Tweco Victor Torch Handles,Cutting Attachments - Manual (Page 15)

4-11
7. Follow cylinder and regulator safety and operating procedures.
8. Open the oxygen valve on the torch handle completely.
9. Open the preheat oxygen control valve on the cutting attachment
and adjust the oxygen regulator to the desired delivery pressure.
This will purge the oxygen hose.
10. Close the preheat oxygen control valve.
11. Open the fuel valve on the torch handle and adjust the fuel regulator
delivery range. This will purge the fuel hose.
12. Close the fuel control valve on the torch handle.
13. Momentarily depress the cutting oxygen lever to purge the cutting
oxygen passage in the cutting attachment.
warning
If the torch handle and hoses are already connected to the
regulators, the system MUST still be purged after each shutdown.
Open the oxygen valve 1/2 turn. Allow the gas to flow ten seconds
for tips up to size 3, and five seconds for sizes 4 and larger for
each 25 feet of hose in the system. Close the oxygen valve and
purge the fuel system in the same manner.
note
Always wear protective clothing and proper goggles to shield your
eyes from infrared light.
14. Open the fuel valve on the torch handle approximately 1/8 turn
and ignite the gas with a spark lighter. Be sure the spark lighter is
away from the tip and not obstructing the gas flow.
15. Continue to increase the fuel supply at the torch handle until the
flame stops smoking.
16. Slowly open the preheat oxygen control valve on the cutting
attachment until the preheat flame is established with a smooth
inner cone.
17. Depress the cutting oxygen lever. If necessary, readjust the preheat
flames slightly to a neutral flame by increasing the preheat oxygen
at the cutting attachment until the preheat flames are again neutral.
If the preheat flames are not the same size and the cutting oxygen
is not straight, turn off the torch and let it cool, then clean the tip.