DMN-WESTINGHOUSE AL-BL Rotary Valves
Code: AL-E.B.01.B 11-2012
17
3.1.3.2 Rotor shaft sealing
Standard executions are :
- shaft sealing with gland packing;
- air purge with gland packing;
- air purge with lip seal.
Access rotating part, mind your fingers.
3.1.3.2.1 Shaft sealing with gland packing
412 Stud
413 Nut
414 Washer
421 Gland follower
431 Gland packing
433 Plug
Fig. 3.1.3.2.1 Gland sealing.
Gland seals
In case of gland seals by means of gland packing it is necessary before starting the
system to fasten the gland in order to set the gland packing in such a way that it seals
and the rotor will be able to run.
Adjustment of the gland packing seals should be made with the unit in stationary
condition. The gland follower should be tightened up evenly and only to prevent
leakage. The necessity of good gland maintain is very important to prevent
contamination and also unnecessary wear.
If normal adjustment is insufficient to prevent leakage or overheating, the gland
packing should be completely renewed.
Replace the gland packing as follows:
- Withdraw gland follower (421) and pull these against the ball-bearing place.
Remove the old gland packing using a suitable packing extractor tool.
Examine shaft journal for wear. Excessive wear or scoring in this
area will reduce the effective life of the packing.
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