Large diameter gate valves use the most high quality nodular cast iron or carbon steel casting and become, have high strength, light weight, the characteristics of the precise geometric size, disc has in terchangeable Function, the spiral bevel gears energy agency,  a person can very easily switch, can also according to the requirements of customers, open and close the instructions column, or electric, pneumatic holdLine organization.Seal antirust function is admirable, safe, reliable, and long service life. But vertical or horizontal installation, widely used in watersupply and  drainage system, sewage treatment system, municipalConstruction and mining,metallurgical, power plant and other industries.