Penstock Gate Valves

gate valves
A valve with a sliding part that controls the extent of the aperture
(GATE VALVE) A two-way valve that may be opened or closed to block the flow of fluid in a passage. Normally manually operated, but may be automated, especially for larger sizes.
(Gate valve) A gate valve, also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid.
(Gate valve) A valve with a circular-shaped closing element that fits securely over an opening through which water flows. A valve that utilizes a disc moving at a right angle to the flow to regulate the rate of flow. When a gate valve is fully opened, there is no obstruction to the flow.

penstock
A channel for conveying water to a waterwheel or turbine
sluicegate: regulator consisting of a valve or gate that controls the rate of water flow through a sluice
A penstock is a sluice or gate or intake structure that controls water flow, or an enclosed pipe that delivers water to hydraulic turbines and sewerage systems. It is a term that has been inherited from the technology of wooden watermills.
gate or sluice used in controlling the flow of water; a tube or trough for carrying water to a water wheel.
A sluice or floodgate for regulating the flow of a body of water