6 Commissioning/Start-up/Shutdown
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Vitaprime
DANGER
Excessive temperatures due to dry running or excessive gas content in the fluid
handled
Explosion hazard!
Damage to the pump set!
▷
Never operate the pump set without liquid fill.
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Prime the pump as per operating instructions.
▷
Always operate the pump within the permissible operating range.
CAUTION
Abnormal noises, vibrations, temperatures or leakage
Damage to the pump!
▷
Switch off the pump (set) immediately.
▷
Eliminate the causes before returning the pump set to service.
ü
The system piping has been cleaned.
ü
The pump, suction line and inlet tank, if any, have been vented and primed with
the fluid to be handled.
ü
The lines for priming and venting have been closed.
CAUTION
Start-up against open discharge line
Motor overload!
▷
Make sure the motor has sufficient power reserves.
▷
Use a soft starter.
▷
Use speed control.
1. Fully open the shut-off element in the suction head/suction lift line.
2. Close or slightly open the shut-off element in the discharge line.
3. If a mechanical seal with flushing system is used, make sure that the flushing
liquid circulates properly.
4. Start up the motor.
5. Immediately after the pump has reached full rotational speed, slowly open the
shut-off element in the discharge line and adjust it to comply with the duty
point.
6. When the operating temperature has been reached and/or if there is any
leakage, check the clamping ring/screw connection between casing and casing
cover. If required, re-tighten it.
6.1.5 Checking the shaft seal
Mechanical seal
The mechanical seal only leaks slightly or invisibly (as vapour) during operation.
Mechanical seals are maintenance-free.