6
Installation
Pumps should always be carefully
unpacked and inspected. If any items
are missing or damaged, the freight
carrier and Zenith should be notified
immediately.
While the pump is composed of
stainless steel, it is a precision instrument.
Dropping or hitting the pump with a
non-yielding material can cause serious
damage to the components. All materials
are through-hardened to maximum
hardness resulting in a brittle material.
Treat them as you would any other precision
gaging instrument.
Zenith pumps are shipped filled with
mineral oil. If necessary, flush the pump
thoroughly with a cleaning solvent.
Prior to start-up, the pump must be
lubricated by either priming the pump
with the process fluid, or by pouring a
suitable lubricant into the inlet port.
Rotate the drive shaft until lubricant
appears at the discharge port.
The following is a general installation
procedure for Zenith B-9000 Series
metering pumps. The procedure may
vary slightly depending on the exact
model purchased. For special applications,
considerations, or technical assistance,
please contact our Applications
Engineering Group.
It is not recommended to flush
downstream process equipment utilizing
Zenith precision metering pumps. Most
fluids used as flushing agents, such as
solvents and water, have a low viscosity
and have poor lubricating qualities.
Catastrophic failure may occur
under certain operating conditions. If it
is necessary to flush the system, the
following suggestions are recommended
to prevent premature pump failure:
1.
If possible, flush the system using a
lubricating fluid.
2.
Minimize the differential pressure
across the pump ports to a maximum
of 25 psi.
3.
Reduce the pump speed to an
acceptable level (approximately
10 rpm)
4.
Flush the pump for the shortest
allowable time, yielding effective
cleansing of the system, and no
longer than necessary.
5.
It is recommended to use a bypass
around the pump as illustrated in
Figure A. This will allow for high
velocity flushing of the system while
minimizing risk to the metering pump.
During the flush cycle, fluid will pass
through and around the pump. This
will allow the system to be flushed
quickly and effectively.
To prepare the pump for use:
1.
Always flush the piping system
before
connecting it to the pump.
2.
Filters should be installed upstream
of the pump inlet port. The filter should
ideally be sized to one half of the
pumps gear clearances but, must not
restrict the flow of fluid to the inlet port.
3.
Turn pumps by hand before start-up
to ensure free rotation.
4.
For applications above ambient tem-
peratures, if using heaters, heat the
pump slowly and evenly (including
the seal arrangement) prior to
introducing fluid into the pump. This
prevents thermal shock and material
distortion.
5.
Make sure that process fluid is in the
pump before starting. Apply positive
pressure to the pump inlet when
metering high-viscosity fluids.
Start Up
1. Note: The pump should never be allowed
to run dry or be allowed to run with non-
lubricating fluids such as water.
Allow
enough time for all components of
the system to reach process
temperature before starting the
pump. Apply inlet pressure to the
pump, allowing time to ensure that
the process fluid has entered the
pump to provide lubrication for the
bearing areas.
Pump
Valve
Bypass
Figure A
Summary of Contents for B-9000 Series
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