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
Bronze Pedestal Gear Pump w/ relief valve
N7000R
$1,044.00Bronze Pedestal Gear pump with relief valve. Often used as a oil pump on large ships to pre-lube the bearings. Pump flow is reversible.- Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid...
3/4" Packed Learn More -
Oberdorfer Pumps
Bronze Rotary Gear Pump & Motor
N61K10G-01F02
$555.00PUMP AND MOTOR. No relief valve.This Bronze Rotary Gear Pump is popular among OEM users. It is a diesel fuel transfer pump featuring an all bronze design and 303 stainless steel shafts with options of non-metallic gears and a variety of sha...
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Oberdorfer Pumps
Magnetic Drive Pump
SM1031ECM
$4,025.28Designed to handle highly corrosive liquids that must be pumped under pressure. The Chemsteel pump prevents system contamination while maintaining the purity and integrety of the liquid being pumped. Key attributes include:Slotted bearings to lu...
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Oberdorfer Pumps
Magnetic Drive Pump
SM1031BCM
$3,889.20Designed to handle highly corrosive liquids that must be pumped under pressure. The Chemsteel pump prevents system contamination while maintaining the purity and integrity of the liquid being pumped. Key attributes include:Slotted bearings to...
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Oberdorfer Pumps
Magnetic Drive Pump
SM1033BCM
$6,358.80Designed to handle highly corrosive liquids that must be pumped under pressure. The Chemsteel pump prevents system contamination while maintaining the purity and integrety of the liquid being pumped. Key attributes include:Slotted bearings to lu...
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Oberdorfer Pumps
N991 Oberdorfer PUMP & MTR.
N991-F41
$753.00Glycol circulation Pump by Oberdorfer is just one of hundreds of applications. 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 selec...1/3HP 115 Learn More -
PumpBiz
WOBBLE STATOR PUMP & 3 phase MOTOR
APM-44CSFM-3
$4,394.78Liberty Pumps are backed by over fifty years of progressive cavity pump product sales and technical service experience. American Pump Series Progressive Cavity Pumps are designed with a singular helical rotor that eccentrically turns within a dou... -
Oberdorfer Pumps
N991 Oberdorfer Bronze gear pump & motor
N991-32F41
$753.00Oberdorfer Bronze gear pump & motor. 3/8" 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 ser...115v 3/8" Learn More -
Pumptec
200PSI Spray Sytem 12V
80326
$477.86Spray Pump Module 200 PSI. Basic Sprayer Pump System easily converts spot sprayer to a high-performance 200 PSI sprayer for tree spraying, ditch and fence line spraying, plus eave/overhand spraying. 114T PumpTec Pump, Nylon Body, FKM O-rings, Tefl...12VDC spray system Nylon body Learn More -
Hypro Pumps
Cast Iron Gear pump 3/8
GMCV3VA4
$1,826.07Rotary Cast Iron Gear pump 3/8". 303 SS fasteners, steel gears.
Adjustable relief valve designed for internal pressure relief, can be ported for either internal or external discharge. Do not operate the relief valve for more than one minute.
Use...
1HP 3/8" Learn More