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.
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Oberdorfer Pumps
N992R Gear Pump & Mtr & Relief
N992R-F41
$936.10Bronze rotary gear pump with relief valve, electric motor.Gear 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 resi...1/3HP 115v ODP Relief valve Learn More -
Oberdorfer Pumps
Bronze Pedestal Gear Pump 1"
N9000S3
$871.00Bronze 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...
1" Learn More -
Oberdorfer Pumps
Bronze Pedestal Gear Pump w/ relief valve
N9000RS16
$957.00Bronze Pedestal Gear pump with relief valve. 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 t...
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Oberdorfer Pumps
Bronze Rotary Gear Pump PEO w/ relief valve
N990R
$843.00Oberdorfer Close coupled bronze rotary gear pump end only w/ relief valve- Bronze Construction with SS shaft
- Helical gears for quiet operation
- Self-lubricating carbon bearings
- O-ring seal for max. leak protection
- Pump End Only (Motor Not In...
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Oberdorfer Pumps
Bronze Rotary Gear Pump PEO w/ relief valve
N990RS15
$938.00Oberdorfer Close coupled bronze rotary gear pump end only w/ relief valve.- Bronze Construction with SS shaft
- Helical gears for quiet operation
- Self-lubricating carbon bearings
- O-ring seal for max. leak protection
- Pump End Only (Motor Not Include...
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Oberdorfer Pumps
N991 Gear PUMP & motor reversible
N991M-F07
$989.00Reversible Gear PUMP & 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 service life. Pump ...
115v/230v Reversible 1/4" Learn More -
Graco Pumps
230v Electric APEX Oil Transfer pump
260104
$800.00The 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 Learn More -
Hypro Pumps
Cast Iron Gear Pump 1/2"
GCCN33V
$940.81Cast Iron Gear pump close coupled to a 1/2 hp Carbonator type motor. Use with lubricating liquids only, not water based.115/230v 1/2HP Learn More -
Hypro Pumps
Cast Iron Gear Pump 1/4"
GCCN22V
$807.73Cast Iron Gear pump close coupled to a 1/3 hp Carbonator type motor. Includes adjustable relief valve. For lubricating liquids, not water.115v/230v Learn More -
Hypro Pumps
Cast Iron Motor Mounted Gear Pump
GCCV22V
$923.45Cast Iron Gear pump close coupled to a 1/2 hp Carbonator type motor. Steel spur gears with steel shaft and CI shaft supports. Standard pressure relief valves that can be ported internally or externallyand adjusted.Shertech self-priming, positive...
115v CI Learn More
