G. Extended Storage
Appendix G—Extended Storage
Procedures
If your Coro-Flo pump is to be removed from service
for some time, the pump must be protected, as
propane, butane and anhydrous ammonia all leave
the metal “bare” and open to corrosion. Piping and
tanks not in service should also be protected, as the
rust that forms can destroy the pump’s seals almost
immediately after startup.
1. Fill or thoroughly flush the pump with a light rust-
inhibiting oil. (If the pump is flushed with oil, placing
some desiccant packets inside the pump will
provide added protection.)
2. Plug all pump openings.
3. Store in a dry location.
4. Before placing the pump back into service, drain
the oil and remove any desiccant packets.
5. Refer to “Operation of Your Coro-Flo
®
pump” on
page 8.
Symptom
Probable Cause
Remedy
Noise or
vibration in the
pump (continued)
Defective or wrong size
By-pass valve
Confirm the size of the by-pass valve required for your application.
Inspect, repair or replace the valve.
Loose anchor bolts
Tighten all pump’s anchor bolts.
Electric motor
gets hot or
overload
protection kicks
out
High differential pressure
Check the motor’s full load amperage. Adjust the by-pass valve
setting to a lower setting. See recommendations for low capacity
due to high differential pressure.
Low line voltage
Check line voltage when in operation. Be sure motor is wired for
the proper voltage. Check the electric motor’s nameplate.
Starter overload
Heaters too small
Check the motor load with an ammeter and confirm the heater size
with the starter’s manufacturer.
Motor shorted
Totally Enclosed Fan-Cooled electric motors (TEFC) and explosion
proof electric motors are subject to moisture condensation inside
when used intermittently. To eliminate moisture you might allow the
motor to operate at least once a week until it get sufficiently hot to
evaporate the moisture.
Leaks
Failed O-rings or
mechanical seal assembly
Inspect and replace the seals and O-rings, if needed.
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