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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. Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor & relief valve

    N990RH-M46

    $2,748.20
    Oberdorfer Close coupled bronze rotary gear pumps.
    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • The pump drive shaft is connected to the motor shaf...
  2. Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor

    N990H-N26

    $2,276.30
    Oberdorfer Close coupled bronze rotary gear pumps.
    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • The pump drive shaft is connected to the motor shaft by ...
  3. Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor & relief valve

    N990RJ-N96

    $2,483.00
    Oberdorfer Close coupled bronze rotary gear pumps.
    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • The pump drive shaft is connected to the motor shaf...
  4. Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor & relief valve

    N990RJ-T95

    $2,532.40
    Oberdorfer Close coupled bronze rotary gear pumps.
    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • The pump drive shaft is connected to the motor shaf...
  5. Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor & relief valve

    N990RK-Y95

    $3,205.80
    Oberdorfer Close coupled bronze rotary gear pumps.
    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • The pump drive shaft is connected to the motor shaf...
  6. Oberdorfer Pumps

    1.25" Bronze gear pump

    N1100XN46

    $4,751.50
    1 1/4" Bronze rotary gear pump with relief valve and close coupled to a 1 HP ODP motor.

    Use to pump oil and other viscous thick liquids.

    1HP 115/230v ODP Learn More
  7. Oberdorfer Pumps

    3/4" Bronze gear pump 1HP

    N970RH-N26

    $5,003.27
    3/4" Bronze rotary gear pump with relief valve and close coupled to a 1 HP 115v/1/60 1725 RPM TEFC motor.Pump housings and gears are made of top quality bronze, shafts are stainless steel 303. Bearings are made of high performance carbon-grap...
    115/230v ODP Relief Valve Learn More
  8. Hypro Pumps

    Bronze Gear pump 1/2 hp

    GCBN33V

    Call For Price
    Bronze Gear pump close coupled to a 1/2 hp Carbonator type motor. Bronze spur gears with 304 stainless steel shaft and carbon/graphite shaft supports. Standard pressure relief valves that can be ported internally or externallyand adjusted.

    She...

    3/8" 115v This Pump is no longer available. Please call us for possible alternatives Learn More
  9. Hypro Pumps

    Bronze Gear pump 1/3 hp

    GCBN22V

    $866.00
    Bronze Gear pump close coupled to a 1/3 hp Carbonator type motor. 115v

    Includes relief valve.

    115v 1/4" Learn More
  10. Oberdorfer Pumps

    Bronze Rotary Gear Pump w/ motor & relief valve

    N990RH-N26

    $2,455.70
    Oberdorfer Close coupled bronze rotary gear pumps.
    • Bronze Construction with SS shaft
    • Helical gears for quiet operation
    • Self-lubricating carbon bearings
    • O-ring seal for max. leak protection
    • The pump drive shaft is connected to the motor shaft by ...
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