TM5-4220-231-14&P
NOTE
Lubricate threads
before reassembly
with halocarbon
grease (Item
13, Appendix D).
a. Disassembly
Instructions
(1)
Unscrew and remove nut (13) from stem (5).
(2)
Remove spring (12), handle (11), and spacer (10) from stem (5).
(3)
Unscrew and remove packing gland nut (7) with stem (5) from valve body (2).
(4)
Remove stem (5) from packing gland nut (7).
(5)
Remove spacer (9) from packing gland nut (7).
(6)
Remove, cut, and discard O-ring (8) from packing gland nut (7).
(7)
Remove packing (6) from packing gland nut (7).
(8)
Remove seat assembly
(4) from valve body (2).
(9)
Remove pressure/temperature
relief valve (3) from valve body (2).
b.
Reassembly
Instructions
(1)
Screw pressure/temperature
relief valve (3) to valve body (2).
(2)
Screw seat assembly
(4) back into valve body (2).
(3)
Replace stem (5) in valve body (2), making certain bottom of stem is positioned in slot in seat
assembly (4).
(4)
Place packing (6) in packing gland nut (7).
(5)
Place new O-ring (8) in packing gland nut (7).
(6)
Screw packing gland nut (7) into valve body (2) over stem (5).
(7)
Place spacer (9) in packing gland nut (7).
(8)
Place spacer (10) on top of packing gland nut (7).
(9)
Place handle (11) on top of spacer (10).
(10) Place spring (12) in handle (11).
(11) Screw nut (13) on exposed end of stem (5) over spring (12).
(12) Conduct required tests to ensure proper operation of the flask valve.
5-36
