CK Water Cooled Torches FAQs
Practical answers on running, caring for and choosing parts for water-cooled TIG torches and their cable sets.
What does a water-cooled TIG torch need in order to run?
A water-cooled torch needs a separate cooler (a pump, tank and radiator) that circulates coolant through the torch head and back along the power cable. The cooler is normally connected to the welding machine, so check that yours is designed for the torch and the machine.
Some coolers include flow detection intended to stop the torch overheating if flow is lost, but check whether yours has it and do not rely on it alone. Water cooling is usually chosen for higher-current or long-duty work, but always check the torch's rating and duty cycle on its data plate and in the manual.
Which coolant should I put in a water-cooled TIG torch?
Use the coolant the torch and cooler manufacturers specify, normally a purpose-made torch coolant. Plain tap water is not suitable because scale and algae can build up and block the small passages in the torch head.
Do not use car antifreeze, which can thicken and clog the lines. Distilled water is, at most, a short-term emergency measure. Do not top up a pre-mixed coolant with water, as that changes its mix and its protection against freezing. If you are unsure, follow the cooler manual.
How often should I check or change the coolant and look after the cooler?
Check the coolant level regularly, ideally each day the cooler is used. Keep the cooler clean and blow dust off the radiator fins with compressed air (with the power off), more often in dusty workshops.
There is no single change interval for every coolant. Some low-conductivity coolants need changing more often than others, so follow the schedule in the cooler and coolant instructions. Discoloured, cloudy or slimy coolant is a sign it needs attention.
What should I check before striking an arc with a water-cooled torch?
Switch on the cooler and machine and look over the hoses and fittings while the coolant is flowing under pressure. Check for drips at the torch head, handle and connectors, and make sure all fittings are tight and nothing is cracked, bulging or kinked.
Also confirm the hoses are connected the right way round, so coolant reaches the torch head first. If you find a leak or the torch is running hot, stop and fix it before welding. Do not weld with a torch that is leaking or overheating.