Manual side opening gate valve (manual flapper valve) is one of the closing of material necessities, maintenance equipment. Often applied to powdered materials, small bulk materials, granular materials, and so on. Environmental protection, metallurgy, chemical industry, food, food and other industries to provide a great convenience. Manual gate valve made of high quality carbon steel welded, widely used in metallurgy, carbon, chemicals, building materials and other industries. Flue gas piping system used for flue gas cleaning system regulation, switching effect. Compact manual flapper valve structure, wear, small amount of leakage, a simple, flexible movement, effort, etc., can work under normal temperature, high dust, magnetic environment. Manual gate valve is usually divided into two types, that is, in fact, spout into a round mouth and square mouth. Customers in the selection of equipment is mainly based on the time that you use to complete the selection. Bao Cheng Machinery production flapper valve, cast iron castings, thus increasing its thickness and thus prolong its life, and beautiful appearance. It is mainly used in chemical, food, food, environmental protection and other industries. The machine running smoothly, low noise, less failure, easy disassembly. 0317-8226445 15612792509 QQ 2498762315 Liu Ying sales manual gate valve series has the following advantages: 1, the opening and closing speed. 2, the operation is simple: open and close the device to achieve a clean lubricated drive, eliminating the dust, rust effect on the drive, ensure gate operation saves time and effort. 3, closed tight: the junction of the screw and cylinder with double dust ring, thus sealing strict, no dust, long life. 4, temperature: Seals selection of high heat resistant material, in the cement or fly ash at temperatures up to 125 ℃ able to ensure proper operation.