35
The system piping has been cleaned.
Pump, suction line and inlet tank, if any, have been vented and filled with the
fluid to be pumped.
The filling and venting lines have been closed.
Observe the following when heating up the pump (set) and keeping it warm:
. Make sure the temperature is increased continuously.
. Max. heating speed: 10 °C/min (10 K/min)
If the pump is used for handling fluids with fluid temperatures exceeding 150 °C, make sure
that the pump has been sufficiently heated throughout before starting it up.
The temperature difference between the pump,s surface and the fluid handled must not
exceed 100 °C (100 K) when the pump is started up.
6.1.9 Heating up/keeping warm the pump (set)
6.1.10 Start-up
C AUTION
Pump blockage
Damage to the pump!
Prior to pump start-up, heat up the pump as described in the manual.
DANG E R
The permissible pressure and temperature limits will be exceeded if the pump is
operated with the suction and discharge lines closed.
Explosion hazard!
Leakage of hot or toxic fluids!
Never operate the pump with the shut-off elements in the suction line and/or
discharge line closed.
Only start up the pump set with the discharge-side gate valve slightly or fully
open.
DANG E R
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.
Prime the pump as specified. (
Section 6.1.4 Page 32)
Always operate the pump within the permissible operating range.
C AUTION
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.
C AUTION
Start-up against open discharge line
Overloading of the motor!
Use a soft starter.
Use speed control.
Make sure the power reserve of the motor is sufficient.
6 Commissioning/Start-up/Shutdown
Fluid temperatures
above 150 °C
Temperature
difference
