6 Commissioning/Start-up/Shutdown
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CHTRa
5. Adjust the throttle valves in the supply lines of the thrust and radial bearings of
the pump with the help of auxiliary pressure gauges.
6. Screw the auxiliary pressure gauges in the throttle valves.
7. Secure the adjustment of the throttle valves with locking screws.
8. Switch off the oil supply unit or auxiliary oil pump, remove the auxiliary
pressure gauges and close the connection carefully.
6.2.13 Priming the pump and piping
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.
CAUTION
Increased wear due to dry running
Damage to the pump (set)/bearings!
▷
Never operate the pump set without liquid fill.
▷
Never operate the pump set in incompletely primed or incompletely vented
condition.
▷
Never close the shut-off element in the suction line and/or supply line during
pump operation.
ü
All preparatory measures have been completed.
1. Close all drains and drain lines.
2. Completely open the cooling water main valve and all cooling water throttle
valves.
3. Vent the entire cooling water circuit.
4. If applicable, vent the entire barrier fluid system of the mechanical seal.
5. Monitor the cooling water flow by means of sight glasses and/or flow indicators.
NOTE
Do not cool down cooling chambers and heat exchangers with aggressive raw
water.
6. If fitted, check the filter in the barrier fluid system of the mechanical seal. Clean
it, if required.
7. Open the valves in the minimum flow system.
8. Check the oil levels and top up with oil, if required.
9. Fully open the valve in the inlet pipe.
10. Fill the inlet pipe, pump and discharge pipe with the fluid handled. If the
discharge pipe is equipped with a check valve, the shut-off element in the
discharge pipe may remain open as long as there is some back pressure.
11. Vent all pressure gauge lines until there is no more air to escape.
12. Fully open the shut-off element in the inlet pipe.
13. Check whether inlet pressure is available.
