21K78 - ESAB Purox Style Throat Mixer for W-300 Handles

Get Your Flame Back on Track

If your Purox W-300 torch is sputtering, popping, or just not holding a consistent flame, the problem might be deep inside the handle. The ESAB 21K78 Throat Mixer is the part you need to get that smooth, hissing neutral flame back. This isn't just a piece of brass; it's the heart of your torch's gas management system. It takes your oxygen and your fuel gas and blends them perfectly before sending them to the tip. When your mixer is clogged or worn out, no amount of knob twiddling is going to fix your flame, but a fresh 21K78 will.

We know that in the shop, equipment durability is everything. That's why this ESAB mixer is built tough. It handles the heat without warping and resists the corrosion that comes from burning various fuel gases. It’s designed to fit right into your existing Purox W-300 handle, so you don't have to fight with it to get it seated. A good seal means no leaks, and no leaks means you stay safe and your fuel bill stays reasonable. It’s a small part that makes a massive difference in how your torch feels and performs.

Don't let a bad mixer ruin your weld or your day. Symptoms like a flame that won't settle, constant popping, or a torch that runs too hot can often be traced back to the mixing chamber. Swapping it out is a standard maintenance procedure that can extend the life of your entire torch setup. With the ESAB 21K78, you are getting a component that matches the original specs of your gear, ensuring that when you light up, you get the heat you expect.

Whether you are brazing pipe, heating up a seized bolt, or doing general fabrication, consistency is key. This mixer delivers that consistency. It’s an affordable fix that restores your torch to factory performance. Keep one in your toolbox so you aren't left scrambling when your torch starts acting up in the middle of a job. Trust ESAB quality to keep your flame steady and your work clean.