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
N992 Pump & Mtr.
N992-F41
$1,118.00Bronze 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. Motor may not ...1/3HP 115v Learn More -
Oberdorfer Pumps
N993 Bronze Pump & Motor
N993M-J07
$1,146.00Bronze 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 ar...
1/2 HP 115v Learn More -
Oberdorfer Pumps
N993 Pump & motor
N993RM-J07
$1,238.00Pump 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 positive displac...
1/2HP 115/230v Relief Vavle Learn More -
Oberdorfer Pumps
N994 Gear Pump & Mtr.
N994H-N26
$1,554.00Gear 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 posit...
1HP 115/230v Learn More -
Oberdorfer Pumps
3/4" Bronze gear pump 1HP
N970H-N75
$2,659.003/4" Bronze rotary gear pump without relief valve and close coupled to a 1 HP 12VDC 1725 RPM motor. Often used to pump Diesel fuel. Pump housings and gears are made of top quality bronze, shafts are stainless steel 303. Bearings are made of high ...12vdc Learn More -
Oberdorfer Pumps
12vdc Bronze Rotary Gear Pump w/ relief valve
N991R-32A96
$658.00Bronze gear pump 12v. 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 life. Gear pumps are pos...12vdc 1/4HP Learn More -
Oberdorfer Pumps
DC Bronze Rotary Gear Pump w/ relief valve
N991R-32C81
$1,427.00Pump 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...12VDC 1/4 Learn More -
Oberdorfer Pumps
Close Coupled Bronze Rotary Gear Pump
N999Q-F09
$1,009.00Features 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
N992R Gear Pump & EXP Motor
N992RQ-F09
$1,611.50Explosion Proof Gear Pump with housings and gears are made of top quality bronze; shafts are from stainless steel 303. Hazardous Duty gear pump fitted with EXP motor. Bearings are designed of high performance carbon-graphite material selected f...1/3HP 115v Explosion Proof Learn More -
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