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Reciprocating Pumps - Diaphragm, Piston, Plunger

These pumps have a diaphragm, piston or plunger which is reciprocating back and forth through a fixed stoke length. The diaphragm pumps use a circular semi-flat membrane that is flexed from a concave to a convex shape within a sealed chamber. There is no actual sliding contact of parts in the pumping chamber and therefore these pumps can handle solids, slurries, fibrous and very thick liquids quit well. Most diaphragm pumps are air operated, but electric do exist. Electric models are typically very small with several individual diaphragms working in series being driven by a rotating angled cam or a single diaphragm being driven by a mechanical connection to a solenoid. In this case, they are typically designed as metering pumps. Piston pumps like the name implies have a piston, ceramic typically, reciprocating within a very tight tolerance cylinder. Because of their materials of construction and mechanical design, they produce extremely high discharge pressures. By making them with several pistons working together in a single head a semi-steady flow can be obtained. With any of these pumps special consideration must be given to the cyclic pressure or hydraulic pulsation’s which naturally occur.Typical Positive Displacement Reciprocating pumps include AODD, single diaphragm, electric diaphragm, metering or proportioning and piston to name a few.
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  1. Pulsafeeder

    15 GPD/100 PSI Metering Pump

    015-XA-AAAAXXX

    $832.65
    15 GPD 100 PSI metering pump 115 vac. 25 strokes / minute max. Turn Down Ratio: 10:1
    CHEM-TECH Series 100 Metering Pump 15 GPD @ 100 PSI, 115 VAC Manual Control Stroke length is manually adjustable. See Specifications and Downloads tabs for de...
    115v 0.63GPH Learn More
  2. Pulsafeeder

    24 GPD/100 PSI Metering Pump

    024-XA-BAAA7XXX

    $836.55
    Chem-Tech Series 100 & 150 positive displacement, Chem-Tech diaphragm pumps are respected by professionals around the world for dependability, easy maintenance and versatility in a wide range of water treatment applications.

    24 GPD 100 PSI met...

  3. Pulsafeeder

    3 GPD/100 PSI Metering Pump

    003-XA-AAAAXXX

    $511.50
    3 GPD / 11.36 LPD 100 PSI metering pump 115 vac. 7 strokes / minute max. .3 Amps full load.

    Dimensions: 6.75" x 8.875" x 7.25" (H x W x D)

  4. Pumptec

    High pressure pump

    80171

    $648.02
    High pressure low volume electric pump. Pump has 2 sets of inlets and outlets.

    POPULAR MODEL IN Misting. With '02 nozzle flow is 1GPM. 348U-090/M7480547

    115v Learn More
  5. Pulsafeeder

    30 GPD/100 PSI Metering Pump

    030-XA-AAAAXXX

    $607.50
    30 GPD / 113.55 LPD 100 PSI metering pump 115 vac. 51 strokes / minute max. .79 Amps full load. 030-XA-AAAAXXX

    Dimensions: 6.75" x 8.875" x 7.25" (H x W x D)

  6. Pulsafeeder

    68 GPD/60 PSI Metering Pump

    068-XA-AAAAXXX

    $693.00
    68 GPD / 257.38 LPD 100 PSI metering pump 115 vac. 51 strokes / minute max. 1.0 Amps full load.

    Dimensions: 6.75" x 8.875" x 7.25" (H x W x D)

  7. Remco

    115v Demand Pump 2GPM

    3323-1E1-52C

    $206.41

    Demanding industrial pump environments require precise engineering and quality components. The demand pump was designed with both. Demand pumps operate as a positive displacement pump which has a pressure switch built in. When flow is open the pum...

    2GPM 60PSI 115AC Learn More
  8. Pulsafeeder

    7 GPD/100 PSI Metering Pump

    007-XA-AAAAXXX

    $511.50
    7 GPD / 26.50 LPD 100 PSI metering pump 115 vac. 13 strokes / minute max. .42 Amps full load.

    Dimensions: 6.75" x 8.875" x 7.25" (H x W x D)

  9. Pulsafeeder

    115V digital metering pump 192 GPD/50 PSI

    LMK7KA-PTC3

    $2,034.00
    Chemical metering injection pump. True microprossor controled instrument for precise and accurate metering control. 190GPD / 7.9GPH flow max. Packed with standard features, it includes automatic control via 4-20mA or 20-4mA inputs, external pace ...
  10. Pulsafeeder

    115V digital metering pump 120 GPD/100 PSI

    LMH6TA-PTC3

    $1,849.50
    Chemical metering injection pump. True microprossor controled instrument for precise and accurate metering control. 240GPD / 10GPH flow max. Packed with standard features, it includes automatic control via 4-20mA or 20-4mA inputs, external pace w...
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