Tweco Victor Torch Handles,Cutting Attachments - Manual (Page 11)

3-7
7. Inspect the torch handle head, valves, and hose connections for oil,
grease, or damaged parts. Inspect the hose connections in the same
manner. Do Not use them if oil, grease, or damage is detected.
8. Inspect the torch handle. The tapered seating surfaces in the head
must be in good condition. If dents or burned seats are present,
the seat must be resurfaced. If the torch handle is used with poor
seating surfaces, backfire may occur.
9. Using a 3/4" open-end wrench, check the flashback arrestors
to make sure they are tight. If loose, a flashback may have
occurred.
10. Attach the hose to the torch handle and tighten securely with a
wrench.
3.02 weLDING setUp
1. Check the thickness of the metals to be welded. Prepare the metal
as described. Refer to the welding tip selection chart to determine
the tip size that is required and the regulator pressures for the
job.
2. Open the oxygen valve on the torch handle and adjust the oxygen
regulator to the required delivery range. Then close the torch handle
oxygen control valve to purge the oxygen hose.
3. Open the fuel valve on the torch handle and adjust the fuel regulator
to the required delivery range. Then close the torch handle fuel
control valve to purge the fuel hose.
warning
If the torch handle and hoses are already connected to the
regulators, the system MUSt still be purged after every shutdown
in a well-ventilated area. Open the oxygen valve 1/2 turn. Allow the
gas to flow ten seconds for tips up to a size three 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.
4. Wear the recommended protective goggles (shaded 5 or darker)
with tempered lenses to shield your eyes from the light. Wear
protective clothing as required.