On the blow molding line, heat only does its job when it’s controlled. When the cooling fan starts to slip, the heating tunnel temperature wanders, preforms get overheated, and your cycle stability falls apart. You don’t need a line overhaul. You need a fan that drops in, runs as designed, and keeps the machine in spec. What matters technically We build these cooling fans as direct replacements for blow molding equipment, with 1:1 parameter matching to OEM standards across Sidel, Krones, SIPA, Husky, SACMI, and Nissei ASB machines. We spec the correct voltage (230V/400V), rated current, and airflow to follow the original blower curve, so air delivery and static pressure keep the heating zone inside the required tolerance. Infrared heating performance lives and dies on stable airflow. Without it, quartz tubes and halogen emitters develop hot spots, and preform wall thickness control drifts. The fan housing, mounting dimensions, and connector interface are designed to drop in without modification, keeping the factory airflow path intact and cutting installation time. Why it works on the line In stretch blow molding, consistent cooling keeps the heating tunnel steady, so preform heating repeatability improves and you run fewer scrap bottles. With airflow matched, infrared energy spreads more evenly across the emitter zone, helping you hit setpoint faster and hold it longer. That means fewer temperature-related alarms, more consistent bottle weight, and less unplanned downtime. Energy use drops because the fan draws only the current needed for the duty cycle, not an oversized load, and longer service life means fewer maintenance interventions during high-volume runs. A few practical notes These fans are built for the heat and vibration of the blow molder, but they still need proper air inlet clearance and clean ducting. Blocked ducts or a clogged inlet filter cut airflow and make the fan work harder. For best results, verify the machine model and original fan part number, then confirm voltage and mounting orientation before installation. If your plant runs high ambient temperatures, spec the high-temperature bearing option to stretch service intervals.