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use and maintenance booklet - safety instructions
2.7 Inspections and maintenance of pumps
The inspections and maintenance of the pump shall be executed in compliance with the criteria of the IEC 60079-17 standard.
The electrical connection terminals must be tightened fully to avoid high contact resistances and consequential overheating.
Care must be taken to ensure that the insulation distances on air and on the surfaces between the conductors are maintained, as established
by the standards.
Replacement of gaskets and cable entry parts shall be executed using components that are identical to the components supplied by the
manufacturer to ensure the protection degree is maintained.
2.8 Repair of classified areas pumps
Repairs made to spark protected pumps shall be executed in compliance with the criteria specified by IEC 60079-19 standard, by certifications
and by this manual.
If repairs are not executed by the manufacturer, they must be carried out at workshop which have the necessary equipment and with
adequate technical expertise concerning the pump protection methods and must be supervised by qualified and authorized personnel.
If repair work involves parts that influence the protection against explosions, the pump construction data must be not changed (e.g.: cable
entries, winding characteristics, etc.) and if parts have to be replaced, this must be done with original components.
Standard IEC 60079-19 foresees various typologies of intervention that have different impacts on the integrity of the equipment submitted to
maintenance; the possible activities are synthesized below:
1. Repair: action to restore to a faulty apparatus to its fully serviceable condition and in compliance with the relevant standard (relevant
standard means the standard to which the apparatus was originally designed);
2. Overhaul: action to restore to a fully serviceable condition an apparatus which has been in use or in storage for a period of time but which
is not faulty;
3. Maintenance: Routine actions taken to preserve the fully serviceable condition of the installed apparatus;
4. Reclamation: means of repair involving, e.g., the removal or addition of material to reclaim component parts which have sustained
damage, in order to restore such parts to a serviceable condition in accordance with the relevant standard;
5. Modification: change to the design of the apparatus which affects material, fit, form or function.
Producer supports the activities of:
1. Reparation
2. Overhaul
3. Maintenance
but doesn’t authorize interventions of:
1. Reclamation
2. Modification
Possible constructive modifications can be performed, in the respect of the ties of the certificate, only by the manufacturer.
A written report must be prepared by repairer with a detailed indication of the work carried out.
After a repair work has been properly completed, an additional nameplate shall be affixed to the pump (without removing the original one)
showing the following marks:
•
Symbol R
•
Name or trademark of the repairer
•
Reparation number by the repairer
•
Date of repair
In case of reparation modify relevant aspects concerning protections against explosions and pumps does not comply with the certificate, the
original nameplate must be removed and the pump can no longer be used in areas where there is a danger of explosion.
Unless of re-examination and approval by a competent certification body.
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