4
Start-Up
Installation:
The following is a general installation
procedure for Zenith C-9000 Series
metering pumps. The procedure may
vary slightly depending on the pump
model purchased. For special applica-
tions, considerations, or technical assis-
tance, please contact your representative
or our Applications Engineering Group.
Things to remember
1.
The pump should be carefully
unpacked and inspected. If any items
are missing or damaged, the freight
carrier and Zenith should be notified
immediately.
2. Take Care!
- The pump is a precision
instrument. Dropping the pump on
a hard surface or striking the pump
with a hard object can cause serious
damage to the components.
3.
Treat the pump as a precision
gauging instrument.
4.
Always flush the piping system before
connecting the pump.
5.
Filters should be installed upstream of
the pump. For C-9000 pumps, the
fluid should be filtered to five (5)
microns, absolute.
6. Zenith C-9000 pumps must never be run
without a fluid.
C-9000 pumps contain
no lubricant when shipped from the
factory. Prior to start-up, the pump
must be wetted by priming the pump
with the process fluid, or by pouring
fluid into the inlet port and rotating the
drive shaft until fluid appears at the
discharge port. The product to be
pumped can be used as this fluid,
assuming it will not evaporate prior to
the pump actually being started.
Remove seal housing plug and fill
with compatable fluid. This will ensure
that the shaft seal is lubricated.
7.
Turn pumps by hand before start-up
to ensure free rotation before starting
the drive.
8.
For applications above ambient tem-
peratures, if using heaters, heat the
pump slowly and evenly (including the
seal arrangement) prior to introducing
hot fluid into the pump. This prevents
thermal shock and material distortion.
9.
Make sure that process fluid is in the
pump before starting. Apply positive
pressure to the pump inlet when
metering high-viscosity fluids to
prevent cavitation.
10.
Install a pressure regulating valve
downstream of the pump, if necessary,
to ensure there is at least 20 psig
differential pressure at all times.
Installing the pump
Install the selected fittings into the
inlet and discharge ports, taking care not
to over tighten the fittings. Mount the
pump to the base plate using the two
mounting screw holes on the bottom of
the front plate. Align the pump shaft to
the shaft on the gear reducer using a
shaft alignment gauge, laser alignment
mechanism, or by carefully using a
straight edge to control the coupling
alignment. Jaw-type couplings are not
recommended as shaft misalignment
must be controlled to within .008 inch
parallel and to within 1° angular. For
Zenith-supplied systems (pump, reducer,
baseplate, coupling, etc.), the shaft mis-
alignment should be controlled to within
.035 inch parallel and to within 1° angular,
but these values may need to be adjusted
depending on the particular coupling
chosen for your application. When
installing the coupling end member onto
the pump shaft, do not use excessive
force. This connection should be a slip fit.
If not, increase the inside diameter of the
coupling accordingly.
If your pump was designed to use an
outer drive gear, you must grease the
outer drive gear and carefully mesh it
with the drive pinion gear. A backlash of
.005” is recommended.
1.
Allow enough time for all components
of the system to reach process tem-
perature before starting the pump.
Apply inlet pressure to the pump,
allowing time to ensure that the
process fluid has entered the pump
to prevent the bearing areas from
running dry.
2.
Before starting, remove all flow
restrictions downstream of the pump
to provide initial operation with the
slightest amounts of back pressure.
3. Set the acceleration rate for the pump to
be 0.3 seconds/rpm or more.
Prior to
start-up, adjust the acceleration rate
of the controller to ensure initial slow
speed operation. This corresponds to
600 seconds to reach 2000 rpm, or .3
seconds/rpm.
