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Wipe down the second ball seal (item 10) and then place is into the seat of
the cap plate (item 1) with the flat side downward. Be very careful to avoid
damaging the seal during installation.
TIP:
For valve assemblies using SS/TF seats, apply a thin layter of grease
(such as Panef Petrolatum) to the chafer portion of the seat (item 10).
Figure 4-27 Install Ball Seal
Wipe down the large Teflon valve-body seal (item 11) and install onto the
body (item 4).
Place the cap plate (item 1) with seal (item 10) onto the valve body (item 4).
Figure 4-28 Install Seal on Cap
Orient the cap plate (item 1) so the name plate (item 14), or its holes,
straddles the valve stem (item 2).
TIP:
Next, fully open the valve with a wrench.
Figure 4-29 Name Plate Holes
Orientation
Apply two (2) drops of Locktite
®
(medium or equivalent) to the threads of four
(4) hex-head cap screws (item 9) and then screw them into the four (4)
counter bore holes.
TIP:
Apply Locktite
®
to cap screws.
Figure 4-30 Install Cap Screws
Name Plate Holes
9
11
4
3
1
10
A-520/A-522/A-522A
, Rev. 3.0
