Maintenance - Atlas Copco JS Serie Instructions Pour L'utilisation Et L'entretien

12.1.3 Pumps with type TCW - TC8W mechanical seals
Never exceed the maximum speed shown on the pump name plate.
When the pump has primed:
- Check the shaft seal for leaks.
- Check that the current absorbed by the motor does not exceed the rated value shown on the name plate.
If the pump does not seem to be operating normally, it must be stopped and the cause found (see paragraph 15).
13

MAINTENANCE

Before maintenance is carried out, the pump must be stopped and the electrical supply disconnected. The supply must only be
switched on again by the person who carries out the maintenance.
Before carrying out maintenance on the unit, it is essential you:
- Disconnect the pump from the suction and delivery pipes.
- Drain liquid from the pump casing by means of the drain cover (fig. 5)
Attention: residual liquid may be found in the pump casing, head and suction line. Take the necessary precautions if the liquid is
hazardous, inflammable, corrosive, poisonous, infected, etc.
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Type TCW, TC8W mechanical seals are flushed according to API 610 Plan 52-53 (see diagram in
fig. 8).
Plan 52 has a non-pressurised tank.
Plan 53 has a pressurised tank with a pressure from 1 to 2 bar higher than the pump operating
pressure.
The flushing liquid must be compatible with the pumped liquid.
fig. 8
fig. 9
12.2 Filling the pump casing
Fill the pump casing completely with the liquid to be pumped through the opening on the top of
the casing (fig. 9). Some models have a plug. When the pump is stopped, the casing does not
empty and therefore it is not necessary to refill it.
12.3 Priming
Attention: if the pump does not prime, do not operate it for more than 2 minutes to avoid
overheating the liquid and damaging the seal.
If the pump does not prime, read paragraph 14.1.
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fig. 10