Getting Your Adelco Tunnel Ovens to Actually Hold Heat
If you’ve ever run a long-distance tunnel oven—especially an Adelco—you know the headache. You’re trying to keep the temperature perfectly flat across a massive stretch of machinery, but it just doesn’t happen. Standard infrared lamps usually lose too much heat or leave cold spots, and suddenly your consistency is out the window. We deal with this using gold-coated twin tube heaters. Here is why they actually work. The trick with the Twin Tube Think of it as doubling your firepower without needing a bigger box. We put two filaments into concentric quartz tubes. This gives you way more radiating surface area in the same amount of space. The best part? You can push significantly more wattage into your drying zone without having to rip apart your oven’s chassis or redesign the whole frame. It just fits. Why bother with the gold? Clear quartz is fine, but it lets shortwave radiation fly right through. Adding a gold coating changes the game. It reflects that heat back toward your product and shifts the energy into medium-wave IR. This is a lifesaver if your product is a bit finicky and can’t handle aggressive shortwave heat, or if you need the heat to soak deeper into the material. Plus, it stops your oven walls from soaking up all the energy. The heat goes where it belongs: on the workpiece. Real-world talk: Installation and pitfalls These are designed as direct replacements for Adelco drying lines. We also build them to take a beating from the voltage swings you get on industrial grids, so they don’t just burn out the moment the power flickers. But, a word of caution. Keep an eye on your cooling. Because that gold coating pushes so much heat toward the target, the ends of the lamps can get seriously hot. If your ventilation isn’t up to the task, you might actually melt your connectors. And double-check your wiring. Make sure it’s rated for the full wattage, otherwise, you’ll deal with voltage drops across those long tunnel runs, and you’re right back to square one with uneven heat.