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Page 164 • Catalog 207
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PUMPING PRINCIPLES
HOW IT WORKS:
a.)
Liquid enters the suction port (a) and is pushed forward by the blades of the impeller
(b) in an orderly circular flow around the periphery of the housing.
b.)
The circular liquid flow in the side channels (c) occur many times during one revolu-
tion resulting in 10 times or more discharge pressure than from a similar diameter
impeller turning the same speed in a centrifugal pump.
FEATURES:
High Head/Low Flow:
Produces high head at low flow without damaging pump
components
Continuous Duty:
Designed to run 24 hours a day, 7 days a week
Compact:
More compact than multistage centrifugals that deliver the same flow
and head
Entrained Air Handling:
up to 20%
a
b
c
REGENERATIVE TURBINE
HOW IT WORKS:
a.)
As the gears separate on the inlet side of the pump, cavities are created between the
gear teeth which create a vacuum that draws in the liquid.
b.)
Once the teeth clear the inlet port, the liquid is captured between the gear teeth
and the housing.
c.)
As the teeth mesh, the liquid is squeezed out of the cavity and forced out the
discharge port.
FEATURES:
Metering:
thin to viscous liquids can be dispensed in a smooth repeatable flow
High Pressure:
up to 500 psi can be achieved with low to high viscosity liquids
Clean Liquids:
close fitting gears require clean non-abrasive liquids
EXTERNAL GEAR
HOW IT WORKS:
a.)
The motion of the counter rotating rotors create a partial vacuum which draws the
liquid smoothly into the pump chamber.
b.)
As the rotors revolve, liquid is captured between the rotor cavities and the outer
housing.
c.)
The liquid is forced out the discharge as the rotors mesh and eliminate the cavities
the liquid occupies.
FEATURES:
Efficient:
Improved efficiency and sterilizability over the traditional lobe pump design.
Longer sealing surfaces ensure high volumetric efficiencies with thin liquids.
Solids Handling:
gentle low shear solids and abrasive handling
Wide Viscosity Range:
from 1 to 1,000,000 centipoise
LOBE
a
b
c
HOW IT WORKS:
a.)
Liquid enters the inlet port of the pump through gravity or priming and is directed
towards the center of the impeller.
b.)
The rotating impeller uses centrifugal force to add velocity to the liquid as it is slung
off the edges of the blades into the volute casing.
c.)
The volute configuration converts the velocity energy into static pressure or available
pump head as the liquid leaves the discharge port.
FEATURES:
High Volume Flow:
centrifugal pumps deliver a high volume of flow with smooth, non-
pulsating delivery
Low Maintenance:
wear due to operation is minimal, are easily disassembled and have
few moving parts
Low Power Consumption:
most efficient pump for moving large volumes of liquid
CENTRIFUGAL
a
b
c