Alfa Laval 881176-09-01/1, Instruction Book

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4 Trouble shooting 4.4 Noise
4.4 Noise
4.5 Low outlet flow
4.6 Insufficient
separation result
Possible cause Action
Incorrect assembly. Dismantle and assemble correctly.
Motor bearings are damaged. Fit new bearings.
Vibration dampers are worn. Fit new dampers.
Possible cause Action
Too low flow rate of feed. Check the feed line - increase the flow rate.
Too high counter pressure at outlet. Reduce the counter pressure (100 - 200 kPa is
recommended).
Leakage caused by incorrect
assembly.

The three screws fastening the frame hood or the paring
disc knob (the upper part of the separator) are not
completely tightened.

Dismantle and check the separator bowl parts. Especially
check that no O-rings are missing, are defective or
incorrectly fitted. Ensure that the separator is assembled
correctly.
Separator rotates in wrong direction. Connect the electrical connections properly.
Possible cause Action
The liquid feed rate is too high. Reduction of the feed rate improves the separation result.
The counter pressure is too low. Increase the counter pressure until oil is observed to be
discharged from the oil outlet.

Recommended counter pressure is 100 - 200 kPa.
The separator disc stack is clogged. Clean the separator bowl and disc stack.

Shorten the cleaning interval.