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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. Riverside Homelite 741541 flapper valve

    Riverside

    Diaphragm pump flapper kit 3"

    741541
    $49.00

    Repair 741541 flapper part Riverside Homelite mud pump DP3.

    Diaphragm pumps are positive displacement pumps. They pump a specific volume for each pump cycle. Diaphragm pumps move fluids more slowly than centrifugal pumps, but can handle mud and l...

    3" pump flapper valve Learn More
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  2. Remco_Fatboy.jpg

    Remco

    12v Demand Pump 5.3GPM

    5537-1E1-82B
    $270.00

    12vdc 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. When flow is...

    5.3GPM 60PSI 12v NPT Learn More
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  3. General Pump KE20A EK 3plex Plunger 23.6hp

    General Pump

    EK 3plex Plunger 23.6hp

    KE20A
    $7,500.85
    A heavy-duty industrial pump with a nickel-plated, spheroidal cast-iron manifold.
    • Pump Dimensions: 18.2" x 17.5" x 7.3"
    • Max. Inlet Pressure: 45 PSI
    • Max. Fluid Temp.: 140ï½°F
    • Inlet Port Thread: 1" BSP-F
    • Discharge Port Thread: 3/4" BSP-F
    • Sh...
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  4. Aquatec 5503-1E12-J526 Hi-Flo Dem Pump

    Aquatec Pumps

    Hi-Flo Dem Pump

    5503-1E12-J526
    $289.08
    4.9 GPM 60PSI Demand delivery pump. OPERATION: The 550 pumps can draw water from a holding tank and pressurizeit, or boost the pressure from a low pressure source. It is designed to operate intermittently, but most versions can run continuously f...
    5GPM 60PSI 115v Learn More
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  5. Remco 5538-2E6-94A Street Sweeper Pump 60PSI Bi-pass

    Remco

    Street Sweeper Pump 60PSI Bi-pass

    5538-2E1-94A
    $426.00

    Street Sweeper pump.

    THE PROFLO FATBOY® PUMPS UP THE VOLUME WITH 7GPM. Demanding industrial pump environments require precise engineering and quality components in the ProFlo FatBoy® was designed with both. To maximize the potential of all five...

    7GPM 60PSI 12VDC Learn More
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  6. Pumptec 80022 High pressure pump

    Pumptec

    High pressure pump

    80022
    $461.54
    High pressure low volume electric pump. Pump has 2 sets of inlets and outlets.

    POPULAR MODEL IN CARPET CLEANING INDUSTRY FOR 200PSI EXTRACTORS. With '02 nozzle flow is .71GPM.205V-095M5380547

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  7. AMT electric diaphragm pump

    AMT Pumps

    2" Electric Diaphragm Trash Pump

    338E-96
    23% Off Special Price $2,646.64 Regular Price $3,437.19

    New model 338E-96 Powered by 1.5HP electric motor. AMT 2" Diaphragm pumps features 2-stage, 44 to 1 gear reduction with a large diameter output gear and heavy duty ball bearing construction. ALSO AVAILABLE IN 1-PHASE,115/230V Often referred to as ...

    1.5HP 115/230v Learn More
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  8. All-Flo AL-30E Diaphragm pump Aluminum Air Operated Diaphragm Pump

    All-Flo Pumps

    Aluminum Air Operated Diaphragm Pump

    AL-30E
    $3,110.25
    Aluminum AODD Pump 3". Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Models available in PP, PVDF, Nylon, Conductive Nylon, Al and 316SS from .2...
    Aluminum EPDM 3" Learn More
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  9. Remco 5516-2E6-63A 12vdc Bypass Pump 4GPM

    Remco

    12vdc Bypass Pump 4GPM

    5516-2E6-63A
    $214.92

    New Model Number to Review: 5536-2E1-63B

    12v diaphragm pump with by-pass. Quick Connect QD ports accept various size fittings. Industrial pump environments require precise engineering and quality components - the demand pump was designed with bot...

    4GPM 60PSI 12VDC Buna QD Bypass Learn More
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  10. Electric diaphragm pump 2 in.

    Riverside

    Electric diaphragm pump 2 in.

    DP2H-1
    $1,596.00

    Electric diaphragm pump 2 in.

    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 ...

    2" Electric Learn More
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