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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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 -
Oberdorfer Pumps
N994 Gear Pump & Mtr.
N994J-W45
$1,995.00Gear 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 positive...
2HP 115/230 Learn More