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TM 9-254
3-18.
Set Up of Purging and Charging Equipment - Continued
(6)
Slowly rotate pressure regulator valve (4) clockwise until approximately 5 psig is registered on the low
pressure gage (1). Check for and eliminate any interference; close pressure regulator valve (4).
b.
Set Up of Two Station Pressure Test Fixture (fig. 3-46). Set up the two station pressure test fixture as
follows:
(1
Place a tank of dry nitrogen (5) in a vertical position in the back of the fixture so that the tank is lodged in
the structural steel "V" formation of the fixture and secure with the strap and clamping screw
arrangement provided.
(2)
Secure pressure regulator (12) to the tank. Make certain pressure regulator valve (13) is turned
counterclockwise to off. Open nitrogen tank valve (3) until maximum tank pressure is indicated on the
high pressure gage (2).
(3)
Connect hose assembly (9) to regulator (12) and open manifold valve (10).
CAUTION
At no time should the pressure be permitted to exceed 15 psig. Pressures greater than 15 psig
could damage the unit.
(4)
Open transfer valve (8) by pulling it to the outermost position.
(5)
Close test fixture valves (4), and insure low pressure gage (1) indicated 0 psig.
(6)
Open pressure regulator valves (13) until low pressure gage (1) indicates 15 psig.
(7)
Open test fixture valve (4) until test fixture gages (11) indicate(s) proper pressure.
(8)
Close manifold valve (10) and check pressure reading on test fixture gage (11).
(9)
Remove stopper (7) from outlet pipe (6). Open manifold valve (10) and check the pressure on test
fixture gage (11). Adjust fixture valve (4) if necessary.
(10) Close manifold valve (10) and attach feeder tube to outlet pipe (6).
3-45
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