![]() When pressure is from one side, the gate is kept closed a pressure from the other side opens the sluice when a threshold pressure is surpassed. Flap sluice gate A fully automatic type, controlled by the pressure head across it operation is similar to that of a check valve. This ensures that the opening force (on 5) overcomes the closing one (on 6), which causes the gate to turn clockwise and open. The pressure difference on both doors is the same, but the surface area is not. ![]() When the tube to the low water side (3) is opened, the water level in the chamber (4) will fall, and a force will be exerted on the large door (5) in the opening direction (clockwise). However, the smaller gate (6) has a higher level on the upstream side, which exerts a force to close the gate (counter-clockwise). As there is no height difference across the larger gate (5), it exerts no force. ![]() When the tube to the high water level side (1) is opened, the water level in the chamber (4) will rise to this same level. Only one gate may be opened at a timeģ: Tube connecting the chamber to the low water side of the sluiceĤ: The chamber in which the water level can be controlled Main article: Gate valve Plan view of a fan sluice (flow from bottom to top of diagram) (Note: gray areas are the inner empty spaces that water can flow)ġ: Tube connecting the chamber to the high water side of the sluiceĢ: Gates to regulate the water level in the chamber. A flap sluice, however, operates automatically, without external intervention or inputs. This may be a simple, hand-operated, chain pulled/lowered, worm drive or rack-and-pinion drive, or it may be electrically or hydraulically powered. Usually, a mechanism drives the sluice up or down. When a sluice is lowered, water may spill over the top, in which case the gate operates as a weir. "Sluice gate" refers to a movable gate allowing water to flow under it. The terms sluice, sluice gate, knife gate, and slide gate are used interchangeably in the water and wastewater control industry. A mill race, leet, flume, penstock or lade is a sluice channeling water toward a water mill. It can also be an open channel which processes material, such as a river sluice used in gold prospecting or fossicking. ![]() A sluice gateĪ sluice ( / s l u s/ SLOOS) is a water channel containing a sluice gate, a type of lock to manage the water flow and water level. For the linguistic phenomenon, see sluicing. ![]()
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