Mica Band Heaters - Watage Density Information

Maximum allowable watt densities for heaters 20" wide or less

Points to consider while selecting watt density

• Select narrower heaters where possible, as their heat transfer is superior to wide heaters. 1” to 2.5” wide heaters are ideal
• The watt density should be selected in accordance with the operating temperature. A table that shows the maximum allowable watt density is provided as a guideline
• To avoid short cycling and inefficient operation, select a wattage as close to the needed capacity as possible
• The wattage should be in accordance with the voltage and current rating of the controls
• The safe heating pattern of the material heated, thermal conductivity and coefficient of expansion of the cylinder are other factors that should be taken into consideration while deciding wattage.

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