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
Gear Pump & 12VDC Motor
N992R-C81
$1,618.1012V DC Gear Pump with relief valve. Housings and gears are made of top quality bronze; shafts are from stainless steel 303. Continuous Duty gear pump fitted with 12V DC motor. Bearings are designed of high performance carbon-graphite material s...1/3HP 12V DC Relief valve 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
N992R Gear Pump & Mtr
N992R-C82
$1,618.1024vDC gear pump and 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. Inclu...1/4HP 24vDC Learn More -
Oberdorfer Pumps
DC Bronze Rotary Gear Pump
N999R-C81
$1,443.00Bronze 12v DC gear pump mounted to a 1200rpm 1/4 HP motor. Pump has relief valve.Features N999 Series:
- Compact design eases installation and use in limited space areas.
- Construction is bronze and stainless steel wetted components.
- Close ...
12 volt DC 1/4" Learn More