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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. 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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  2. All-Flo - A100-FPP-GGPN-S70 polypro Air Operated Double Diaphragm

    All-Flo Pumps

    PolyPro Air Operated Double Diaphragm Pump

    A100-FPP-GGPN-S70
    $2,857.80

    PolyPro Air AODD Pump 1", Geolast diaphragm. 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-elec...

    1" PE-10 PolyPro Geolast Learn More
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  3. All-Flo - A100-FPP-TTPT-S70 polypro Air Operated Double Diaphragm

    All-Flo Pumps

    PolyPro Air Operated Double Diaphragm Pump

    A100-FPP-TTPT-S70
    $2,143.32

    PolyPro Air AODD Pump 1", PTFE diaphragm. 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-electri...

    1" PE-10 PolyPro PTFE Learn More
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  4. remco rebel rv water pump nsf 12vdc

    Remco

    NSF RV Pump 12v

    53REBEL-JRV
    $215.00

    Remco 53REBEL-JRV NSF Certified RV Water Pump (12V)

    The Remco 53REBEL-JRV is a high-performance, NSF-certified RV water pump engineered for reliable, on-demand fresh water delivery. Designed for RVs, campers, 5th wheels, and off-grid cabins, this...

    3GPM 60PSI 12VDC Learn More
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  5. Remco 5537-1E1-58C 115v Demand Pump 5.3GPM

    Remco

    115v Demand Pump 100PSI

    5537-1i1-65C
    $323.00

    115V Demand Pump, 100 PSI

    The Remco 5537-1i1-65C is a high-performance 115V diaphragm demand pump, engineered for industrial, agricultural, and commercial applications requiring precision, reliability, and efficiency. With a built-in pressure swi...

    2.2GPM 100PSI 120v NPT Learn More
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  6. All-Flo Stainless 1/2" diaphragm pump A050-NA3-VV3V-000

    All-Flo Pumps

    Air Diaphragm pump Stainless

    A050-NA3-VV3V-000
    $1,867.80

    Stainless Steel Diaphragm Air AODD Pump 1/2". 

    All-Flo pneumatic diaphragm pumps are used throughout industry, chemical, paints, solvents and paints. Standard (Suction Right / Discharge Right). Made in USA.

    Lube-free air valve, Non-stalling, No ...

    1/2" Stainless Learn More
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  7. All-Flo Stainless 1/2" diaphragm pump A050-NA3-GT3N-S70

    All-Flo Pumps

    Air Diaphragm pump Stainless

    A050-NA3-GT3N-S70
    $1,867.80

    Stainless Steel Diaphragm Air AODD Pump 1/2". 

    All-Flo pneumatic diaphragm pumps are used throughout industry, chemical, paints, solvents and paints. Standard (Suction Right / Discharge Right). Made in USA.

    Lube-free air valve, Non-stalling, No ...

    1/2" Stainless Geolast Learn More
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  8. Hypro GMCV3VA Cast Iron Gear pump 1hp 3/8"

    Hypro Pumps

    Cast Iron Gear pump 3/8

    GMCV3VA4
    $1,114.00

    Rotary Cast Iron Gear pump 3/8". 303 SS fasteners, steel gears.

    Adjustable relief valve designed for internal pressure relief, can be ported for either internal or external discharge. Do not operate the relief valve for more than one minute.

    Use...

    1HP 3/8" Learn More
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  9. FatBoy Demand Diaphragm Pump

    Remco

    FatBoy Demand Diaphragm Pump

    5538-1E1-69C
    $412.56

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

    7GPM 60PSI 115V NPT Demand Learn More
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  10. 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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