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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 5538-2I1-94A Street Sweeper Pump 60PSI Bi-pass

    Remco

    Street Sweeper Pump 100PSI Bi-pass

    5538-2I1-94A
    $426.00

    Street Sweeper pump.

    THE PROFLO FATBOY BYPASS 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 f...

    7GPM 100PSI 12VDC Learn More
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  2. Replacement Diaphragm myers seth DD-4 4D126

    Myers-Seth

    Replacement Diaphragm

    4D126
    $195.00

    Myers Seth Pumps Replacement Diaphragm, 15" diameter.

    The Double Diaphragm (DD) series pump is one of our company signature pumps and is the first pump we began manufacturing. The Double Diaphragm has become a staple with site and utility contrac...

    Diaphragm, single Learn More
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  3. Replacement flapper for Diaphragm pump myers seth DD-4

    Myers-Seth

    Replacement Flapper

    4F237
    $28.00

    Myers Seth Pumps Replacement Flapper for 4" diaphragm pump. 4 Required

    The Double Diaphragm (DD) series pump is one of our companyç—´ signature pumps and is the first pump we began manufacturing. The Double Diaphragm has become a staple with site...

    Flapper, single Learn More
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  4. Remco 5536-2E3-63B 12vdc Bypass Pump 4GPM

    Remco

    12vdc Bypass Pump 4GPM

    5536-2E1-63B
    $214.92

    12v diaphragm pump with by-pass for bleach used in house exterior cleaning. Quick Connect ports accept various size fittings. Industrial pump environments require precise engineering and quality components - the demand pump was designed with both....

    4GPM 60PSI 12VDC FKM NPT Bypass Learn More
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  5. Pumptec 80134 High pressure pump

    Pumptec

    High pressure pump

    80685
    $491.84

    SimPlE, SinglE PlungER DESign Uses the most effi cient pump technology and created the simplest design. Pumptec pumps get more work done with less energy. DiRECt-to-motoR mounting The Pumptec pumps mount directly to the motor end bell eliminatin...

    115v Learn More
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  6. All-Flo - A150-NAA-GGPN-B30: Stainless Steel Air Operated Diaphragm Pump

    All-Flo Pumps

    Aluminum Air Operated Diaphragm Pump

    A150-NAA-GGPN-B30
    $2,163.51
    Aluminum AODD Pump 1 1/2". 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 fro...
    Geolast Diaphragm 1.5" Learn More
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  7. All-Flo Ab-30 Double diaphragm pump Air Operated 3" alluminum

    All-Flo Pumps

    Air Operated 3" Diaphragm Pump

    A300-NAA-GGNN-000
    $4,037.55
    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 Nitrile Learn More
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  8. Remco 5537-1E1-58C 115v Demand Pump 5.3GPM

    Remco

    24v Demand Pump 5.3GPM

    5537-1E1-73B
    $256.00

    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...

    5.3GPM 60PSI 24v Demand Viton Santoprene 1/2″ FNPT 110/120 VAC Learn More
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  9. 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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  10. 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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