Knife - type flanged gate valve PZ573W

Knife gate valve from the eighties into China, in less than two decades, the use of its scope from the general field expanded to a wider range of industries, from the mine power plant coal preparation, waste rock, slagging, to the development The city's sewage treatment, from the general industrial pipeline to the development of food, health, medicine and other professional pipeline system.

 Knife gate valve, slurry gate valve, mud valve, and its opening and closing pieces of the gate, the direction of movement of the gate and the direction of the fluid perpendicular to the fiber material can be cut by the blade-shaped gate To cut off the media, the gate has two sealing surface, the most common mode of the two gate valve sealing surface to form a wedge, wedge angle varies with the valve parameters, usually 50, wedge-type knife gate valve can be made A whole, called the rigid gate; can also be made to produce micro-deformation of the gate to improve its technology to make up the sealing surface angle in the process of deviation, the gate is called the elastic gate. The valve body does not actually exist in the chamber, the gate in the side of the guide slot lift, and by the bottom of the lug pressed against the valve seat, to achieve a higher medium sealing, the optional O-shaped seat to achieve Two-way seal. Knife gate valve with a smaller installation space, low working pressure, difficult to accumulate debris, the price is low.

Knife-type gate valve is closed, the sealing surface can only rely on the media pressure to seal, that is, relying on the media pressure to seal the sealing surface to the other side of the valve seat to ensure the sealing surface of the seal, which is self- Gate valve is a mandatory seal, that is, the valve is closed, to rely on external force to force the gate pressure to the seat in order to ensure the sealing surface of the seal. This type of valve in the pipeline should generally be installed vertically.

Knife-type gate valve drive: manual, sprocket, electric, pneumatic, hydraulic, bevel gears, hydraulic and hydraulic control and other driving methods. Knife gate valve shape: open rod, dark rod two. Knife gate valve material: cast iron, cast steel, carbon steel, stainless steel, lining fluorine. Knife-type gate valve seal: hard seal, soft seal, single-sided seal, double-sided seal and other materials sealed.

Ultra-thin knife gate valve with its small size, flow resistance is small, light weight, easy to install, easy to disassemble and so on to solve the general gate valve, flat gate valve, ball valve, stop valve, regulating valve, butterfly valves and other valves flow resistance , Weight, installation is difficult, covers an area of large and so difficult problems. Knife gate valve appears, a large number of general-purpose cut off valves and regulating valves have been replaced. Today, the world's largest amount of knife gate valve is the United States and Japan.