Alfa Laval PureBallast 135 Compact USCG, System Manual

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Valve V201–3, V201–9, V201–19, V201–31 and V201–8
Follow the steps below
1. Set the valve to closed position from the control system. Control the
position indicator, to make sure. The yellow position indicator is in line with
the valve throttle (indicating open when the position indicator is in line with
the pipe).
2. Disconnect power and instrument air. Verify that the valve is not under
pressure.
3. Open the padlock (2*) on the actuator and remove the safety cover (1*)
from the bolts (3, 4).
4. Measure exactly how far out the end stop bolt (4) is from a reference
surface, for example the actuator house. Make a note of the distance. This
information is needed when unlocking the valve.
5. Open the locking bolt (3) and turn them a couple of turns.
6. Screw the end stop bolt (4) to its bottom position and tighten the locking
bolt.
7. Verify that the valve cannot be opened.
8. Slide the safety cover over the end bolts and lock the safety cover with the
pad lock.
9. Repeat the above procedure for all valves concerned.
7.8.4 Unlock valve
Follow this instruction to unlock valves from closed position.
* Safety cover (1) and padlock (2), not on all valves.
Preparations and conditions
• Note that the end positions of the end stop bolts are factory adjusted and
should normally not be readjusted.
Valve V201–3, V201–9, V201–19, V201–31 and V201–8
Follow the steps below
200000695-1-EN-GB 314
7 Service manual EN