Knife gate valve is mainly composed of valve body, O-ring, gate, valve stem, bracket and other components. The knife gate valve adopts the integrated structure of the wafer, which is small in size and light in weight; the completely open channel can prevent the deposition of the medium in the valve, and the replaceable sealing structure is adopted to solve the problem of difficult maintenance of ordinary slurry valves and knife gate valves. The valve body material is changed from traditional cast steel to ductile iron, which has better corrosion resistance and effectively prolongs the service life.

The gate of the knife gate valve has two sealing surfaces. The two sealing surfaces of the most commonly used mode gate valve form a wedge shape. The wedge angle varies with the valve parameters, usually 50. The gate of the wedge type knife gate valve can be made into a The whole is called a rigid gate; it can also be made into a gate that can produce a small amount of deformation to improve its manufacturability and make up for the deviation of the sealing surface angle during processing. This gate is called an elastic gate when the knife gate valve is closed. , the sealing surface can be sealed only by the medium pressure, that is, relying on the medium pressure to press the sealing surface of the gate to the valve seat on the other side to ensure the sealing of the sealing surface, which is self-sealing. Most knife gate valves are forced to seal, that is, when the valve is closed, the gate must be forced to the valve seat by external force to ensure the tightness of the sealing surface.

Knife gate valve application range:

Knife gate valve has a good shearing effect due to the knife gate, and is most suitable for difficult-to-control fluids such as slurry, powder, fiber, etc. It is widely used in papermaking, petrochemical, mining, drainage, food and other industries. Knife gate valves have a variety of valve seats to choose from, and can be equipped with electric devices or pneumatic actuators according to on-site control requirements to realize automatic valve operation.