On the blow molding line, nothing eats yield faster than inconsistent preform temperature. Run them too cold, and the bottle splits at the shoulder. Run them too hot, and you’re dealing with crystallization and haze. The heating tunnel has to deliver repeatable energy, shot after shot, no excuses. What matters, technically We build heat-resistant PETC preform IR tubes for the heating tunnel, using short-wave halogen emitters in quartz envelopes. The geometry is tuned for even axial heating, and the watt density is matched to PET’s absorption curve so the surface heats fast without cooking the core. Specs are production-grade: 1200–3000 W, 240 V, standard R7s connectors, and lengths that drop into common lamp holders. Each tube is calibrated for stable output, so the temperature profile across the preform stays consistent. Why it works on these machines With these tubes, you get tighter thermal control on Sidel, Krones, SIPA, Husky, SACMI, and Nissei ASB blow molders. That means faster cycle recovery, fewer rejects from off-center stretch, and less scrap from neck crystallization. Energy use comes down because the emitter hits setpoint quickly and holds it with minimal swing. Replacement intervals stretch, too — the tube runs cooler at the ends and takes repeated thermal cycling without complaining. Here is what you need to know Installation is straightforward, but the lamp has to sit square in the reflector and seat fully in the R7s socket. Any gap throws off the focal line and skews heating. These tubes are optimized for PET. If you run other polymers, retune the power and dwell, and keep the tunnel clean — dust on the quartz changes output fast. For the best results, match the OEM’s wattage and length, then log temperature and lamp hours so you swap before output starts drifting.