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
1.25" Bronze gear pump
N11500-21
$1,642.001 1/4" Bronze rotary gear pump without relief valve. Pedestal mount pump only. Upper drive shaft location. See performance graph for flow rates vs motor RPM and HP (under image tab) . If used above 900 RPM, then duty cycle is limited to intermitt...Up to 55GPM Learn More -
Oberdorfer Pumps
1.25" Bronze gear pump
N11500S5
$1,748.001 1/4" Bronze rotary gear pump without relief valve. Pedestal mount pump only. Upper drive shaft location. See performance graph for flow rates vs motor RPM and HP (under image tab) . If used above 900 RPM with non-lubricating fluid, then duty ...Up to 55GPM FKM Lip seal Learn More -
Oberdorfer Pumps
1.25" Bronze gear pump
N1100XN46
$3,655.001 1/4" Bronze rotary gear pump with relief valve and close coupled to a 1 HP ODP motor.Use to pump oil and other viscous thick liquids.
1HP 115/230v ODP Learn More -
Oberdorfer Pumps
1.25" Bronze gear pump PEO
N1100
$1,410.001 1/4" Bronze rotary gear pump with relief valve and to be close coupled to a 1 HP 56C to 3HP 182TC motors of electric or hydraulic type.Use to pump oil and other viscous thick liquids as well as diesel and all the de-icing fluids. Uses such as ...
NO motor Learn More -
Oberdorfer Pumps
1.25" Bronze gear pump
N1100W-T98
$2,159.001 1/4" Bronze rotary gear pump with relief valve and close coupled to a 1 1/2 HP TEFC motor.Use to pump oil and other viscous thick liquids, De-icing fluids.
1.5HP 230/460v Learn More -
Oberdorfer Pumps
18 GPM CI GEAR PUMP & PED
18GB1111S
$1,226.00Medium duty CI gear pump with relief valve and pedistal for long coupling. Mechanical sealed, bronze bearings. CW rotation.b>Features:
- Shafts: Ground and polished steel.
- Helical Gears: For quiet running.
- Housing: Of close grain cast iron. Three...
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Hypro Pumps
Bronze gear pump
GPBN6V
$1,322.80Bronze pedestal mounted gear pump. For oils and other lubricating liquids. Excellent for water based fluids. Ryton PPS spur gears provide quiet operation and chemical compatibility. No metal to metal contact.1" Learn More -
Hypro Pumps
Cast Iron gear pump
BPCV6V
$823.9311 GPM Cast Iron pedestal mounted gear pump. For oils and other lubricating liquids. Not for use on water.