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  2. Impact wrench - Wikipedia

    en.wikipedia.org/wiki/Impact_wrench

    Impact wrench. A 1/2" drive pistol-grip air impact wrench. An impact wrench (also known as an impactor, impact gun, air wrench, air gun, rattle gun, torque gun, windy gun) is a socket wrench power tool designed to deliver high torque output with minimal exertion by the user, by storing energy in a rotating mass, then delivering it suddenly to ...

  3. Cheater bar - Wikipedia

    en.wikipedia.org/wiki/Cheater_bar

    Cheater bars are usually used to free threaded pipe, screws, bolts, and other fasteners that are difficult to remove with a ratchet or pipe wrench alone. They are also commonly used to operate valves. When the handle of a pipe wrench, box wrench or ratchet is inserted into a cheater bar, the additional distance makes it possible to generate the ...

  4. Backflow - Wikipedia

    en.wikipedia.org/wiki/Backflow

    Backflow is a term in plumbing for an unwanted flow of water in the reverse direction. [1] It can be a serious health risk for the contamination of potable water supplies with foul water. In the most obvious case, a toilet flush cistern and its water supply must be isolated from the toilet bowl. For this reason, building codes mandate a series ...

  5. Torque multiplier - Wikipedia

    en.wikipedia.org/wiki/Torque_multiplier

    A torque multiplier is generally used when there are space limitations that disallow the use of long handles. They are also used as a safer alternative to a cheater bar as lever length and operator effort are both reduced. Finally, torque multipliers allow for more accurate torque. By reducing the amount of effort needed to tighten, a torque ...

  6. Pinch valve - Wikipedia

    en.wikipedia.org/wiki/Pinch_valve

    Pinch valves employ an elastic tubing (sleeve/hose) and a device that directly contacts the tubing (body). Forcing the tubing together creates a seal that is equivalent to the tubing's permeability. [1] Air-operated pinch valves consist of an elasticised reinforced rubber hose, a type of housing, and two socket end covers (or flanges).

  7. Pneumatic actuator - Wikipedia

    en.wikipedia.org/wiki/Pneumatic_actuator

    Pneumatic rack and pinion actuators for valve controls of water pipes. A pneumatic actuator mainly consists of a piston or a diaphragm which develops the motive power. It keeps the air in the upper portion of the cylinder, allowing air pressure to force the diaphragm or piston to move the valve stem or rotate the valve control element.