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AEC/Appllcation Engineering
9. Incorrect head position.
E. Pump takes too much power.
1. Runs too fast - check for correct motor speed, reducer ratio, sheave size, etc.
2. Liquid more viscous than the pump can handle. Heat the liquid, increase the pipe size,
slow the pump down, or get a bigger motor.
3. Higher than calculated discharge pressure - check the pressure gauge. Increase the
size, decrease the length of pipe, reduce speed/capacity, or get a bigger motor.
4. Packing gland is drawn down too tight.
5. :'viisaligned pump.
6. Clearance on pumping elements may not be sufficient for operating conditions. Check
parts for evidence of drag or contact in the pump, and increase clearance where
needed.
F. Rapid wear.
•
On most applications, the pump can operate for a long time before it gradually loses the
ability to deliver capacity or pressure. You would see a smooth, even wear pattern on pump
parts when examining such a pump. Rapid wear is indicated by deep, heavy grooving,
galling, twisting, breaking, or similar signs of trouble.
•
Note the following table for rapid \\ear indications:
..
•
,Symptom:-.J.~
·
;;~-Possible
cCauseF<_.
··.~"I ~~.:-r
· · : ...
Solutlon··>r,
.:<"~:·
. . ,;.
Flush the system after you
remove the pump, using AEC
Gouges or marks made by
TrueFlush ™ flushing fluid or
large, hard particles; a rapid
equivalent. Install a strainer in
wearing of bushings from
Abrasives
the suction line. Dirt and other
very small abrasives similar
contaminants are usually
to pumice: or anything in
flushed out of the system in a
between.
few days. If the pump is
rebuilt into good condition,
it
should last for a long time.
•
Page 66
TOH TrueTemp™ Series Hot Oil Temperature Control Units
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