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  2. Pressure switch - Wikipedia

    en.wikipedia.org/wiki/Pressure_switch

    Uses of pneumatic pressure switches include: Switch a household well water pump automatically when water is drawn from the pressure tank. Switching off an electrically driven gas compressor when a set pressure is achieved in the reservoir; Switching off a gas compressor, whenever there is no feed in the suction stage. in-cell charge control in ...

  3. Dry running protection - Wikipedia

    en.wikipedia.org/wiki/Dry_running_protection

    Dry running protection, also known as dry-run protection or dry-running protection, is a type of protection mechanism to prevent a rotor, pump or stirrer shaft from operating without any medium added, as the bearing and shaft seal might be damaged if the motor is run while dry. [1]

  4. Condensate pump - Wikipedia

    en.wikipedia.org/wiki/Condensate_pump

    Large industrial pumps may also serve as the feedwater pump for returning the condensate under pressure to a boiler. Condensate pumps usually run intermittently and have a tank in which condensate can accumulate. Eventually, the accumulating liquid raises a float switch energizing the pump. The pump then runs until the level of liquid in the ...

  5. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    A safety valve allows water to escape from the system when pressure becomes too high, and a valve can open to replenish water from the normal water supply if the pressure drops too low. Sealed systems offer an alternative to open-vent systems, in which steam can escape from the system, and gets replaced from the building's water supply via a ...

  6. Pressure tank - Wikipedia

    en.wikipedia.org/wiki/Pressure_tank

    The pressure switch turns the water pump on when it senses a pressure that is less than P lo and turns it off when it senses a pressure greater than P hi. While the pump is on, the pressure tank fills up. The pressure tank is then depleted as it supplies water in the specified pressure range to prevent "short-cycling", in which the pump tries ...

  7. Booster pump - Wikipedia

    en.wikipedia.org/wiki/Booster_pump

    They may be constant speed pumps which switch on when pressure drops below the low pressure set-point and switch off when pressure reaches the high set-point, or variable speed pumps which are controlled to maintain a constant output pressure. Constant speed pumps are switched on by a normally closed low-pressure switch and will content to run ...

  8. Oil well control - Wikipedia

    en.wikipedia.org/wiki/Oil_well_control

    Pump pressure, which is also referred to as system pressure loss, is the sum total of all the pressure losses from the oil well surface equipment, the drill pipe, the drill collar, the drill bit, and annular friction losses around the drill collar and drill pipe. It measures the system pressure loss at the start of the circulating system and ...

  9. Pumpjack - Wikipedia

    en.wikipedia.org/wiki/Pumpjack

    A pumpjack is the overground drive for a reciprocating piston pump in an oil well. [1] It is used to mechanically lift liquid out of the well if there is not enough bottom hole pressure for the liquid to flow all the way to the surface. The arrangement is often used for onshore wells. Pumpjacks are common in oil-rich areas.

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