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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Flojet Pumps
115v Dia. Pump w/Switch
4300-529A
$589.00Commercial Duty - Developed to deliver higher flows up to 3.3 GPM using a four piston design with excellent self-priming capability. Built-in pressure switch automatically starts and stops pump at its 30 PSI setting. Motor is a Induction motor fo...Continuous Duty FKM Induction motor Learn More -
Flojet Pumps
115v Dia. Pump w/Switch
4300-531A
$579.00Commercial Duty - Developed to deliver higher flows up to 3 GPM using a four piston design with excellent self-priming capability. Built-in pressure switch automatically starts and stops pump at its 30 PSI setting. Motor is a continuous duty PSC,...Continuous Duty Santo Learn More -
Flojet Pumps
115v Diaphragm Pump w/Switch
4300-043A
$231.00Diaphragm Pump, electric, Industrial QUAD pump - Developed to deliver higher flows up to 5 GPM using a four piston design with excellent self-priming capability. Permanent Magnet Motor, brushes. Built-in pressure switch automatically starts and s...NOT Continuous duty Learn More