Gate Valves
Gates Valves (als known as Sluice Valves), are valves which open by lifting a rectangular or round wedge/gate out of the path of the fluid. The distinct feature of gate valves are the sealing surfaces between the gate and seats are planar. Because of this gate valves are often used when a straight-line flow of fluid and minimum restriction is desired. Gate valves are designed for fully open or fully closed service. They are installed in pipelines as isolating valves, and should not be used as control or regulating valves. Operation of a gate valve is performed doing an either clockwise to close (CTC) or clockwise to open (CTO) rotating motion of the stem. When operating the valve stem, the gate moves up- or downwards on the threaded part of the stem.
