Product Manual

4-23
7. Turn the pressure adjusting screw on the fuel regulator
counterclockwise until there is no pressure on the adjusting
spring and the screw turns freely.
8. Close the fuel control valve on the cutting torch.
9. All gauges should read zero pressure.
10. Leave the equipment connected and protect it from dirt, grease, etc.
11. Store in a well-ventilated area, away from heat or flames.
4.05 BUILT-IN FLASHBACK ARRESTORS
1. Many torches and handles are equipped with internal flashback
arrestors and reverse flow check valves. These models are
indicated by an “F” in the model name, for example, 315FC. The
flashback arrestor is designed to prevent flashback flame from
burning in the hose and gas supply system. A very fine “filter-like”
sintered stainless steel flame barrier stops flashback flame.
2. For maximum service life of the flashback arrestor, purge all
supply lines and hoses before installing the torch handle. This
removes loose material contained in the hose or regulator that
could restrict flow through the flashback arrestor.
3. Flow restriction and torch over-heating results if dirt or “oily”
LPG residuals are allowed to flow into the flashback arrestor.
Make sure not to draw liquid. Always store and use cylinders
in the upright position.
4. The flame arrestor element cannot be field tested or repaired. The
flame arrestor element must be replaced after a maximum of 5
years of service or whenever there are signs of discoloration of the
flame arrestor element caused by heat, poor torch performance
caused by restricted flow, signs of carbon soot in the torch inlet,
flame damaged or melted check valves, or if the flashback arrestors
have become loose in the body. If any of these conditions exist, have
the torch tested and repaired by a qualified repair technician.
5. If the torch is equipped with internal flashback arrestors it is not
advisable to use accessory flashback arrestors, as excessive
flow restrictions may occur.