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  2. Butterfly valve - Wikipedia

    en.wikipedia.org/wiki/Butterfly_valve

    A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The "butterfly" is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc ...

  3. Check valve - Wikipedia

    en.wikipedia.org/wiki/Check_valve

    Tilting-disc inconel check valve Check valve symbol on piping and instrumentation diagrams. The arrow shows the flow direction. Vertical lift check valve. A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1]

  4. B16 Standardization of Valves, Flanges, Fittings, and Gaskets

    en.wikipedia.org/wiki/B16_Standardization_of...

    The ASME B16 Standardization of Valves Flanges, Fittings and Gaskets Committee, which operates under ASME ’s Board on Pressure Technology Codes and Standards is responsible for standards covering valves, flanges, pipe fittings, gaskets and valve actuators for use in pressure services. The B16 Standards Committee currently meets once a year in ...

  5. Ball valve - Wikipedia

    en.wikipedia.org/wiki/Ball_valve

    A ball valve is a flow control device which uses a hollow, perforated, and pivoting ball to control fluid flowing through it. It is open when the hole through the middle of the ball is in line with the flow inlet, and closed when it is pivoted 90 degrees by the valve handle, blocking the flow. [ 1] The handle lies flat in alignment with the ...

  6. Waveguide flange - Wikipedia

    en.wikipedia.org/wiki/Waveguide_flange

    A waveguide flange is a connector for joining sections of waveguide, and is essentially the same as a pipe flange —a waveguide, in the context of this article, being a hollow metal conduit for microwave energy. The connecting face of the flange is either square, circular or (particularly for large [ 1] or reduced-height rectangular waveguides ...

  7. Drain-waste-vent system - Wikipedia

    en.wikipedia.org/wiki/Drain-waste-vent_system

    A drain-waste-vent system (or DWV) is the combination of pipes and plumbing fittings that captures sewage and greywater within a structure and routes it toward a water treatment system. It includes venting to the exterior environment to prevent a vacuum from forming and impeding fixtures such as sinks, showers, and toilets from draining freely ...

  8. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    Pipe fittings: 1) Copper (solder); 2) Iron or brass (threaded); 3) Brass (compression); 4) Brass (compression to solder); 5) Brass adapters. PVC fittings. A fitting or adapter is used in pipe systems to connect sections of pipe (designated by nominal size, with greater tolerances of variance) or tube (designated by actual size, with lower ...

  9. Tesla valve - Wikipedia

    en.wikipedia.org/wiki/Tesla_valve

    The filaments ricochet off the periodic structures, deflecting increasingly sharply before being rerouted around the 'islands' and mixing. A Tesla valve, called a valvular conduit by its inventor, is a fixed-geometry passive check valve. It allows a fluid to flow preferentially in one direction, without moving parts.

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