Product Manual

3-12
3.05 TORCH INTERNAL CHECK VALVE TEST
1. Adjust both regulator pressure adjusting screws so no pressure
is delivered.
2. Connect both hoses to the torch.
3. Disconnect one hose from the regulator.
4. Open all torch pre-heat control valves.
5. Plug the end of the tip.
6. Adjust the regulator that is NOT DISCONNECTED until a 2-5
PSIG reading appears on the low pressure gauge.
7. Put the end of the hose that IS DISCONNECTED from the
regulator under water or cover the end of the hose with an
approved leak detector solution.
8. Wait 15 seconds for trapped air to escape. Bubbles will develop
if the check valve is leaking. There should be no more than three
bubbles in 10 seconds.
9. If the check valve leaks, reconnect the hose to the regulator.
Unplug the tip. Flush for 3-5 seconds with 10 PSIG fuel gas, or
30 PSIG oxygen, depending on the check valve tested.
10. Retest the check valve. If the check valve still leaks, replace it
with a new one.
11. Test the other check valve. Reconnect the hose that was
disconnected for the first test. Disconnect the other hose.
12. Repeat steps 4 through 10.
13. After both check valves test good, purge both the oxygen and
fuel lines before igniting the torch.
NOTE
If you remove an internal check valve for any reason, you
should clean it thoroughly and test it after reinstallation.