FREQUENTLY ASKED QUESTIONS
1. What gas pressures should I set my regulators to when using a National Torch?
The pressures required for proper operation are somewhat dependent on the size tip you are using, alongside other environmental conditions such as altitude. A good starting point for smaller tips would be: 3–8 psi for fuel, 7-12 psi for oxygen. For larger tips a good starting point would be: 10-15 psi for fuel, 15-30 psi for oxygen.
2. What is the best way to attach hoses to the barbs on a National Torch?
Since relatively high pressures can be supplied to the torch, it is imperative that the hoses be properly clamped to the hose barbs with reliable ferrules or clamps. If you need assistance, contact your local welding supply dealer, gas supplier, or National Torch to obtain the necessary hardware and equipment.
3. Why does the tip on my torch overheat?
All torches require the flow of gases in order to cool both the torch and tip. It is a common misconception that premix tips can be operated at very low flow (small flame) settings, and that if the tip appears to be getting hot, the fuel gas/oxygen flows should be reduced. THIS IS NOT TRUE. If, your tip begins to overheat when set at the desired flame/heat, SWITCH to a smaller tip for that work. A small flame on a larger tip will cause overheating, possible melting of the torch tip, and the increased possibility of flashbacks.
4. Can I order replacement parts for National Torches?
Yes, all parts can be purchased from National Torch by Premier Industries. Please see the torch operation instructions for a parts list or contact National Torch at 763.786.4020 or at sales@nationaltorch.com .
5. Can the amount of force to rotate the fuel/ oxygen (red/green) knobs on my torch be adjusted?
Yes, to a point. You can make a small adjustment to the fuel and oxygen knobs by either tightening or loosening the packing nut under the red or green knob. After an adjustment is made, be sure to check for leaks around the packing nut with soapy water before using. If a leak is found, tighten the packing nut.
6. After years of use, when I close the gas valve(s) on my torch, it does not completely turn off the flow of gas. Can this be fixed?
Possibly. The most common reason the flow of gas doesn’t completely shut off when the valve was turned off, is that foreign material got into the valve area of the torch. Try to purge the torch by opening the valve(s) and blowing compressed air through the torch to remove any foreign material that may have become lodged in the valve. In order to do this, you will need to remove the torch from the hoses and blow compressed air through the end of the torch where the hoses attach. You may need to reseat the valve by slightly over torqueing the valve, though please use caution when doing so, as too much force can strip the threads of the valve.
