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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 5537-1E1-58C 115v Demand Pump 5.3GPM

    Remco

    24v Demand Pump 5.3GPM

    5537-1E1-73A
    $219.00
    24VDC demand pump

    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 which has a pressure switch built in. When flo...

    5.3GPM 60PSI 24v NPT FKM Learn More
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  2. Remco_demand pump

    Remco

    115v Demand Pump 1GPM

    3321-1E1-52C
    $206.41

    Diaphragm pump with automatic switch. Demand

    Demanding industrial electric pump environments require precise engineering and quality components葉he demand pump was designed with both. Demand pumps operated as a positive displacement pump which h...

    1GPM 60PSI 115AC Learn More
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  3. riverside homelite trash pump 121TP L1537Z L1602y tp3 seal tp2

    Riverside

    Shaft seal pump repair kit

    627131A
    $99.00
    Shaft seal for Riverside Homelite 3" 2" trash pump and S3, repair kit. Includes both halves of the seal. 62713-1A
    3" Learn More
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  4. riverside homelite trash pump L1605Z tp4 seal 46150

    Riverside

    Shaft seal pump repair kit

    46150
    $103.00
    Shaft seal for Riverside Homelite 4" trash pump, repair kit. Includes both halves of the seal. L1605Z
    4" pump seal Learn More
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  5. Remco_demand pump

    Remco

    Bypass Pump 2GPM

    3321-2E1-82A
    $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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  6. allflo_61zbq1r7sql._sl1000__4.jpg

    All-Flo Pumps

    Air Diaphragm pump Aluminum

    A100-NAA-TTYT-B30
    $1,298.67
    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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  7. Remco_Fatboy.jpg

    Remco

    Demand Pump 5.3GPM

    5537-1E3-58C
    $232.20

    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 which has a pressure switch built in...

    5.3GPM 60PSI 115v NPT Geolast Learn More
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  8. 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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  9. 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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  10. riverside_dp3e-.jpg

    Riverside

    3 in. Electric diaphragm pump

    DP3E
    $1,863.00

    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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