TM 55-1520-240-23-6
7-283.5
TEST CARGO DOOR PRESSURE ACTUATED VALVE
(Continued)
7-283.5
RELIEF FUNCTION AND BLEED LEAKAGE
18.
Disconnect pressure hose from port B of valve
(2).
19.
Disconnect return hose from port A.
20.
Install test stand pressure hose (1) at port A.
21.
Install test stand return hose (7) at port B.
22.
Place graduate beaker (9) below shutoff valve
(10) at port B.
23.
Open shutoff valve (10) at port B.
24.
Slowly increase pressure at port A to 35 psig.
Leakage from port B shall be 20 cc per minute.
25.
Increase pressure at port A until port B flows at
100 cc per minute. Cracking pressure at port A
shall be 160 psig minimum.
26.
Increase pressure at port A until port B flows at
1.0 gpm. Rated flow pressure at port A shall
be 200 psig maximum.
27.
Reduce pressure to port A until flow at port B
is 100 cc per minute. Reseat pressure shall
be 160 psig minimum.
28.
Port A bleed leakage shall be 20 cc per minute.
7-1061