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ISM0210 Instruction Manual of series SCE - Rev.03
By carrying out the functions mentioned in the previous section and all controls listed in the register
maintenance, the pump is ready for use.
Self-priming pumps and non self-priming pumps
SCE pumps are self-priming: Make sure the pump is always filled with the pumping liquid to maintain the self-
priming feature. Use a back flow check valve to stop reverse flow when operating with suction lift, dry run shall
be avoided.
INTENDED USE OF THE PUMP. IMPROPER USE. DESCRIPTION OF
FUNCTIONING.PERSONAL PROTECTIVE EQUIPMENT DURING USE.
Intended use of the pump
The magnetic drive pump, thanks to its decoupling between the pump and the motor, never enters into direct
contact with motor parts, providing a friction effect on the impeller of the pump. The pump works correctly if the
parameters specified in the paragraph “TECHNICAL DATA” are followed.
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
;
−
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
Do not dry run the pump!
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.
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 magnetic coupling 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;
−
try to clean the pump while it is running;
