What Are Vented Band Heaters?
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What are Vented Band Heaters?
Vented band heaters are used for high temperature heating and cooling extrusion processes.
Standard Ceramic Band Heaters
Typical ceramic bands contain an extra layer of insulating ceramic paper laid on top of the ceramic knuckles with the intention of focusing heat into the extrusion barrel or process. In fact, Thermal Corporation offers a “Heat Saver” option on ceramic bands which is an additional layer of thicker ceramic paper that increases efficiency and heat retention. Typical ceramic bands have a polished stainless steel outer sheath that reflects heat back into the process and slows radiation losses. In short, most ceramic band heaters are designed to keep heat in and minimize heat losses to the atmosphere.
Vented Band Heaters
Vented bands reverse this equation. The goal is no longer to solely focus heat back into the process, but rather to maintain heating capability while also allowing heat to easily escape when cooling is needed. In pursuit of this goal, vented band heaters have no ceramic paper insulation. There are no added layers to trap heat. Additionally, the outer sheath has holes cut in it to allow maximum air flow for heat removal.
How Do We Achieve This?
Thermal Corporation uses a unique triangle type pattern for the vented outer sheath. This allows for a large percentage of open area across the heater, which speeds cooling, while also maintaining a rigid construction. Additionally, holes can be built into the heater itself allowing air to reach the barrel directly. Note that adding holes to the heater will limit the total wattage available.
Click here to contact Thermal Corporation regarding your specific application requirements.
Written by Kyle Otte
Edited by Shelby Reece
Date Published: 03.18.2019
Last Updated: 09.03.2019