Gate Valve Types: Electric Gate Valve, Manual Gate Valve, Pneumatic Gate Valve. The electric gate valve has a circular opening of the same size as the passage diameter on the gate plate, allowing for complete disconnection and alignment with the passage diameter through the opening and closing of the gate plate. Nominal Passage Diameter Range: DN50-DN500, Nominal Pressure Range: 1.0MPa-1.6MPa. Material: Cast Steel, Stainless Steel; Gate Plate Material: 2Cr13, 201, 304, 316, 316L. Connection Type: Clamp Type; Valve Seat Seal: Nitrile Rubber, EPDM Rubber, Fluororubber; Hardfacing: 2Cr13, Stainless Steel, Hard Alloy; Packing Seal: Graphite Packing, PTFE Packing. Contact Phone: 13376026317/13376026312, Welcome Your Visit! The manual gate valve, also known as the manual spiral gate valve, is mostly used with卸料器 (unloader) and comes in square and round mouth types. The electric gate valve design should match the unloader shape. Manual gate valves are durable, have low flow resistance, small size, light weight, easy maintenance, and are widely used. The sealing structure of the electric gate valve can be soft seal or hard seal. They feature good workability and compact structure, with an adjustable seat design for wear resistance and automatic compensation, thus extending the lifespan. Pneumatic gate valves are the main control equipment for flow or conveyance volume of powdered, granular, granular, and small piece materials, widely used in metallurgy, mining, building materials, grain, chemical industries for controlling flow changes or quickly cutting off flow.