Getting the Heat Right for Wide-Format Low-E Glass
If you’re working with Low-E glass sheets wider than 3 meters, you know the struggle. You need the heat to be perfectly even across the whole surface. If one spot is colder than the rest, you get bowing or coating defects. It’s a nightmare. And let’s be honest: standard, off-the-shelf lamps just can’t handle this. That’s why we build custom, continuous infrared units. No gaps. No cold spots. Just a smooth, steady heat. The struggle with 3m+ widths You can’t just “stretch” a quartz tube to make it longer. If you do, the filament will sag or just burn out right in the middle. It’s a physics problem. To fix this, we obsess over the balance between wattage and voltage. We set up a high-voltage configuration so the current pushes through the entire length of the filament without dropping off. The result? The heat is just as strong at the edges as it is in the center. The guts of the lamp We use heavy-wall quartz glass because these long spans take a lot of mechanical stress. They have to be tough. Inside, the filaments are wound with precision to keep the resistance consistent. We stick to short-wave or medium-wave emission because that’s the best way to get the energy deep into the Low-E coating quickly, without wasting power. We also use reinforced end-caps and industrial connectors. These lamps go through a lot of heating and cooling cycles, and the last thing you want is a connection snapping during a shift. Fitting them into your line These are designed to be drop-in replacements for your current preheating tunnels. Here’s the best part: by using one ultra-long element instead of a bunch of smaller ones, you get rid of all those electrical connections and the gaps between lamps. No gaps means no “cold strips” on your glass. But a quick heads-up. Driving a 3-meter lamp puts out a massive amount of heat. Make sure your cooling fans and exhaust systems are up to the task. If they aren’t, you’ll end up overheating your conveyor rollers or warping your frame. It’s a lot of power—you just have to make sure your ventilation can keep up.