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
Bronze Rotary Gear Pump w/ motor & relief valve
N990RK-Y95
$2,466.00Oberdorfer 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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Hypro Pumps
316 Stainless Steel Gear pump
GMSV6C7T
$4,300.18Rotary Gear pump with motor. 316 Stainless construction, Ryton gears.
Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the back pressure in the discharge line. Shaft...
3HP 230V TEFC Learn More -
Hypro Pumps
316SS Gear pump end only
GMSV6C
$3,217.03Rotary Gear pump PEO pump end only. 303 SS fasteners, Ryton gears.Use for pressure spraying, circulation of lubricants, tank / drum filling. Will handle water like liquids to very thick. Bi-rotational allows for flow direction reversal. Flu...
3HP Learn More -
Oberdorfer Pumps
Bronze Rotary Gear Pump w/ motor
N990K-Y45
$2,387.00Oberdorfer 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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Oberdorfer Pumps
Bronze Rotary Gear Pump w/ motor
N990K-Y97
$2,478.00Oberdorfer 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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Oberdorfer Pumps
Bronze Rotary Gear Pump w/ motor
N990L-Y98
$2,984.00Oberdorfer 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
Bronze Rotary Gear Pump w/ motor & relief valve
N990RL-Y96
$2,736.00Oberdorfer 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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Hypro Pumps
Cast Iron Gear pump
GMCV6VC7
$2,587.51Rotary Cast Iron Gear pump 1" with electric motor. 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 ...
3HP 230v/1 ODP 1" Learn More