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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. Remco_demand pump

    Remco

    Bypass Pump 2GPM

    3321-2E1-82B
    $206.41

    Industrial pump environments require precise engineering and quality components the bypass pump was designed with both. For its size, it is one of the most powerful and productive diaphragm pumps you can buy, pumping up to 2.0 gallons per minute. ...

    2GPM 60PSI 12v Learn More
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  2. allflo_61zbq1r7sql._sl1000__4.jpg

    All-Flo Pumps

    Air Diaphragm pump Aluminum

    A100-NAA-TTYT-B30
    $2,800.50
    Aluminum Air AODD Pump 1". Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Click here to Learn How to Size your Diaphragm Pump and for a Materi...
    Alum/ptfe/1" Learn More
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  3. Remco_Fatboy.jpg

    Remco

    Demand Pump 5.3GPM

    5537-1E3-58C
    $246.71

    Review New Model: 5537-1E1-65C

    Extreme Duty 115v --5.3gpm Demanding industrial pump environments require precise engineering and quality components the demand pump was designed with both. Demand pumps operated as a positive displacement pump whic...

    5.3GPM 60PSI 115v NPT Geolast Learn More
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  4. Riverside - 03438: Diaphragm repair part

    Riverside

    Shaft seal pump repair kit

    47046
    $69.00

    Shaft seal for Riverside Homelite 2-1/2" high pressure fire pump FP25. Includes both halves of the seal. L1610Z

    If you need help picking other repair parts for Riverside or Homelight pumps just contact us. We can also trouble shoot your applicati...

    2.5" pump parts Learn More
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  5. Seal pump repair kit

    Riverside

    Seal pump repair kit

    A43297C
    $44.00

    Riverside Seal and oring for Riverside Homelite AP22  pump in plastic. Includes both halves of the shaft seal. EPDM elastomers.

    If you need help picking other repair parts for Riverside or Homelight pumps just contact us. We can also trouble shoo...

    AG pump seals Learn More
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  6. riverside_dp3e-.jpg

    Riverside

    3 in. Electric diaphragm pump

    DP3E
    $1,963.00

    Riverside Pumps' rugged and reliable Diaphragm Pumps are sometimes called "mudhogs" for their ability to pump heavy mud and sludge, thicker than any centrifugal pump can handle. They also have the advantage of being able to run dry without damage,...

    115/230v Learn More
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  7. Remco - 3323-1E1-82B: 12v Demand Pump 2GPM

    Remco

    12v Demand Pump 2GPM

    3303-1E1-82B
    $196.58

    3303 no longer available. Review 3323-1E1-82B or 3313-1E1-82B

    Demanding industrial pump environments require precise engineering and quality components the demand pump was designed with both. Demand pumps operated as a positive displacement pump ...

    2GPM 60PSI 12VDC Learn More
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  8. Remco 5538-1I1-94A FatBoy Demand Pump

    Remco

    FatBoy Demand Pump

    5538-1I1-69C
    $399.71

    New Model Number to Review: 5538-1E1-69C

    THE PROFLO FATBOY® PUMPS UP THE VOLUME WITH 7GPM. Demanding industrial pump environments require precise engineering and quality componentsè. The ProFlo FatBoy® was designed with both. To maximize the p...

    7GPM 100PSI 115V Demand NPT Learn More
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  9. All-Flo - A100-FPK-TTKT-S70: pvdf Air Operated Double Diaphragm Pump

    All-Flo Pumps

    Kynar Air Operated Double Diaphragm Pump

    A100-FPK-TTKT-S70
    $3,660.32

    Kynar PVDF Air AODD Pump 1/4". Air operated Diaphragm pump. Suitable for strong acids and bases. Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Repl...

    1" KT-10 Kynar Teflon Learn More
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  10. All-Flo - A100-FPP-SSPE-S70 polypro Air Operated Double Diaphragm

    All-Flo Pumps

    PolyPro 1" Air Operated Double Diaphragm Pump

    A100-FPP-SSPE-S70
    $1,737.56

    PolyPro Air AODD Pump 1". Chemical double diaphragm pump made in USA. Featuring All-Flo's Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Replaces PE...

    1" PE-10 PolyPro Santo Learn More
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