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P/N: A-522-C2-XX-SJ-SU, Rev. 0
Issue Date: August 6, 2020
Page 5 of 5
Remove the Teflon
®
packing (item 5) from the valve-stem bore. Avoid
scratching or gouging the interior surfaces of the valve-stem bore.
Figure 3-8 Remove Teflon
®
Packing
Remove ball seals (Item 10) and O-rings from body (Item 4).
Clean sealing surface for ball seals (Item 10) in both body (Item 4) and cap (Item 1).
Sealing surface should be clean and free of any imperfections per component inspections in 4.2 of A-520/522
IOM.
Wipe down one of the ball seals (Item 10) and then place it into the bottom seat
of the body valve (Item 4), flat side downwards. Be very careful to avoid
damaging the seat during installation.
Figure 3-9 Install Ball Seal
Install retaining ring (Part Number 522-18-MOL in Figure 3-3).
Clamp retaining ring and seals to Body and Cap and tack weld retaining ring in 6 places. See 522-100-INSTR
for reference.
TIP:
For valve assemblies using SS/TF seats, apply a thin layer of grease
(such as Panef Petrolatum) to the chafer portion of the seat (Item 10).