Gate Valve is a kind of valve that moves vertically along the center line of a passage. It is mainly used for full-open or full-close operation in the pipeline system, and cannot be used for regulation or throttling. The opening and closing part of the gate valve is the gate plate, and the direction of movement is perpendicular to the direction of the fluid. Gate valves are sealed by contact between the seat and the gate plate. The sealing surface is usually surfacing with metal material for increased wear resistance
