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  2. Check valve - Wikipedia

    en.wikipedia.org/wiki/Check_valve

    Swing check valve opening and closing. A swing check valve (or tilting disc check valve) is a check valve in which the disc, the movable part to block the flow, swings on a hinge or trunnion, either onto the seat to block reverse flow or off the seat to allow forward flow. The seat opening cross-section may be perpendicular to the centerline ...

  3. Valve - Wikipedia

    en.wikipedia.org/wiki/Valve

    A 4-port valve is a valve whose body has four ports equally spaced round the body and the disc has two passages to connect adjacent ports. It is operated with two positions. It can be used to isolate and to simultaneously bypass a sampling cylinder installed on a pressurized water line.

  4. File:Swing Check Valve Opening and Closing.webm - Wikipedia

    en.wikipedia.org/wiki/File:Swing_Check_Valve...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  5. List of valves - Wikipedia

    en.wikipedia.org/wiki/List_of_valves

    Double beat valve; Double check valve; Duckbill valve; Fill and drain valve: a valve used in space and missile industry which achieves extremely tight leakage, while providing redundant inhibits against external leakage [1] Flapper valve; Flow divider valve: a valve providing a plurality of output flows from a single fluid source [2]

  6. Plastic pipework - Wikipedia

    en.wikipedia.org/wiki/Plastic_pipework

    Valves are moulded and also come in many types: ball valves (also multiport valve), butterfly valves, spring-, ball-, and swing-check non-return valves, diaphragm valves, knife gate valve, globe valves and pressure relief/reduction valves. Accessories are solvents, cleaners, glues, clips, backing rings, and gaskets.

  7. Glossary of firefighting equipment - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_firefighting...

    Outside stem and yoke valve (OS&Y) Type of gate valve actuator arranged such that the valve stem moves in and out of the handle, thus externally indicating whether the valve is open or shut, unlike the more common gate valve wherein the stem rotates and only the gate moves up and down inside the fixture. Oxyacetylene cutting torch

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