Valve
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A valve is a device or natural object that regulates, directs or controls the flow of a fluid by opening, closing, or partially obstructing various passageways. Valves are technically fittings, but ar
These water valves are operated by rotary handles.
Valve disc
The shut off butterfly valve for a Francis turbine at Gordon Power Station, Tasmania
Ball valve
Check valve
Videos
A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid to flow through it in only one direction.
Valve
…fluid (gas or liquid) flow in one direction, but is pushed up by the flow itself when the flow is moving in the opposite direction. This is called a check valve, as it prevents or "checks" the flow in one direction. Modern control valves may regulate pressure or flow downstream and operate on sophisticated…
Tilting-disc inconel check valve
Vertical lift check valve
A disassembled poppet check valve
Large butterfly check valve for a water pump