Catalina Cylinders recommends the following
procedure for the valving of oxygen cylinders.
- Verify that the cylinder was manufactured for oxygen
service. Cylinders which have been manufactured for oxygen service by
Catalina Cylinders will have an "O" with a "2"
inside the "O" stamped on the crown of the cylinder.
- Inspect the inlet and outlet threads of the valve and
the threads and o-ring gland of the cylinder for damage to the threads
and o-ring area. If either the valve or cylinder has damage to the threads
or the o-ring area, do not insert the valve into the cylinder.
- Inspect the cylinder threads and the cylinder
internally verifying that the cylinder is free from any lubricants and
contaminants. Do not proceed it you feel the
cylinder may be contaminated.
- Catalina Cylinders recommends the insertion of a new teflon o-ring every time
the valve of a cylinder is removed and to be re-installed. Verify that
the teflon o-ring is
free of lubricants and damage.
- Catalina Cylinders has found it easiest to place the teflon o-ring in the o-ring
gland of the cylinder and then insert the valve into cylinder tightening
the valve hand tight.
- Final tightening should be done with a calibrated
torque wrench to the recommended torque of 75 lbf-ft.
- Close the valve with no more than 1 lbf-ft torque.
- Do not tamper with the safety device of the valve.
The safety device of the valve should be rated at the test pressure of
- Whenever replacing the safety device of a
valve, Catalina Cylinders recommends that you always replace the
safety device with a complete new safety device assembly.
- Always verify that the cylinder is empty prior to
attempting to replace the safety device of a valve.