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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. Air Diaphragm pump Aluminum

    All-Flo Pumps

    Air Diaphragm pump Aluminum

    A050-NAA-VVYV-S30
    $1,314.95

    Aluminum 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 vent ho...

    1/2" FKM Learn More
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  2. Bronze Gear pump

    Hypro Pumps

    Bronze Gear pump

    GMBN4VA5
    $1,615.42

    Rotary Gear pump 3/8". 303 SS fasteners, Ryton 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 for press...

    3/4" 1.5HP 115/230V ODP Learn More
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  3. Ober_N9000R.gif

    Oberdorfer Pumps

    Bronze Pedestal Gear Pump w/ relief valve

    N1000R
    $401.70
    Bronze Pedestal Gear pump with relief valve. Often used as a coolant pump on welding torch. Pump flow is reversible.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffecte...
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  4. Bronze Gear pump 1HP

    Hypro Pumps

    Bronze Gear pump 1HP

    GMBN3VA43
    $1,483.72

    Rotary Gear pump 3/8". 303 SS fasteners, Ryton 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 for press...

    3/8" 3phase ODP Learn More
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  5. Oberdorfer N61K10G-01C33 Bronze Rotary Gear Pump Motor

    Oberdorfer Pumps

    Bronze Rotary Gear Pump & Motor

    N61K10G-01C33
    $716.30
    PUMP AND MOTOR, no relief valve.

    This Bronze Rotary Gear Pump is popular among OEM users like generator Onan. It is a diesel fuel transfer pump featuring an all bronze design and 303 stainless steel shafts with options of non-metallic gears and a...

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  6. T 50 3plex Plunger 5.5hp

    General Pump

    T 50 3plex Plunger 5.5hp

    T9971
    $1,617.48
    T Series 50, Triplex Plunger Pump with Solid shaft--Forged brass manifold with an exclusive lifetime warranty. Flex coupling and bell housing available for direct drive. Solid ceramic plungers with continuously lubricated packings. Offered with o...
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  7. Hypro GMBN2VA Rotary Gear pump only

    Hypro Pumps

    Bronze Gear pump only

    GMBN2VA
    $1,069.56
    Rotary Gear pump end. 303 SS fasteners, Ryton 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 for pres...

    No motor Learn More
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  8. Oberdorfer N61010GR-01F02 Bronze Rotary Gear Pump Motor R

    Oberdorfer Pumps

    Bronze Rotary Gear Pump & Motor R

    N61010GR-01F02
    $677.30
    PUMP AND MOTOR with relief valve.

    This Bronze Rotary Gear Pump is popular among OEM users. It is a diesel fuel transfer pump featuring an all bronze design and 303 stainless steel shafts with options of non-metallic gears and a variety of shaft s...

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  9. Oberdorfer N61K10G-01 Bronze Rotary Gear Pump End

    Oberdorfer Pumps

    Bronze Rotary Gear Pump End

    N61K10G-01
    $302.90
    PUMP END ONLY

    This Bronze Rotary Gear Pump is popular among OEM users. It is a diesel fuel transfer pump featuring an all bronze design and 303 stainless steel shaft.

    Special Features:

    • Bronze Body
    • Helical Gears for Quiet Operation
    • Self-...
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  10. Pulsafeeder LPB2MA-PTC1 Chemical Feed Pump 5GPD/250 PSI

    Pulsafeeder

    Chemical Feed Pump 5GPD/250 PSI

    LPB2MA-PTC1
    $1,102.95
    Chemical Feed Pump. The Series E Plus offers the option to choose between 4-20mAfor external pace inputs for automatic control. Chemical Feed Pump or metering pump.
    • 20 flow/pressure envelops
    • 100:1 turn down ratio
    • 4-20mA with stop function
    • Extern...
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