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  2. Pressure regulator - Wikipedia

    en.wikipedia.org/wiki/Pressure_regulator

    In a no pressure situation, where water could flow backwards, it won't be impeded. A water pressure regulating valve does not function as a check valve. [citation needed] [clarification needed] They are used in applications where the water pressure is too high at the end of the line to avoid damage to appliances or pipes.

  3. Hymatic - Wikipedia

    en.wikipedia.org/wiki/Hymatic

    It began making air compressors , [5] anti-g valves, [6] pressure reducing valves, stop valves and fuel system relief valves. [7] [8] Most well-known British aircraft in the 1950s and 1960s contained their valves and pneumatic equipment. It developed the fuel system for Concorde. [9] [10] Concorde carried around 22,000 gallons of fuel. Concorde ...

  4. List of valves - Wikipedia

    en.wikipedia.org/wiki/List_of_valves

    Pressure regulator or pressure reducing valve (PRV): reduces pressure to a preset level downstream of the valve; Pressure sustaining valve, or back-pressure regulator: maintains pressure at a preset level upstream of the valve; Presta valve, Schrader valve, or Dunlop valve, holds the air inside bicycle tires; Pulse valve, extremely fast pulsing ...

  5. Relief valve - Wikipedia

    en.wikipedia.org/wiki/Relief_valve

    A relief valve DN25 on cooling water pipe from heat exchanger Schematic diagram of a conventional spring-loaded pressure relief valve. A relief valve or pressure relief valve (PRV) is a type of safety valve used to control or limit the pressure in a system; excessive pressure might otherwise build up and create a process upset, instrument or equipment failure, explosion, or fire.

  6. Reduced pressure zone device - Wikipedia

    en.wikipedia.org/wiki/Reduced_pressure_zone_device

    A reduced pressure zone device (RPZD, RPZ, or RPZ valve) is a type of backflow prevention device used to protect water supplies from contamination. RPZDs may also be known as reduced pressure principle (RP), reduced pressure principle backflow prevention devices , [ 1 ] [ 2 ] reduced pressure zone assemblies (RPZA), [ 3 ] or reduced pressure ...

  7. Valve actuator - Wikipedia

    en.wikipedia.org/wiki/Valve_actuator

    Hydraulic pressure can be supplied by a self-contained hydraulic pressure pump. In some applications, such as water pumping stations, the process fluid can provide hydraulic pressure, although the actuators must use materials compatible with the fluid. Electric valve actuator mounted on a pressure reducing needle valve.

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