My Cart

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.
View as List Grid

Items 21-30 of 194

Set Descending Direction
per page
  1. PumpBiz

    Wobble Stator Pump

    AP-33CSQM

    $536.00

    Wobble stator pump for thick liquids. 

    The progressive cavity pump is a positive displacement system that is extremely flexible in its usability in a variety of specialized fields with difficult pumping applications such as viscous and highly-abr...

  2. 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
  3. Oberdorfer Pumps

    N991 Oberdorfer Bronze gear pump & motor

    N991-32F41

    $1,108.90
    Oberdorfer Bronze gear pump & motor. 3/8" Pump housings and gears are made of top quality bronze; shafts are from stainless steel 303. Bearings are designed of high performance carbon-graphite material selected for wear resistance and long ser...
    115v 3/8" Learn More
  4. Hypro Pumps

    Bronze Gear pump PEO

    GCBN2V

    $899.00
    Bronze Gear pump for close coupling to a 1/3 hp Carbonator type motor.

    Includes relief valve. Pump end only. Replaces 6PA26

    1/4" no motor Learn More
  5. Pumptec

    4 in 1 Spray System

    80294

    $418.41
    4 in 1 Basic plus, mister/fogger manifold andmounting bracket, tree gun plus nozzle andextension, lawn spray gun and suction strainerassemblies. Hose clamps and fittings. features:
    • Versatile pump design
    • Assembled as shown

    Plumbing of Pumptec Sp...

  6. Hypro Pumps

    Bronze Gear Pump W/Relief

    BBV1

    $800.00

    Bronze Pedestal Gear Pump, light duty with relief valve.

    Also see N2000 or N3000

    Self-priming, positive displacement, external rotary gear pumps are ideal for a wide range of light-duty industrial, marine, agricultural, and commercial applicatio...

    Bronze 1/4" Learn More
  7. Pumptec

    Basic Spray System 115V

    80722

    $431.24
    Pumptec pumps are a unique type of plunger pump.
    • Versatile pump design
    • Assembled as shown

    Applications: Sanitation, power washers, agriculture, hydrostatic testing, landscaping, pest control, misting, carpet cleaning, and window cleaning.

    115V spray system Learn More
  8. Oberdorfer Pumps

    Cooling Gear Pump w/ relief valve

    N1000R39

    $585.00
    Heliarc Welding machine cooling Pump. Bronze Pedestal Gear pump with relief valve. Often used as a coolant pump on welding torch, Miller welder heli-arc. Pump flow is reversible. Round body "no feet body".
    • Gear pumps are positive displacemen...
    Heliarc Welding Learn More
  9. Oberdorfer Pumps

    Close Coupled Bronze Rotary Gear Pump

    N991

    $538.20
    Rotary Gear Pump ONLY, no motor. Pump housings and gears are made of top quality bronze, shafts are 303 stainless steel. Bearings are designed of high performance carbongraphite material selected for wear resistance and long service life. Pesti...
    Pump End Only, no relief valve Learn More
  10. Pumptec

    Portable Toilet Service Sytem

    80729

    $1,335.00

    Series 356U - M60 Pump 12 Volt 0-700 PSI. Waterhorse 80729 PWK-713-12V.

    Includes unloader, gun, and inlet filter. Does NOT include hose. This electric pressure washer cleaner is one work horse in the pressure washing business and in power washing...

    12VDC pressure pump Learn More
View as List Grid

Items 21-30 of 194

Set Descending Direction
per page