Flow Thru Gas TIG Torch 25 Dinse Setup Guide

By MIG/TIG/Stick Welders & Plasma Cutters | USA Weld – HTP ... | Published: 2026-10-30

Category: How-to Guides

Learn how to set up a flow thru gas TIG torch with a 25 Dinse connection. Step-by-step instructions for the 17 Series 150A air-cooled torch.

Quick Answer

To set up a flow thru gas TIG torch with a 25 Dinse connection, align the torch plug with the welder's Dinse socket, tighten the locking ring, and connect the gas line to the flow thru fitting. Then check for leaks before welding.

Why Flow Thru Gas Matters

A flow thru gas TIG torch simplifies your setup by routing shielding gas through the power cable itself. This eliminates a separate gas hose, reducing clutter and making the torch easier to maneuver. The 17 Series (150A) air-cooled torch with 25 Dinse and flow thru gas is designed for welders who want a clean, single-cable setup without sacrificing gas delivery.

Trade-Offs of Air-Cooled Torches

Air-cooled torches like the 17 Series are lighter and more portable than water-cooled models, but they have a duty cycle limit. At 150A, you may need to pause between welds to let the torch cool. For heavy continuous welding, a water-cooled torch might be a better choice. But for general fabrication and maintenance work, the 17 Series offers a good balance of weight and performance.

Setup Steps

Inspect the Torch and Cable: Before connecting, check the torch cable for any cuts, kinks, or damage. Ensure the 25 Dinse plug is clean and free of debris. A damaged cable can cause gas leaks or power loss. A quick visual inspection prevents most setup issues.
Connect the Dinse Plug: Align the 25 Dinse plug with the welder's power socket. Insert it fully, then tighten the locking ring clockwise until snug. Do not overtighten, as this can damage the threads. Ensure the plug is fully seated before tightening to avoid a poor electrical connection.
Connect the Gas Line: Attach the gas hose from your regulator to the flow thru gas fitting on the torch. Use a wrench to snug the fitting, but avoid over-torquing. A loose connection will cause gas leaks and poor weld quality. Check the fitting with a soapy water solution to confirm no leaks.
Set the Gas Flow Rate: Open the gas valve on the regulator and set the flow rate according to your welding requirements, typically 15-20 CFH for TIG. Adjust based on the material and joint type. Too low a flow rate can cause porosity; too high can create turbulence.
Test the Torch: With the welder on, press the torch trigger and verify gas flows from the nozzle. If you have a gas lens, check for even gas distribution. Listen for any hissing that indicates a leak. Always test before starting your weld to ensure everything is working correctly.

Product Facts

17 Series (150A) Air-Cooled Torch w/25 Dinse & Flow Thru Gas: The 17 Series (150A) air-cooled TIG torch features a one-piece cable design with a flexible silicon rubber hose and nylon braided weave overlay. This flexible cable stays pliable even in cold weather, making the torch easier to position and reducing operator fatigue during long welding sessions.
17 Series (150A) Air-Cooled Torch w/25 Dinse & Flow Thru Gas