Specifications

TM9-2330-384-14&P
5-8. VAPORINTEGRITYTEST(Con't).
WARNING
Donotoverpressurizetank. Failuretoheadthiswarningmayresultindeathorinjury
to personnelor seriousdamagetoequipment.
NOTE
Thepneumatictest pressureinthe tankmustbe reachedgradually.
(11)
Make sure pressure regulator (24) is set to lowest setting (turn regulator knob (15) fully counterclockwise) to
avoid overpressure in tank.
(12)
Connect shop air pressure supply to pressure port (25) at pressure regulator (24).
b. PRESSURE TEST PROCEDURE
(1)
Open emergency valve (29), vapor vent valve (30), and precheck valve (31) using valve levers located in
roadside cabinet.
(2)
Open shutoff valve (16). Slowly adjust pressure
29
30
31
regulator(24) by turning regulator knob (15) clockwise
to increase flow of air into vapor return line and tank
until a pressure reading of 18.0 inches ±0.5 inchwater
column (wc) is obtained. Close shutoff valve (16).
(3) Wait five minutes to verify that pressure reading remains
stable at 18.0 inches ± 0.5 inch wc. Initial test pressure
must be at 18.0 inches ± 0.5 inch wc.
WARNING
Do not overpressurize tank. Failure
to heed this warning may result in
death or injury to personnel or
serious damage to equipment.
(4)
If tank is overpressurized, close shutoff valve (16) and
0
opendraincock valve (20) to reduce overpressure.
Close draincock valve (20) after tank pressure has
dropped to 18.0 inches ± 0.5 inch wc.
(5)
Atthe end of an additional five minutes, record the time
and final pressure. If pressure does not drop and tank
is leak free, go to step 6. If tank leaks more than 0.5
inch wc, repressurize tank per step 2 and then go to
step 6.
o
Change1
5-31