M Pumps CN SEAL-MV Series, User Manual

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Doc. ISM0076_MANUALE_CN SEAL-MV_ENG_REV04.DOCX Pag. 23/49
operation a sufficient length of time to assume its NORMAL operating temperature and conditions. If
the unit has been correctly cold set, parallel misalignment will be within 0.05 mm (0.002 in.) TIR and
the angular misalignment will be within 0.025 mm (0.001 in.) when in operation. If not make
adjustments.
15. INTENDED USE OF THE PUMP. IMPROPER USE. DESCRIPTION OF FUNCTIONING.PERSONAL
PROTECTIVE EQUIPMENT DURING USE.
15.1.
Intended use of the pump
The pump works correctly if the parameters specified in the APPENDIX B and paragraphs
“TECHNICAL DATA” are followed.
15.2.
Instructions for proper use reasonably foreseeable
Before starting work you must check that:
All maintenance actions were properly carried out according to the time intervals set by M PUMPS
PROCESS;
There are no damaged parts of the pump;
All the warning stickers and safety licence plates are present and in good condition and are operating the
emergency stop buttons (check through a test).
CAUTION
At the start, immediately check the pressure gauge placed in the discharge: if the
discharge pressure reaches the nominal value quickly, stop the pump and try
staring. Check the pump and piping to make sure that there is no leakage of liquid
from the plant. A noisy pump is a symptom of a malfunction that represent a
failure in the short term. A very low frequency and with a rumbling can indicate
the state of cavitation; an excessive noise of the motor can be caused by a wear of
a bearing.
15.3.
Not permitted use
While maintaining the conditions of use indicated in the paragraph “TECHNICAL DATA”, the ways in
which the pump should not be used are given here. To avoid damaging the pump, it is forbidden to use it
in the following conditions:
PROHIBITION

Start the pump dry: the pump casing must be full of liquid.

Run the pump dry for more than 1 minute;

Mare the pump work with inlet valve and /or outlet closed: the heat
generated by the impeller, by mechanical seal and bearings will boil
the liquid, which will cause pump cavitation/vibration, the impeller
damaging and the bearings collapse;

The pump flow should never be adjusted by the valve located in the
suction pipe, which must be kept fully open, start and or make the
pump work if there are losses;

Start the pump if there are losses;

Change working condition of the pump without having consulted
the
M PUMPS PROCESS Technical Office;

Loosen the pump connections while under pressure;