Off Service And Demolition; Troubleshooting; Possible Causes - Rovatti Pompe MEKV50C Série Manuel D'utilisation Et D'entretien

Elettropompe monoblocco multistadio
Close-coupled multistage electric pumps
Electropompes monobloc multicellulaires
Mehrstufige monoblock Kreiselpumpen
Electrobombas monobloque multicelulares
10.

Off service and demolition

In case of dismantling and demolition, the pump components are not so dangerous and do not require special precautions. In order to facilitate
recycling, all materials composing electrical system and thermoplastic components shall be separated from the machine.
INFORMATION TO USERS - under Article 13 of Law 25, July 2005, n° 151 "Implementation of Directives 2002/95/EC, 2002/96/EC and
2003/108/EC: Restriction of the use of certain Hazardous Substances in electrical and electronic equipment and Waste of Electrical
and Electronic Equipment"
Suitable separate collection, followed by decommissioned pump recycling, treatment and environmentally-sound disposal, helps to avoid
possible negative effects on health and the environment and promotes re-use and/or recycling of the materials of which the equipment is made.
Owners who dispose of the product illegally will be liable to the administrative penalties envisaged by the regulations in force. In case of off
service and demolition, follow scrupulously the local antipollution norms. Proceed to the differentiated disposals according to the following brief
list of the different materials composing the pumps in the standard version.
Impeller - Diffuser - Pump body - Motor body
Shaft - Screws - Tie rod
Wear ring - Bushing - Bearing
Electric cable - Winding
DON'T WASTE THE ENVIRONMENT WITH OUT OF USE MATERIALS
11.

Troubleshooting

It is important to always check that the installation complies with current regulations and that the operating conditions
comply with the specifications for which the pump was purchased (refer to the identification plate fixed on the machine). The
following is a diagram indicating the most frequent faults and their possible causes / remedies. For any further information
contact the Rovatti Service Centres.
Faults
Blocked pump
Pump does not prime
Insufficient capacity
Insufficient pressure
Excessive power
absorption
Gland packing drips
excessively
Pump is noisy
and vibrates
30
MGEMM205R3

Possible causes

Rusted moving parts due to long stop period
Foreign particles inside the pump
Partial priming due to air inside the pump or suction pipes
Defective or clogged footvalve that cannot close and that does not allow
the pipe and pump filling
Air leaks in the suction pipe
Excessive suction head (too low NPSH)
Wrong rotation direction
Clogged or badly functioning footvalve
Inadequately dimensioned suction pipe or footvalve
Worn or clogged impeller
Worn impeller wear rings
Excessive suction head (too low NPSH)
Water contains gas
Suction pipe with curve upwards where air collects
Air leaks into the suction pipe
Pump functions with characteristics other than the rated data
Internal friction of moving parts
Too tight gland packing
The shaft or bush are worn near the gland packing
Packing not suitable for the conditions of use
Unbalanced moving parts, worn motor bearings
Not securely fixed pump and pipes
Scarse or excessive capacity for the chosen pump
Functioning in cavitation
EN
Cast iron - Bronze - Stainless steel
Steel - Stainless steel
Bronze - Brass - Rubber - Stainless steel - Technopolymer
Copper - Plastic material
Remedies
Check, repair or replace
Check, remove the obstruction
Remove air in the pump through the breather holes
Clean or replace the footvalve
Locate and eliminate air passage
Reset head of dynamic level, reduce capacity or replace the pump with a suitable
model
Exchange two of the three phases
Disassemble, clean or replace
Disassemble and replace with a more suitable pipe
Disassemble, clean or replace
Disassemble the electric pump and repair. Caution! Follow instructions foreseen in
the warranty conditions
Reset head of dynamic level, reduce capacity or replace the pump with a suitable
model
Contact ROVATTI engineers
Eliminate critical point respecting the requested inclination to the suction pipe
Locate and eliminate air passage
Check the working conditions requested by the plant and replace the pump if
necessary
Disassemble and repair. Caution! Follow instructions foreseen in the warranty
conditions
Adjust tightening
Disassemble and replace
Disassemble and replace the damaged components
Disassemble and replace the damaged components
Overhaul the installation
Replace the pump with one of suitable performances
Reset head of dynamic level, reduce capacity or replace the pump with a suitable
model
Manuale d'uso e manutenzione
Instructions for use and maintenance
Manuel d'utilisation et d'entretien
Betriebs-und Wartungsanleitung
Manual de uso y mantenimiento