Introduction
When you’re annealing glass continuously, the heater is way more than just a heat source. It’s the heartbeat of the whole thermal profile. If you’re tired of that nagging batch-to-batch inconsistency, what you really need is heat you can count on—heat that lands the same way, every single time. That’s exactly how we built our infrared heaters for continuous glass annealing. They’re made to hold the temperature steady, without drifting, so every sheet of glass that comes out has the same stress level. No surprises. Just repeatable results.
Power, Voltage, and Geometry: The Why Behind the Choices
We built these heaters for the real world—industrial duty. That means running on high voltage, often 400V, and packing a lot of wattage into a compact tube. But it’s not about brute strength. It’s about control. High voltage keeps the current lower for the same power, which means you can use smaller wiring, avoid voltage drop over long runs, and keep the control tight right where you need it. And the tube? We keep it short—around 300mm—so it fits standard annealing zones and focuses the infrared energy right where it matters: on the glass. It’s a density play. You get intense, directional heat in a small footprint. But that also means your cooling and airflow have to be up to the task. If the enclosure can’t shed heat properly, the control system starts chasing its tail, and the lamp runs hotter than it should.
Inside the Tube: Where the Magic Happens
Inside, the halogen cycle keeps the filament stable over time, which is what keeps the output consistent. The quartz envelope can handle rapid heating and cooling, and it stays clear so infrared energy gets through efficiently. And that reflective coating? It’s not just for looks. It catches radiation that would otherwise go to waste and throws it forward onto the target, helping the heat spread evenly across the glass. Then there’s the connector. On the shop floor, details like this matter. We chose R7s—a tough, two-pin end cap that gives you solid contact, quick swaps, and reliable alignment. It drops right into many annealing fixtures, so you can upgrade the heater without redesigning the whole machine.
What It Feels Like on the Line
Continuous annealing moves fast, and the temperature window is tight. If the heater output wavers, you get uneven viscosity, inconsistent stress relief, and quality that starts to drift. Our infrared heaters keep output steady over long runs, so your annealing stays consistent shift after shift. For the people running the line, that means fewer scrap batches, less rework, and simpler validation—especially when you switch glass thickness. The lamp is built to handle the heat, sure, but it needs the right electrical and thermal setup to shine. Match it to the right infrastructure, wire it properly, and your line will run with the same annealing profile every time.