Azbil HLS Series - Page 100

11-8
(2/2)
Step Procedure
2
By tightening the gland nuts to the torque indicated in Table 11-4 or Table 11-5, the
top of the packing flange and packing follower will be at almost the same level, as
illustrated in Fig. 11-6 below (the level may not be exactly the same due to the
tolerance of the Belleville springs and friction on the gland studs or gland nuts).
If the Belleville springs are mounted in the wrong direction, or if the gland nuts are
tightened to a torque that does not comply with the torque specified in Table 11-4
and Table 11-5, the level of the top of the packing flange and packing follower will
not be the same (see Fig. 11-7). Check if the direction of washers of the Belleville
springs and the tightening torque are correct.
Gap No gap
Before tightening Tightened to the specied torque
Fig. 11-6. Load on Belleville springs (correctly assembled)
There is a gap even after tightening
Fig. 11-7. Load on Belleville springs (incorrectly assembled)
3
View the assembly from above to check that the space between the stem and the
packing follower is even (see Fig. 11-8).
Packing follower
Stem
Packing ange
Gland stud
Space
Fig. 11-8. Top view