Unibloc-Pump UNIBLOC-PD 501, Руководство по эксплуатации и обслуживанию

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UNIBLOC-PD Operation & Service Manual: PD501-576 25
PROBLEM POSSIBLE CAUSE SOLUTION
D. Rotors gall, pump seizes 1.
Liquid temperature too high.
2. Rotor clearances incorrect.
3. Loose rotor bolts/housing studs.
4. Bearings worn.
5. Gears worn.
6. Foreign particles in pump.
7. Particles in product too large.
8. Discharge pressure too high.
1. Lower temperature or increase
rotor clearances.
2. Adjust to factory recommended
clearances.
3. Tighten or replace if necessary.
4. Replace bearings.
5. Replace gears.
6. Install suction side filter.
7. Increase rotor clearances. Use
plastic rotors. Increase pump
size.
8. See B-4.
E. Pump is noisy.
1. Cavitation.
2. Liquid contains air.
3. Discharge pressure too high.
1. See C.
2. Check pump shaft seals for
leaks. Check suction side pipe
fittings for leaks. Increase
NPSHA.
3. Check suction and discharge
piping for closed valves or
obstructions. Increase pump
size.
F. Motor overheating
1. Motor size too small.
2. Discharge pressure too high.
3. Viscosity higher than expected.
4. Motor & pump misalignment.
1. Increase motor size.
2. Lower pump speed. Lower
pressure. Check suction and
discharge piping for closed
valves or obstructions.
3. Decrease pump speed. Increase
pipe size or shorten discharge
pipe length.
4. Correct alignment.
G. Shaft seals leak.
1. Worn parts.
2. Seals have been operated
without product in pump.
3. Seal incompatible with liquid.
1. Replace seals and/or o-rings.
2. Operate pump only when liquids
can come in contact with seals.
Replace worn seal parts.
3. Contact factory for proper seal
selection, operation, and replace
if necessary.