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  2. Gate valve - Wikipedia

    en.wikipedia.org/wiki/Gate_valve

    Gate valves may have flanged ends drilled according to pipeline-compatible flange dimensional standards. Gate valves are typically constructed from cast iron, cast carbon steel, ductile iron, gunmetal, stainless steel, alloy steels, and forged steels. All-metal gate valves are used in ultra-high vacuum chambers to isolate regions of the chamber ...

  3. Valve - Wikipedia

    en.wikipedia.org/wiki/Valve

    According to API Standards 600, "Steel Gate Valve-Flanged and Butt-welding Ends, Bolted Bonnets", the trim consists of stem, seating surface in the body, gate seating surface, bushing or a deposited weld for the backseat and stem hole guide, and small internal parts that normally contact the service fluid, excluding the pin that is used to make ...

  4. Tap (valve) - Wikipedia

    en.wikipedia.org/wiki/Tap_(valve)

    Usually, when the handle is in line with the pipe the valve is open, and when the handle is across the pipe it is closed. But it could move in either direction CW or CCW perpendicular to the pipe. S=shut and O=open. A cone valve consists of a shallowly tapering cone in a tight-fitting socket placed across the flow of the fluid.

  5. Cheater bar - Wikipedia

    en.wikipedia.org/wiki/Cheater_bar

    "Use the approved tool for the job. Makeshift arrangements such as the use of a screwdriver as a chisel, a pair of pliers as a wrench, a wrench as a hammer, or overloading a wrench by using a pipe extension (cheater bar) on the handle are not to be employed." [4]

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  7. Scuba cylinder valve - Wikipedia

    en.wikipedia.org/wiki/Scuba_cylinder_valve

    A valve cage is often made of stainless steel, [34] and some designs can snag on obstructions and lines. ... Extension handle. A valve knob extension (slob knob) is a ...