Adjustment Of Gland Packing; Replacement Of Gland Packing - EBARA GS Instruction Manual

3. Adjustment of gland packing・・・For gland packing type
For gland packing specification, make sure the water leakage is moderate according to Table 2. Prevent
over tightening and uneven tightening gland packing from happening. If the water leakage could not be
adjusted, there might be a deterioration occurring at shaft seal parts. Therefore, it is necessary to
exchange gland packing or both gland packing and shaft, and then adjusting the water leakage value.
(1) The tightening of gland packing
(a) Tightening nuts of gland bolts to the extent to which hand-cranked becomes heavy.
(b) Make sure that there is no uneven tightening happening when tightening nuts of gland bolts.
(2) Adjustment of gland packing during operation of pump
(a) During initial operation of pump, the water leakage value is more than normal operation
(Table 2). To take 10 to 30 minutes' running-in of pump and making sure that you are aware
of the fever, abnormal noise.
(b) During normal operation of pump, do not make the water leakage value to 0 mL/min.
(c) After running-in of pump, adjusting the water leakage value is moderate according to Table
2.
(d) Checking table of the water leakage value（as a standard）.
You can also check
diameter of gland packing
(e) When the water leakage value is huge,
value to normal value. However, if you
prone to fever. Therefore, you should tighten gland packing gradually at 10 to 30 minute
intervals.
4. Replacement of gland packing・・・For gland packing specification
Do replacement of gland packing under the situations below.
(1) The disassembling of pump happens, such as a periodical inspection
(2) There is no more space for tightening of gland packing.
(3) The water leakage value could not be adjusted.
(4) When a significant damage or dents (0.7mm or more for one side) occurs to the shaft surface, shaft
should be exchanged for new.
(5) Replace gland packing with new packing, shifting joints from 90 to 120 degrees until last joint is on the
bottom.
Table 2 The water leakage value (as a standard）
Inner diameter of
gland packing operation
（mL/min）
(mm)
33
43
53
60
70
80
inner diameter of gland packing
of model 32-125 is 33 mm: Refer to Table 5.)
- 14 -
Initial Normal
operation
（mL/min）
70 33
86 43
106 53
120 60
140 70
160 80
from Table 5.(For example, inner
tightening gland packing to adjust
tighten gland packing in a short time,
the water leakage
pump might be