Water-Cooled Micro Torch Setup: 14 Series 140A Guide

Quick Answer

Install the 14 Series 140A water-cooled micro torch by connecting the 35 Dinse power plug, 5/8-18 RH gas fitting, and 5/8-18 LH water fittings in the correct order to avoid leaks and overheating.

14 Series Water-Cooled Micro Torch Setup Steps

1. 1. Connect the 35 Dinse Power Connection: Insert the 1/2" twist lock (35 Dinse) plug into your TIG welder's power receptacle. Twist clockwise until it locks firmly. A loose connection causes arcing and voltage drop. Check that the Dinse connector is fully seated and locked before powering on.
2. 2. Attach the 5/8-18 RH Gas Fitting: Screw the 5/8"-18 right-hand gas fitting onto your torch gas inlet. Use a wrench to snug it hand-tight plus a quarter turn. Overtightening can crack the fitting or damage the O-ring. Apply a small amount of PTFE tape to the threads to prevent gas leaks.
3. 3. Connect the 5/8-18 LH Water Fittings: Attach the 5/8"-18 left-hand water fittings to the torch's water inlet and outlet. Note the LH thread direction—turn clockwise to loosen, counter-clockwise to tighten. Mixing up the flow direction reduces cooling efficiency. Label the water hoses 'in' and 'out' to avoid confusion during future maintenance.
4. 4. Purge the Water Circuit: Turn on the water cooler and let coolant flow through the torch for 30 seconds. Check for drips at every connection. A slow leak may not show until the torch heats up. Place a dry paper towel under each fitting to detect small leaks.
5. 5. Purge the Gas Line: Open the gas cylinder valve and set flow to 15-20 CFH. Press the torch trigger or use the gas purge function on the welder. Listen for steady gas flow and check for gas odor at the nozzle. A gas leak wastes shielding gas and causes weld porosity. Use soapy water on fittings to confirm no bubbles.
6. 6. Test the Torch on a Scrap Piece: Set your welder to 100-120A DCEN. Strike an arc on clean scrap steel. The water-cooled torch should run cool even after 30 seconds of continuous welding. If the torch gets hot quickly, check water flow rate. If the torch overheats, increase cooler flow or reduce amperage until the system stabilizes.

Product Details

• 14 Series (140A) Water-Cooled Micro Torch w/35 Dinse Power Connection, 5/8"-18 RH Gas Fitting, & 5/8"-18 LH Water Fittings: The 14 Series (140A) water-cooled micro torch uses a 1/2" twist lock (35 Dinse) connector, a 5/8"-18 RH gas connection, and 5/8"-18 LH water fittings. It includes clear Pyrex nozzles for better visibility. The 35 Dinse connector ensures a secure power link to your TIG welder, while the separate gas and water fittings prevent cross-threading and leaks during setup.