8-3-2. Assembly
(1) Applying lubricating grease
Step 1 Apply a thin film (not more than 0.3 mm thick) of G40M silicone grease made by
Shin-Etsu Chemical Co., Ltd., as indicated in
Table 8-3, to the surface of all
gland packing material.
Step 2 Apply Plastilube No.3 grease made by the U.S. company Sulflo, Inc., as indicated in
Table 8-3, to the two backup O-rings, which are placed around the inner and
outer diameter of the packing follower.
(2) Assembling
Step Procedure
1
Check the correct direction of the gland stud bolts in
Figure 8-2. Apply anti-seizure
agent Never-Seez made by Bostik Inc. indicated in
Table 8-3 to the threads on the
stuffing box end, and screw the stud into the stuffing box.
Gland nut side
Taper side
Stung box side
Gland stud bolt end
with fewer threads
For PSA1/PSA2 (M8) For PSA3/PSA4 (M12)
Figure 8-2. Direction of the gland stud bolt
2 First, insert the spacer, paying extra attention not to damage the surface of the stem.
3 Insert one of the gland packing rings. Be sure to open the ring in the manner illustrated
in Figure 8-3. Insert the packing all the way to the bottom with a pipe, etc., and
push it lightly. Insert the remaining packing rings with the position of the gap shifted
by 180° each time.
Gland packing ring
Figure 8-3. How to open the gland packing ring
4
With reference to
Figure 8-1, check the correct mounting orientation of the pack-
ing follower (the outer O-ring should face the gland packing). Insert it, paying extra
attention not to damage the surface of the stem.
5
With reference to
Figure 8-1, insert the Belleville springs, paying extra attention not
to damage the surface of the stem.
8-3
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