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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PumpBiz
120v Electric Fuel Transfer
927
$784.00115-120v fuel transfer pump This model is manual, meaning no automatic nozzle. Positive displacement, self-priming vane pumps are designed for efficient gasoline, kerosene, and diesel fuel transfer. Flexible mounting options fit any tank design.
...120v Diesel Learn More -
Hypro Pumps
Cast Iron Motor Mounted Gear Pump
GCCV22V
$923.45Cast Iron Gear pump close coupled to a 1/2 hp Carbonator type motor. Steel spur gears with steel shaft and CI shaft supports. Standard pressure relief valves that can be ported internally or externallyand adjusted.Shertech self-priming, positive...
115v CI Learn More -
Graymills Pumps
Vertical CI Centrifugal Pump & Mtr
SG1A 1/25
$640.80The SG series are gear pumps specially designed for high pressure applications. These pumps are recommended for use with liquids that have some lubricating qualities and are relatively free of abrasives and scale. These pumps mount vertically and... -
Graymills Pumps
Vertical CI Centrifugal Pump & Mtr
SG2A 1/8
$934.20The SG series are gear pumps specially designed for high pressure applications. These pumps are recommended for use with liquids that have some lubricating qualities and are relatively free of abrasives and scale. These pumps mount vertically and...