(2) New parts
When assembling or reassembling, for the parts indicated in the table below, be sure to use
new parts.
Table 9-2. Parts requiring replacement
Part name Checkpoints Possible problems
Gland packing (main pack-
ing and adapter packing)
Carbon ring
No flaws. No coating mate-
rials or dirt stuck to the
surface.
Any flaw, coating material, dirt, etc., may
cause leakage from that area, and the
specified seal performance may not be
achieved.
Belleville spring Any flaw, coating material, dirt, etc., may
cause insufficient tightening and leak-
age from the gland in a short period of
time, and the specified seal performance
may not be achieved.
(3) Lubricating grease and anti-seizing agent
Have an appropriate amount of the following lubricating grease and anti-seizing agent (or
equivalent) on hand.
Table 9-3. Lubricating grease and anti-seizing agent
Product name Applied area PTFE yarn Expanded
graphite
Krytox GPL207 fluoropolymer
grease made by DuPont Co.
Entire surface of the gland pack-
ing (main packing and adapter
packing)
Needed –
Plastilube No. 3 non-dripping
grease, made by Sulflo Inc.
Entire surface of the O-rings Needed Needed
Never-Seez anti-seizing agent,
made by Bostik Inc.
Threads of the gland stud bolts Needed Needed
Bottom of the gland nuts Needed Needed
9-4-2. Assembly
(1) Applying lubricating grease
Step 1 For PTFE yarn gland packing, apply a thin film of Krytox GPL207 grease, as
indicated in
Table 9-3, to the entire surface of all gland packing (main packing
and adapter packing). For expanded graphite packing, greasing is not necessary.
Step 2 For the gland packing system with two O-rings, which are placed around the inner
and outer diameter of the packing follower, apply Plastilube No. 3 grease made by
the U.S. company Sulflo, Inc., to both rings, as indicated in
Table 9-3.
9-3
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