High Volumetric Efficiency
Maximum efficiency is achieved
with optimum operating clearances
and assured under pressure by
built-in alignment dowels.
Minimum Pulsation
Unique design offers virtually pulseless
flow without valves or flexible elements
to hinder performance.
Precision Construction
Ground and lapped components for
close control of operating clearances.
Zenith
®
Pumps
2
Thoroughly read and understand this entire manual
before installation and operation of pump.
In 1926, Zenith Pumps was approached
by the synthetic fiber industry to design
a pump to provide a precise, pulseless,
repeatable flow and assure better quality
control. The options then were the same
as those in the chemical process industry
today–diaphragm, lobe, coarse gear, pis-
ton, plunger and screw pumps. Each had
problems with pulsation, flow inaccuracies,
multiple seal areas and slip, which required
constant calibration, high maintenance and
extended downtimes.
Zenith Pumps met the challenge and
designed a rotary external gear pump of
unique precision and simplicity.
Specifications
Pump Type:
Rotary external spur gear, single stream.
Rotation:
Refer to pump drawing.
Operating Speed:
3-180 rpm depending upon application conditions and
fluid viscosity.
Temperature:
To 645° F (350° C),
(950° F maximum with special fasteners and seals).
Manufacturing techniques were devel-
oped to hold tolerances to .00005", and
an inter-nal pressure relief mechanism
assured reliable precision metering. The
pump’s simple design of only three mov-
ing parts–two metering gears and a
drive shaft–provided long life and easy
maintenance.
For years since, Engineers have
relied on Zenith to provide precision
fluid handling solutions for their most
difficult pumping applications. Zenith
gear pumps can be found wherever
precise, pulseless, repeatable metering
of fluids is required.
High Accuracy
Stable, repeatable flows are assured
even under varying conditions of
pressure, viscosity, and temperature.
High Temperature Capability
Operating temperatures to
950° F (510° C).
Maximum Life
Only three moving parts; components
are through-hardened tool and die
steels to 62 HRc or better. Replaceable
sleeve bearings for low-cost rebuilds.
Benefits
