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.
-
Oberdorfer Pumps
Rubber Impeller Bronze Pump
405M-04M35
$1,616.00Oberdorfer rubber (flex) impeller pump with solid cast bronze housing. Close coupled Rubber Impeller Pumps are made of high quality bronze for maximum corrosion resistance. The rubber impeller is mounted on a separate stainless steel shaft which i...
115v 3/4HP 1" TEFC Learn More -
Oberdorfer Pumps
Bronze Rotary Gear Pump 1"
N990H-T47
$2,068.001" Close coupled bronze rotary gear pump with motor. 1.5HP
- 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 mo...
1-1/2HP 115/230v 1" Learn More -
Oberdorfer Pumps
Bronze Rotary Gear Pump w/ motor
N990J-T47
$1,871.00Oberdorfer 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...
1-1/2HP 115/230v 1" Learn More -
Flojet Pumps
Diaphragm Demand Pump
4300-042
$237.00Industrial QUAD pump - Developed to deliver higher flows up to 5 GPM using a four piston design with excellent self-priming capability. 04300-042A Built-in pressure switch automatically starts and stops pump at its 45 PSI setting.Santoprene...
115v 3gpm FKM 40psi Learn More -
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 -
Oberdorfer Pumps
3/4" Bronze gear pump 1HP
N970H-N47
$2,394.003/4" Bronze rotary gear pump without relief valve and close coupled to a 1 HP 115v/1/60 1725 RPM TEFC motor.Pump housings and gears are made of top quality bronze, shafts are stainless steel 303. Bearings are made of high performance carbon-gra...115/230v ODP 1HP Learn More -
Hypro Pumps
316 Stainless Steel Gear pump
GMSV6C7T
$4,300.18Rotary Gear pump with motor. 316 Stainless construction, Ryton gears.
Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the back pressure in the discharge line. Shaft...
3HP 230V TEFC Learn More -
Jabsco Pumps
6050 Bronze Utility Pump Flexible Impeller
6050-0013
$1,376.88Flexible Impeller pump for general transfer pumping using 115V AC power where self-priming, 23 gpm flow and debris tolerance are required. Oil-resistant nitrile impeller is standard. Do not pump gasoline or other flammable liquids. DO NOT RUN D...115v 3/4HP TEFC Learn More