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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Aquatec Pumps
5 chamber 12V diaphragm pump
5513-1E12-B636
$199.0012vdc 550 Series Super Flow Pump: Reverse Osmosis System Pump, High Powered RO / DI Reverse Osmosis Pump
OPERATION: The 550 pumps can draw water from a holding tank and pressurizeit, or boost the pressure from a low pressure source. It is designe...
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Jabsco Pumps
Commercial Duty 12vDC water pump
18670-0123
$365.00Commercial Duty Water Puppy has 25% more flow than the standard model and a heavy duty PMDC motor. For general transfer pumping where self-priming, 8 gpm flow and debris tolerance are required. Oil-resistant nitrile impeller is standard. Do not p...12v 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 ...
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Jabsco Pumps
12VDC Bronze Vane Reversible Pump
18680-1000
$463.00The Jabsco Reversible Rotary Vane Pump is ideal for transferring diesel fuel. With its integral On-Off Reversing switch, it is ideal for moving fuel between port and starboard fuel tanks.
- Rotor: Vectra
- Vanes: Ryton
- Seal: Lip Type, Nitrile
- 12...
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Jabsco Pumps
Commercial Duty 24v DC
18670-0943
$407.00Commercial Duty Water Puppy has 25% more flow than the standard model and a heavy duty PMDC 24 vdc motor. For general transfer pumping where self-priming, 8 gpm flow and debris tolerance are required. Oil-resistant nitrile impeller is standard. D...24v Learn More -
Jabsco Pumps
Diesel refueling pump
23870-1200
$299.00Jabsco rotary vane pump for diesel fuel and other fuel oils. Transfer pump for refuelling small sizes diesel powered vehicles 50 gal. from drums. Suitable for mounting to the following equipment: Excavators, Cranes, Road rollers (compactors), P...12vdc Learn More -
Oberdorfer Pumps
Bronze Rotary Gear Pump w/ motor & relief valve
N990RH-N76
$2,697.00Oberdorfer Close coupled bronze rotary gear pumps.- Bronze Construction with SS shaft
- Helical gears for quiet operation
- Self-lubricating carbon bearings
- O-ring seal for max. leak protection
- The pump drive shaft is connected to the motor shaf...