Ideal RNI Serie Manual De Uso Y Mantenimiento página 33

Bombas Ideal, S.A.
ANOMALY
4. The pump drains after
starting.
5. The stuffing box drips too
much.
6. The pump vibrates.
7. The bearings get too hot.
CAUSE
4.1 Excessive suction head.
4.2. Air taking through the stuffing
box.
4.3. Air taking through the suction
line
4.4. NPSH r < NPSHd
5.1. Lack of packing, this is worn
or not appropriate.
5.2. Shaft worn, stuffing box bush
scratched.
5.3. Mechanical closure worn.
6.1. Foundations faulty.
6.2. Faulty alignment.
6.3. Impeller imbalanced through
breakage or partial
obstruction.
6.4. Shaft bent.
6.5. Air in the liquid.
6.6. Cavitation.
7.1. Faulty alignment.
7.2. The pipelines produce
tensions in the pump.
7.3. High axial thrust.
7.4. Bad lubrication, low quality
grease, too much grease, lack
of oil.
SOLUTION
4.1. Apply 1.5.
4.2 Apply 2.7
4.3. Apply 1.7.
4.4. Reduce the NPSHr of the pump,
increase the NPSHd of the system,
enquire at technical service.
5.1. Add packing. Fit the right sort.
5.2. Grind the shaft or box bush. Change
the axle or change the box bush.
5.3. Replace with a new one.
6.1. Correct the fault.
6.2. Check the alignment.
6.3. Change the impeller, clean the
impeller.
6.4. Straighten the shaft or replace this
with a new one.
6.5. Bleed the air from the liquid or
prevent it from getting into the pump.
6.6. Change the operating conditions of
the pump in the installation. Enquire
at our technical service.
7.1. Correct the alignment.
7.2. Eliminate the tensions by loosening
the pipeline.
7.3. Clean the impeller compensation
holes. Adjust the set of sealing rings.
7.4. Use good quality grease, and use
the recommended amount of grease.
Replace the oil levels.
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