6 Commissioning/Start-up/Shutdown
30 of 64
KWP-Bloc
6.1.4 Priming and venting the pump
DANGER
Risk of potentially explosive atmosphere inside the pump
Explosion hazard!
▷ The pump internals in contact with the fluid to be handled, including the seal
chamber and auxiliary systems must be filled with the fluid to be handled at all
times.
▷ Provide sufficient inlet pressure.
▷ Provide an appropriate monitoring system.
DANGER
Risk of potentially explosive atmosphere by mixing of incompatible fluids in the
auxiliary piping
Risk of burns!
Explosion hazard!
▷ Make sure that the barrier fluid or quench liquid are compatible with the fluid
handled.
DANGER
Shaft seal failure caused by insufficient lubrication
Hot or toxic fluid could escape!
Damage to the pump!
▷ Before starting up the pump set, vent the pump and suction line and prime
both with the fluid to be handled.
CAUTION
Increased wear due to dry running
Damage to the pump set!
▷ Never operate the pump set without liquid fill.
▷ Never close the shut-off element in the suction line and/or supply line during
pump operation.
1. Vent the pump and suction line and prime both with the fluid to be handled.
Connection 6D can be used for venting (see drawing of auxiliary connections).
2. Fully open the shut-off element in the suction line.
3. Fully open all auxiliary feed lines (barrier fluid, flushing liquid, etc.), if any.
4. Open the shut-off element, if any, in the vacuum balance line and close the
vacuum-tight shut-off element, if any.
NOTE
For design-inherent reasons some unfilled volume in the hydraulic system cannot be
excluded after the pump has been primed for commissioning/start-up. However,
once the motor is started up the pumping effect will immediately fill this volume
with the fluid handled.
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