How do dam sluice gates work?

A fully automatic type, controlled by the pressure head across it; operation is similar to that of a check valve. It is a gate hinged at the top. 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.

What is a sluice in a dam?

Dams commonly use sluices to help control the flow of water. A sluice is a channel, natural or human made, controlled with a gate and used to direct water to a desired location. The sluice consists of a long channel, allowing water to flow in a given direction when the gate is released.

How do sluices work?

Sluice boxes work by essentially creating a straight, consistent channel, with regularly spaced slow spots created by riffles. Each riffle creates an eddy, a backflow of water that allows the gold to settle out. Material is placed at the top of the box and carried in suspension down the channel.

What is sluice gate valve?

Sluice gates are true end of line valves, designed to hold back water with minimal leakage in applications ranging from drainage pipes to effluent ponds to distributor boxes.

What is the difference between a sluice gate and a slide gate?

Sluice gates only seal on one side, typically a cast iron gate with brass “wedges” that force the face of the gate against the frame where a brass face on the frame and gate seal against eachother. On a slide gate typically made of stainless steel, a flat plate “gate” slides inside two channels in the frame.

How do floodgates prevent floods?

Floodgates are built at the end of storm sewers. During high water, floodgates prevent river water from backing through the sewer into the cities. MCD maintains and operates 185 floodgates of the estimated 237 total floodgates within the system, and inspects each of its gates annually.

How do drum gates work?

A drum gate consists of a hollow steel structure, hinged on the upstream side that floats in a bath of water contained within a float chamber bounded by reinforced concrete walls. These gates are unique in that the gates are lowered to release water, with water flowing over the top of the gates.

Is gate valve a control valve?

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. When operating the valve stem, the gate moves up- or downwards on the threaded part of the stem.