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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. Hypro Pumps

    Bronze gear pump

    GPBN6V

    $1,355.72
    Bronze pedestal mounted gear pump. For oils and other lubricating liquids. Excellent for water based fluids. Ryton PPS spur gears provide quiet operation and chemical compatibility. No metal to metal contact.
  2. Oberdorfer Pumps

    N992R Gear Pump & Mtr

    N992RM-J07

    $1,485.77
    Rotary bronze gear pump with electric motor. 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 s...
    1/2Hp 115/230v ODP Learn More
  3. General Pump

    MSZ 3Plex Plunger 55.5hp w/ gearbox

    MSZ5515R

    $55,214.26
    MSZ Series, Triplex Plunger Pump, 316 SS Manifold and Wetted Parts, including Valve Plate and Seat.
    • Max. Inlet Pressure: 45 PSI
    • Max. Fluid Temp.: 140ï½°F
    • Inlet Port Thread: 2 1/2" NPT-F
    • Discharge Port Thread: 1 1/4" NPT-F
    • Pump Dimensions: 27.7" ...
  4. Hypro Pumps

    Bronze Rotary Gear pump

    GMBN5VB6

    $1,693.77
    Rotary Gear pump with electric motor. 303 SS fastners, Ryton gears. Heavy duty rotary external Gear pump, heavy duty with motor.

    Adjustable relief valve designed for internal pressure relief, can be ported for either internal or external discha...

    3/4" 2HP 115/230v Learn More
  5. Oberdorfer Pumps

    Bronze Pedestal Gear Pump

    N9000S15

    $1,247.81
    Bronze Pedestal Gear pump. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the backpressure in the...
  6. General Pump

    Reverse Osmosis pump

    WM2315C DI RO

    $4,130.40
    DI water, RO Pressure pump.Triplex Plunger Pumps. Reverse Osmosis pump good on sea water, marine RO units. Hollow Shaft, Flanged for Direct Couple to Electric Motors (NEMA-56C).
    • Forged 316 Stainless Steel 316SS manifold with exclusive lifetime w...
  7. Oberdorfer Pumps

    Bronze Pedestal Gear Pump

    N9000S16

    $1,147.97
    Bronze Pedestal Gear pump. Often used as a oil pump on large ships to pre-lube the bearings.
    • Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the backpressure in the...
  8. General Pump

    SH 3Plex GB 138.5hp

    SH2017

    $61,484.06
    SH Triplex Plunger Pump. A heavy-duty, high pressure industrial pump with a stainless steel manifold and internal gearbox.
    • Max. Inlet Pressure: 100 PSI
    • Max. Fluid Temp.: 86ï½°F
    • Inlet Port Thread: 1 1/2" BSP-F
    • Discharge Port Thread: 3/4" B...
  9. Hypro Pumps

    Bronze Gear pump

    GMBN2VA33

    $1,369.42
    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...

    1/4" 1/3HP 230/460v Learn More
  10. All-Flo Pumps

    Stainless Steel Air Operated Double Diaphragm Pump

    SP-10

    $3,862.65

    Stainless Steel AODD Pump 1".

    New PN A100-NA3-TT3T-B70   Lube-free air valve, Non-stalling, No vent holes for corrosive fumes to get into, All plastic air system are corrosion resistant. Non-electrical. Inlet and outlet manifolds can be rotated s...

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