Chapter 4—Operation of the Z-Series
Stationary Coro-Vane
®
Pump
Performance curves and charts are provided in Appendix C.
The following steps should be performed for the initial
pumping operation:
1. Verify the strainer screen is clean.
2. Rotate the pump by hand.
3. Check V-belt drive or direct drive coupling alignment.
Misalignment will cause accelerated wear of the drive
system, motor bearings, and pump.
4. Check motor for proper wiring.
5. Review complete system to make certain the function
of every valve and piece of equipment is clearly
understood. Everyone operating this system must be
properly trained in normal operating procedures and
emergency procedures in event of a malfunction.
6. Close all hose valves.
7. Slowly open the storage tank bottom shut-off valve
(suction line to the pump). Immediately check the
system for leaks.
8. Open any shut-off valves between the bypass valve
and the storage tank.
9. Make a note of all pressure gauge readings, especially
the pressure gauge located at the discharge of the
pump. Start the pump and circulate the liquid through
the bypass system back to the storage tank.
10. Verify the proper pump rotation direction. There is an
arrow cast in the pump case.
11. An ampmeter may be used by adjusting the bypass valve
until the ampmeter indicates the full load motor amperage
rating shown on the motor nameplate or maximum rated
differential, whichever comes rst. Permit the pump
to circulate liquid for half an hour or more. If the motor
overload protection device stops the motor in this period
the bypass valve setting is too high and should be
readjusted until the motor will run for half an hour. After a
satisfactory setting is achieved, “seal” the valve adjusting
stem to prevent tampering with the adjustment. See
Important Instructions (IH102) and Installation, Operation
and Maintenance (IOM) Manual (IH106) for more details
on the use of the Corken bypass valves.
12. Your pump has an internal relief valve, it must be set
higher than the external bypass setting. The internal
relief valve is factory preset.
13. After initial operation, re-check the strainer screen.
Figure 4.1
10
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