12
Removing mechanical seal MVG - 5
Follow firstly operations explained before.
The mechanical seal is kept in place by a joint, removing the joint the complete seal is free
to be cleaned or changed. Clean it thoroughly using a little warm water.
Remove it from the drive shaft with care by using your hands only. No tools are required for
this operation. It is easy to damage the mechanical seal so be careful!
Problems, causes and remedies
Type of motor is not correct for the local
Check motor and power supply.
A foreign body could be located inside the
Open the pump, verify situation and
eventually take away the foreign body.
The stator is not resistant to the pumped
Check quotation and relative order. Replace
the stator with the correct type for the
Liquid pumped is settling out in the pump.
Clean the pump every time you stop it.
Temperature too high and the stator is
Lower the liquid temperature. In case this is
not possible, contact our technical personnel.
Suction pipe work is open to atmosphere.
Check all gaskets and tighten all the nuts,
Replace the stator according to this manual.
Replace the rotor according to this manual.
Verify if it has worn due to abrasion or
corrosion. Change material.
Mechanical seal is leaking.
Replace the seal according to this manual.
Performance under standard
Electric motor is undersized or the incorrect
Check that the correct motor has been
voltage is being applied.
ordered and installation is correct.
Too high pressure on delivery pipe work.
Measure by a pressure gauge and reduce
Air in the suction pipe work.
Check and tighten all screws in the suction
Mechanical seal is leaking.
Sometimes pump is running dry.
Fill up the casing, install protective device
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