Page 451 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair

Steam Turbines and Turboexpanders 429

When the system is not under pressure nor in service, the reservoir
may be filled using the inspection hole on either end of the reservoir.
When the reservoir is pressurized, oil may be added by using a filler
Pump.
After filling all components, such as cooler or filters, ascertain that the
lube oil reservoir is filled to a point between maximum and minimum
levels, as specified by the equipment manufacturer.

If the reservoir needs flushing, do not use a detergent-containing oil.
The regular lube oil is suitable for flushing.

Prestart Instructions

The following steps must be taken before putting the system into opera-
tion:

Check the shaft alignment between oil pumps and drivers. These are
usually aligned at the factory but may have become misaligned during
transit.
Verify that the accumulator bladder is charged to the correct pressure
level specified by the manufacturer. To charge the accumulator bladder
before putting the machine in service:

1. Isolate the accumulator from the oil system by closing the block
valve.
2. Open drain valve.
3. Connect a suitable vendor-provided charge kit to the filling valve
on top of the accumulator.
4. Fill with nitrogen gas to the required pressure level.
5. Close the drain valve.
6. Slowly reopen the block valve.

Note: If the lube system is pressurized, follow special instructions given
by the expander manufacturer.

Verify that all electrical circuits are properly connected and that mo-
tors operate in the proper rotation.
0 Verify that there are no shorts to ground in any sensor line.
Verify that all valves are in the correct open or closed position.
Again verify that all gauges, controls and safety devices are properly
connected, set and operative. Don’t forget to ascertain correct lube
oil operating temperature and pressure readings, and monitor all
other control settings. Note that although settings were made at the
factory, they may have drifted during transit.