User's Manual

Post-Discharge Maintenance
September 2013 7-4 P/N 81-CO2MAN-001
Note: The tightening torque on the valve seat is 2200 in./lb.
12. Place CO
2
cylinder on weigh scale and secure to prevent movement of cylinder during
recharge.
13. Install recharge adapter, Part No. WK-933537-000, to the valve control port.
14. Fill cylinder with required weight of CO
2
.
15. After cylinder is full remove recharge adapter, ensure that all CO
2
fill valves are closed and
check cylinder for leakage. Allow time for cylinder to return to room temperature before
conducting the leak test. The areas that should closely be examined are the pilot port, the
discharge port, the safety outlet and the valve to cylinder threads.
If leakage is discovered at the pilot or discharge port:
a. Empty the cylinder and valve assembly of CO
2
.
b. Replace the main check and the pilot check assemblies (if not already replaced from
step 7).
c. Repeat steps 8 through 12.
If leakage is detected at the safety outlet, check torque on nut (350 in./lb. maximum).
If leakage persists at safety outlet:
a. Empty cylinder and valve assembly of CO
2
.
b. Remove safety outlet nut.
c. Replace safety disc and washer (white disc Part No. 81-902048-000 for 1/2-inch
valve, and red disc Part No. 81-903684-000 for 5/8-inch valve).
d. Install safety outlet nut and tighten to maximum torque of 350 in./lb.
e. Repeat steps 9 through 12.
Note: The Compressed Gas Association recommends that the safety disc and washer be
replaced when the cylinder is hydrotested.
If leakage is discovered at the valve threads make sure the valve is tightened into cylinder.
If leakage continues from the threads:
a. Empty cylinder and valve assembly of CO
2
.
b. Remove valve.
c. Examine threads of valve and cylinder; if threads are damaged replace valve.
d. Clean threads of valve and cylinder and re-tape valve threads with Teflon tape.
e. Install valve into cylinder.
f. Repeat steps 9 through 12.
If any leaks persist, replacement of the valve is necessary.
7-3.2.1 CO
2
CYLINDER LEAK TEST
1. Leak test cylinder either by immersing in water using a bell jar over the valve to check for
leaks. Water temperature should not exceed 100°F (38°C), or apply a soap solution to all
pressure connection(s) and observe for bubble leaks.
WARNING
The red safety disc is set to rupture at a higher pressure than the white disc.
The red disc is designed for use on the 75 lb. and 100 lb. cylinders only. Use of
the red disc on the 25, 35 or 50 lb. CO
2
cylinders will pose a safety hazard to
personnel and property.