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  2. Liquid-ring pump - Wikipedia

    en.wikipedia.org/wiki/Liquid-ring_pump

    Single-stage vacuum pumps typically produce vacuum to 35 torr (mm Hg) or 47 millibars (4.7 kPa), and two-stage pumps can produce vacuum to 25 torr, assuming air is being pumped and the ring-liquid is water at 15 °C (59 °F) or less. Dry air and 15 °C sealant-water temperature is the standard performance basis, which most manufacturers use for ...

  3. Centrifugal pump - Wikipedia

    en.wikipedia.org/wiki/Centrifugal_pump

    Centrifugal pumps that are not designed with an internal or external self-priming stage can only start to pump the fluid after the pump has initially been primed with the fluid. Sturdier but slower, their impellers are designed to move liquid, which is far denser than air, leaving them unable to operate when air is present. [ 11 ]

  4. Impeller - Wikipedia

    en.wikipedia.org/wiki/Impeller

    Several different types of pump impellers Flexible impeller of cooling system pump of an outboard engine (1 euro cent coin for comparison, diameter 16.25 mm). An impeller is a rotating component of a centrifugal pump that accelerates fluid outward from the center of rotation, thus transferring energy from the motor that drives the pump to the fluid being pumped.

  5. Electromagnetic pump - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_pump

    An electromagnetic pump is a pump that moves liquid metal, molten salt, brine, or other electrically conductive liquid using electromagnetism. A magnetic field is set at right angles to the direction the liquid moves in, and a current is passed through it. This causes an electromagnetic force that moves the liquid.

  6. Condensate pump - Wikipedia

    en.wikipedia.org/wiki/Condensate_pump

    Condensate pumps may be used to pump the condensate produced from latent water vapor in any of the following gas mixtures: Conditioned (cooled or heated) building air; Refrigerated air in cooling and freezing systems; Steam in heat exchangers and radiators; The exhaust stream of very-high-efficiency furnaces

  7. Air lock - Wikipedia

    en.wikipedia.org/wiki/Air_lock

    If the water flow velocity is below the rising velocity of air bubbles, then water trickles down to the low point Lo2 and traps the remaining air between Hi1 and Lo2. As more water flows down, the upward leg Lo2 to Hi2 fills up. This exerts a pressure on the trapped air of either H2 m of water (WG = water gauge) or H1, whichever is less. If H2 ...

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