TM 5-4310-344-34
valve is actuated, allowing the air pressure to force
d. Close pressure regulator and open bleed
them from the shell. An element in the moisture
valve slightly to slowly relieve air pressure in approach
separator traps particles suspended in the air. A rupture
section. Pressure relief valve should close (reseal)
disc in the cap protects the assembly.
before approach section pressure drops below 3350 psig
as indicated by pressure gage.
2-26.
e. If required relief valve operation cannot be
obtained by adjusting stem, change setting of adjusting
a.
Unscrew cap (1) and remove from shell
screw installed in valve body, and repeat complete test
(2).
and adjustment procedure. Final setting of adjusting
screw and stem must allow installation of 0.025 inch
b.
Remove preformed packing (3) from the
diameter stainless steel safety wire and lead seal as in
cap.
original valve configuration.
c. Remove screw (4),
washer
(5),
and
f.
Close pressure regulator, open bleed valve
element (6). Discard gasket (7).
to relieve air pressure in test setup and disconnect
pressure relief valve from test equipment.
d. Cut the tape 'securing heater blanket (10)
to the shell.
2-25. MOISTURE SEPARATOR. High pressure air in
e.
Remove retainers (8) and rupture discs (9).
the moisture separator causes moisture and oil vapor to
condense and settle to the bottom of the shell. These
f.
Do not remove thermostat switch (11) from
impurities are removed when the dump
the shell unless a new switch is required. The switch is
press fit in the shell and will be damaged if removed.
Figure 2-3. Pressure Relief Valve Test Set-Up
2-7
