Tweco Victor Torch Handles,Cutting Attachments - Manual (Page 17)

5-13
4.02 cUttING coMpLetIoN
1. Shut off the oxygen preheat valve. Then, close the torch fuel valve.
Be careful not to shut off the fuel valve first, this may create a “pop"
type sound. When the “pop” happens it throws carbon soot back
into the torch and may in time partially clog gas passages and the
flashback arrestors.
2. Close both cylinder control valves on the gas source supply.
3. Open the oxygen valve and depress the cutting oxygen lever.
Release the pressure from the system and then close the oxygen
preheat and the torch handle oxygen control valve.
4. Turn the adjusting screw on the oxygen regulator counterclockwise
to release all spring pressure.
5. Open the torch fuel control valve and release the pressure from
the system. Close the fuel valve.
6. Turn the adjusting screw on the fuel gas regulator counterclockwise
to release all spring pressure.
7. Check the inlet gauges after a few minutes to ensure the cylinder
valves are turned off completely and no pressure remains in the
system.
8. Remove slag left on the cut edge with a chipping hammer or brush.
Never remove slag from the cut edge with the torch head or cutting
tip.
sectIoN 5:
check vALves AND FLAsh ARRestoRs
5.01 ReveRse FLow check vALves
The body “Y” has two control valves attached to it. The valve bodies are
marked to distinguish between the two valves. The body of one valve has
left-hand threads to accept the fuel gas hose. The other valve body has
right-hand threads to accept the oxygen hose. The control valves never
require lubricating. Occasionally, the packing nuts may require a slight
adjustment.
Most VICTOR
® torch handles are equipped with patented built-in reverse
flow check valves to reduce the possibility of mixing gases in the hoses
and regulators.