TIG Regulators FAQs
Practical answers on choosing, setting up and looking after an argon regulator for TIG welding.
What argon flow rate should I set for TIG welding?
There is no single figure. Maker guidance links flow to the welding current and the size of the gas nozzle, so start from the torch or machine maker's chart for your set-up. Smaller nozzles and lower currents need less; larger nozzles and higher currents need more.
Larger gas lens cups can need more again, so follow the torch maker's data where it exists. Run a test weld and adjust. If you are unsure, our team can help you match a regulator range to your torch and work.
Is more gas always better for TIG shielding?
No. Too much flow causes turbulence, which can pull air into the gas stream and contaminate the weld, so turning the flow up is not a cure for poor shielding. Too little flow leaves the weld exposed, which often shows as a dull bead, small holes or crater-like pits, or blue, purple or straw discolouration on stainless steel.
Set the flow for your nozzle size and current, then check for draughts and leaks before changing it again.
How accurate is the flow reading at the torch?
The reading at the regulator is a guide rather than a guarantee of what leaves the nozzle. Makers of nozzle-end flow testers note that the actual flow at the torch can differ from the setting, particularly with long gas hoses.
If consistent shielding matters, a flow test device fitted at the nozzle shows the real flow. If it reads much lower than the regulator setting, check for a leak, a kink or a blockage between the regulator and the torch, and follow the torch maker's guidance.
How do I open and shut down the regulator safely?
Check the regulator is the right one for the gas, that its inlet and threads are undamaged and clean, and that the cylinder is secured upright. Wind the adjuster off before opening the cylinder valve. Do not stand directly in front of or behind the regulator, open the valve slowly until gas starts to flow in, then open it fully.
When you finish, close the cylinder valve and let the pressure drain until both gauges read zero, then wind the adjuster off. Never remove a regulator while either gauge shows pressure. Keep the cylinder valve closed whenever the regulator is not in use.