Rotary Pumps - Gear, Flexible Impeller, Screw

These pumps have a set of rotating gears, flexible impellers, screw rotor or vanes connected to a driven shaft. Therefore most of these pumps incorporate a mechanical seal, packing or lip seal along the shaft at its back end in order to keep the fluid from leaking along the shaft. There are a few models, which are magnetically coupled and thus seal-less. Another type which is seal-less is the Peristaltic which uses a rotating roller assembly to compress a hose over a given arc length. These pumps are very reliable in pumping medium to thick liquids which typically are not handled by Centrifugal pumps and in applications where medium to high discharge pressures are needed at low flow rates. Varying the motor speed easily controls their output. Most units include some sort of built in relief valve, but those that do not must have one installed into the piping to prevent a dangerous over pressure condition. Not recommended for liquids with fine abrasives or thin non-lubricating liquids like water that will accelerate pump wear.Typical Positive Displacement Rotary pumps include helical gear, spur gear, lobe, progressive cavity, peristaltic, flexible impeller and sliding vane to name a few.

Oberdorfer Pumps

Rubber Impeller Bronze Pump

405M-04M35

$2,100.80

Oberdorfer rubber (flex) impeller pump with solid cast bronze housing. Close coupled Rubber Impeller Pumps are made of high quality bronze for maximum corrosion resistance. The rubber impeller is mounted on a separate stainless steel shaft which i...

115v 3/4HP 1" TEFC Learn More

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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...
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Oberdorfer Pumps

3/4" Bronze gear pump 3/4HP

N970H-M46

$1,597.70

3/4" Bronze rotary gear pump with relief valve and close coupled to a 3/4 HP 115v/1/60 1150 RPM TEFC motor. Shaft speed and flow are directly proportional. Motor HP needs to increase with a increase in pump pressure. The nature of a positive disp...

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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.

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1HP 3/8" Learn More

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Graco Pumps

230v Electric APEX Oil Transfer pump

260104

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The PBL oil transfer pumps are designed specifically to transfer bulk oils and hydraulic fluids, motor oil, antifreeze. Larger horsepower electric motors with a smaller displacement gear pump assure adequate power to pump viscous fluids at low ...

230V - 4.25gpm. This pump has been discontinued. Please see the list of related products for a replacement Learn More

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Graco Pumps

115v Electric APEX Oil Transfer pump

260108 (TP16-15)

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The PBL oil transfer pumps are designed specifically to transfer bulk oils and hydraulic fluids, motor oil, antifreeze. Larger horsepower electric motors with a smaller displacement gear pump assure adequate power to pump viscous fluids at low ...

115V- 4.2gpm Learn More

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Graco Pumps

115v Electric APEX Oil Transfer pump

260106 (TP9-15)

$628.00

The PBL oil transfer pumps are designed specifically to transfer bulk oils and hydraulic fluids, motor oil, antifreeze. Larger horsepower electric motors with a smaller displacement gear pump assure adequate power to pump viscous fluids at low ...

115V- 3gpm Learn More

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Graco Pumps

115v Electric APEX Oil Transfer pump wall mount unit

260105 (TP8-15)

$633.00

The PBL oil transfer pumps are designed specifically to transfer bulk oils and hydraulic fluids, motor oil, antifreeze. Larger horsepower electric motors with a smaller displacement gear pump assure adequate power to pump viscous fluids at low ...

115V- 3gpm Learn More

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Oberdorfer Pumps

Bronze gear pump

N993C-M26

$1,298.70

Bronze gear pump. 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 service life.
Gear pumps are p...

3/4HP 115/230v Learn More

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Jabsco Pumps

6050 Bronze Utility Pump Flexible Impeller

6050-0003

$1,369.00

Flexible Impeller pump for general transfer pumping using 115V AC power where self-priming, 23 gpm flow and debris tolerance are required. Oil-resistant nitrile impeller is standard. Do not pump gasoline or other flammable liquids. DO NOT RUN D...

115v 3/4HP ODP Learn More

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