On the blow molder, uneven preform heating shows up immediately—off-center walls, blown threads, and scrap that chews up run time. When the heater bulb in your SIPA SFR 12 rotary blower can’t keep up, you don’t just lose parts. You lose the heating curve.
What matters under the hood
The SIPA SFR 12 rotary blower heater bulb is a short-wave infrared halogen emitter, built around a high-purity quartz tube and a precisely wound tungsten filament. It’s engineered to match the SIPA SFR 12 machine’s power and mechanical envelope, so it responds fast and keeps the energy focused inside the heating tunnel. The R7s base and standardized dimensions drop straight into the existing socket and reflector geometry—no mods needed. We hold every unit to a repeatable resistance tolerance and run 100% burn-in, so output stays consistent lamp to lamp.
Why this matters on a SIPA SFR 12
With stretch blow molding, the heater bulb is what keeps cycle-to-cycle repeatability honest. When infrared output is stable, preforms hit the same temperature profile every cycle, stretch ratios stay predictable, and you see fewer thin spots and stress marks. The payoff is fewer rejects, less resin waste, and fewer unplanned stops to clear jams. And because the lamp comes up to temperature quickly, you avoid the long warm-up penalty that shows up when you run mismatched or under-spec emitters.
Here’s the thing: this is an OEM-spec replacement, not a universal bulb. Check the exact wattage and voltage rating on your machine’s nameplate before ordering, and take a close look at the reflector—pitting or oxidation scatters energy and throws the heating off. Keep the bulb face clean, too. Oils and dust, even fingerprints, can create hot spots and cut service life. Installed correctly, you can expect consistent performance over 5,000+ hours, with output drift held within tight limits.