Why your whole batch depends on steady infrared heat
Picture your glass bottle annealing furnace—running in cycles, batch after batch. Every single run needs the same thermal profile. If your infrared heaters are moody and uneven, the glass ends up stressed, and the scrap pile grows fast. We design our bottle annealing furnace heaters around one clear goal: keep temperature tight and repeatable, across the entire batch.
The power, voltage, and geometry that make it work
Our halogen infrared heaters pack predictable heat into a small footprint. Most run at 400V and draw 2500W, in a 300mm tube. That combo gives you serious heat without needing a bulky heater body. And the 400V rating? It drops the current for that wattage, so your conductors stay reasonable and your connections don’t feel maxed out inside an industrial panel. The 300mm length isn’t random, either. It lines up with standard annealing zones, so you can lay out multiple heaters evenly and avoid hot spots and cold spots. Here’s the catch: high wattage in a short tube means high heat density. That’s powerful—but your machine’s cooling and clearance need to be up to the job, or the local heat and radiant load will push things out of balance.
What’s inside: halogen, quartz, and the R7s connection
We use a halogen-filled quartz tube because it handles rapid temperature swings and keeps resistance stable over time. The halogen cycle helps keep the filament clean, so output stays consistent even over long runs. And the R7s connector isn’t an afterthought. It’s a direct, solid termination that survives vibration and constant heating and cooling cycles. It also makes the heater a straight swap—no custom brackets, no wrestling with delicate terminals.
What this means on the annealing line
On the floor, these heaters give you repeatable heating from batch to batch. Less drift in annealing temperature. Fewer rejected bottles. More stable output, even when you’re running at higher volume. Installation stays simple. The R7s interface gets you wired quickly, and the compact 300mm form fits tight furnace zones. The halogen infrared output responds fast, so you can fine-tune zones without overshooting. One practical reality check: high-density heating needs proper thermal management. If your furnace airflow and insulation aren’t up to it, you’ll see premature wear and unstable zone temperatures. Match the heater to the system, and the system will deliver glass that comes out the same—every time.