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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Jabsco Pumps
6050 Bronze Utility Pump Flexible Impeller
6050-0003
$1,367.00Flexible 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 -
Jabsco Pumps
6050 Bronze Utility Pump Flexible Impeller
6050-0013
$1,376.88Flexible 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 TEFC Learn More -
AMT Pumps
3" Electric Diaphragm Pump
337E-96
20% Off Special Price $2,702.40 Regular Price $3,378.00Electric Diaphragm water pumps features 2-stage, 44 to 1 gear reduction with a large diameter output gear and heavy duty ball bearing construction. Often referred to as Mud pumps or Sludge pumps, diaphragm trash pumps are designed to pump mud, slu...
1.5HP 115/230v Learn More -
Oberdorfer Pumps
Bronze Rotary Gear Pump w/ relief valve & Motor
N991RM-32F01
$743.00Bronze Rotary Gear Pump. Includes electric 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 se...115v 1/4" Learn More -
Oberdorfer Pumps
Close Coupled Bronze Rotary Gear Pump w/ relief valve
N991RN32-F08
$881.00Bronze Rotary Gear Pump with electric 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...Pump & 1/3HP Motor 115v 1/4" Learn More -
Oberdorfer Pumps
Bronze Rotary Gear Pump EXP
N999-spec
$1,200.001/2 gpm diesel oil pump with EXP motor.Features N999 Series:
- Compact design eases installation and use in limited space areas.
- Construction is bronze and stainless steel wetted components.
- Close tolerance design allows for consistent perf...
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Oberdorfer Pumps
Bronze Rotary Gear Pump w/ relief valve
N991R-F41
$813.00Pump 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. Gear pumps are positive displacement p... -
Hypro Pumps
Hot Oil Gear Pump Relief Valve
NG11V
$2,600.00NG NSF Listed Industrial Gear Pumps. Obsolete
Gear pumps are recommended for non-abrasive, non-flammable liquids compatible with pump component materials. They can be used for liquid circulation, lubrication, pressure boosting, filtering, medium ...
Obs Learn More -
Oberdorfer Pumps
Close Coupled Bronze Rotary Gear Pump
N999Q-J46
$1,411.00Features N999 Series:
- Compact design eases installation and use in limited space areas.
- Construction is bronze and stainless steel wetted components.
- Close tolerance design allows for consistent performance
- Helical gears for quiet operatio...
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Oberdorfer Pumps
Close Coupled Bronze Rotary Gear Pump w/ relief valve
N991RM-J07
$984.00Pump 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. Gear pumps are positive displacement pum...1/2HP 115/230v Learn More