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Positive Displacement Pumps

These pumps are often thought of as high-pressure pumps. Their positive displacement of fluid and fixed volume are the result of the fluid being mechanically moved through their pump passage on a regular cycle. This means that regardless of the system they discharge into, the pressure and volume will remain constant. The power of the driving device and its speed, limit the volume and pressure.Positive Displacement pumps:Flow rates of GPD, CC/min to 100 GPM typically.Discharge pressures of a 1 to 1000 PSI.Low speed and fixed volume per cycle, they handle very viscid fluids well.Smaller than centrifugal pumps.Quiet, do not ad much heat to the fluid, suitable for shear sensitive fluids.Diaphragm pumps can easily pass solids, stringy and fibrous foreign matter. Are made in materials from CI to Titanium and PP, PVDF and PPS engineering resins.
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  1. Riverside - 03439: Diaphragm pump repair kit

    Riverside

    Diaphragm pump repair kit 2"

    03439
    $149.00

    Repair diaphragm for Riverside Homelite mud pump DP2. 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 larger a...

    2" Learn More
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  2. 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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  3. 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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  4. 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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  5. 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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  6. 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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  7. 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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  8. 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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  9. 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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  10. All-Flo A200-CA3-SS3E-000 Aluminum Air Operated Double Diaphragm Pump

    All-Flo Pumps

    Aluminum Air Operated Double Diaphragm Pump

    A200-CA3-SS3E-000
    $6,908.55

    Aluminum AODD Pump 2" NPT. Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Aluminum 2" connections are dual FNPT and Flange (ANSI 150#/DIN) design.

    ...
    2" Learn More
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