TM 5-4310-275-14
(11). Screw adjusting screw (2) into body. Screw
to observe dimensions specified for approach and
stem (3) into adjusting screw.
f. Test and Adjustment.
exit sections.
(1) Install pressure relief valve in test setup
(5) If required relief valve operation cannot
(2) Close bleed valve. Adjust pressure
be obtained by adjusting stem, change setting of
regulator to apply a gradually increasing air
adjusting screw installed in valve body, and
pressure to approach section. Relief valve should
repeat complete test and adjustment procedure.
open (i.e., air flow from leakage tube exceed three
Final setting of adjusting screw and stern must
cubic centimeters per hour) before applied
allow installation of 0.025 inch (.0635 cm)
pressure reaches 3600 psig (253.08 kg per sq cm).
diameter stainless steel safety wire and lead seal
(3) If relief valve fails to open, remove
as in original valve configuration.
collector cup, adjust stem of valve a small
amount, replace collector cup, and repeat test.
(6) Close pressure regulator, open bleed
Repeat alternate adjustments and tests until
valve to relieve air pressure in test setup and
relief valve opens, as indicated by a minimum air
disconnect pressure relief valve from test
flow of 0.6 scfm, with an approach section
equipment.
pressure of 3300 to 3500 psig (231 .990 to 246.05
g. Installation.
kg per sq cm) maximum.
(1) Install a new tube fitting gasket into the
(4) Close pressure regulator and open bleed
groove at the root of the valve body mounting
valve slightly to slowly relieve air pressure in
boss (fig. 6-1).
approach section. Pressure relief valve should
(2) Install the pressure relief valve.
close (reseal) before approach section pressure
drops below 3100 psi (217.9300 kg per sq cm) as
a. General. The check valve is installed in the
indicated by pressure gage.
