Q. Why are Nexthermal Pressed in Brass Coil Heaters better than Cast in Brass Coil heaters?
Cast in Brass heaters have long been the standard for higher temperature nozzle heating applications. Pressed in Brass heaters have the benefits of Cast in Brass Heaters and eliminate profile and durability issues that can result from the casting process. Nexthermal Pressed in Brass heaters utilize a machined brass body with a precisely defined heater path. We press the heater in from the same position at the tip, creating a highly repeatable path from heater to heater. Cast in Brass coil heaters are wound first, positioned in a mold and then have molten brass poured on them. Heater windings have been known to shift in the direction of the pour-which creates variability from heater to heater. Further, in some cases, molten brass temperatures can cause a galvanic reaction at the thermocouple junction-shortening heater life. Nexthermal developed the "Pressed in Brass" heater specifically to address thermocouple life. Our customers have also found that pressed in brass heaters heat up about 8% faster due to reduced air pockets in the machined brass. When OEM programs are in place, "Pressed in Brass" coil heater lead times are often 50-70% shorter than cast in brass heaters.