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  2. Pressure regulator - Wikipedia

    en.wikipedia.org/wiki/Pressure_regulator

    Pressure regulator for domestic water supply. Outlet pressure is set with the blue handwheel and shown on the vertical scale. A water pressure regulating valve limits inflow by dynamically changing the valve opening so that when less pressure is on the outside, the valve opens up fully, and too much pressure on the outside causes the valve to shut.

  3. North Penn Water Authority - Wikipedia

    en.wikipedia.org/wiki/North_Penn_Water_Authority

    The North Penn Water Authority (NPWA) is a water utility providing drinking water to portions of Bucks and Montgomery counties in the U.S. state of Pennsylvania, centered around the North Penn Valley region. The NPWA is a municipal authority that is owned by the municipalities that is serves. The NPWA provides drinking water to over 34,000 ...

  4. North Wales Water Authority - Wikipedia

    en.wikipedia.org/wiki/North_Wales_Water_Authority

    The Forest Park Water Treatment Plant began operation on June 21, 1994. An expansion to the Forest Park Water Treatment Plant in 2007 increased the output to 40 million gallons of water a day to keep up with the growing water use of the area. [8] On July 30, 2019, Warrington Township agreed to sell their water system to the NWWA for $17 million ...

  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. Centrifugal governor - Wikipedia

    en.wikipedia.org/wiki/Centrifugal_governor

    The balls swing out as speed increases, which closes the valve, until a balance is achieved between demand and the proportional gain of the linkage and valve. A centrifugal governor is a specific type of governor with a feedback system that controls the speed of an engine by regulating the flow of fuel or working fluid , so as to maintain a ...

  7. Governor (device) - Wikipedia

    en.wikipedia.org/wiki/Governor_(device)

    A governor, or speed limiter or controller, is a device used to measure and regulate the speed of a machine, such as an engine.. A classic example is the centrifugal governor, also known as the Watt or fly-ball governor on a reciprocating steam engine, which uses the effect of inertial force on rotating weights driven by the machine output shaft to regulate its speed by altering the input flow ...