Gate valve

A gate valve, also known as a sluice valve, is a valve that opens by lifting a barrier (gate) out of the path of the fluid. Gate valves require very little space along the pipe axis and hardly restrict the flow of fluid when the gate is fully opened. The gate faces can be parallel but are most commonly wedge-shaped (in order to be able to apply pressure on the sealing surface).A 2″ stainless steel gate valve with flanged ends. Bolts connect the lower valve body with the upper “bonnet”. Visible threads on the valve stem protruding above the handwheel show that this is a rising-stem valve.Stainless steel No return valveInconel gate valve castingCryogenic 254 SMO gate valveCryogenic super duplex gate valve frozen up during operationNuts and bolts for incoloy valvesGate valve being installed on a new water service to a fire hydrant. The valve material is ductile iron.Gate valves A gate valve, also known as a sluice valve, is a valve that opens by lifting a barrier (gate) out of the path of the fluid. Gate valves require very little space along the pipe axis and hardly restrict the flow of fluid when the gate is fully opened. The gate faces can be parallel but are most commonly wedge-shaped (in order to be able to apply pressure on the sealing surface). Gate valves are used to shut off the flow of liquids rather than for flow regulation. When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low flow resistance. The size of the open flow path generally varies in a nonlinear manner as the gate is moved. This means that the flow rate does not change evenly with stem travel. Depending on the construction, a partially open gate can vibrate from the fluid flow.