Page 378 - The Tribology Handbook

c2 - 1 Selection of oil pumps

Table 21.2 Comparison of the various types of pump
Gear pump
Spur gear relatively cheap, compact, simple in design.
Where quieter operation is necessary helical or double
helical pattern may be used. Both types capable of handling
dirty oil. Available to deliver up to about 0.02 m3/s
(300 g.p.m.).

Lobe pump
Can handle oils ofvery viscous nature at reduced speeds.

Screw pump
Quiet running, pulseless flow, capable of high suction lift,
ideal for pumping low viscosity oils, can operate continu-
ously at high speeds over very long periods, low power
consumption. Adaptable to turbine drive. Available to
deliver up to and above 0.075 m3/s (1000 g.p.m.).

Vane pump
Compact, simple in design, high delivery pressure capa-
bility, usually limited to systems which also perform high
pressure hydraulic duties.

Centrifugal pump
High rate of delivery at moderate pressure, can operate
with greatly restricted output, but protection against
overheating necessary with no-flow condition. Will handle
dirty oil.

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