Mica Band Heaters

Heated Area x Maximum Watt Density:
1.) Calculate the heated area of the Mica Band heater. Subtract the non-heat area from the total area in contact with the cylinder (3.14 x I.D. x width). Subtract the non-heat area caused by holes, slots or oversized gaps.
2.) Determine the maximum watt density of the Mica Band heater by referring to the Maximum Allowable Watt Density graph. Apply necessary correction components to your band heater:

• Heaters 2 ¼” (57 mm) to 5” wide (127 mm): Multiply watt density by 0.8.
• High expansion cylinders (aluminum or brass): Reduce the watt density by 3 W/in² (0.46 W/cm²).
• Heaters 2 ¼’ – 5” wide installed on a high expansion cylinder: Reduce watt density by 3 W/in² (0.46 W/cm²) only.
• For regular cylinder surfaces other than smooth, machined finish: Reduce watt density by 3 W/in² (0.46 Wcm²).
• Heaters that will be insulated or enclosed: Contact the manufacturer for specific watt densities.

As with any installation utilizing electrical connectivity – use utmost precaution when handling product components to prevent electric shock and subsequent injuries.

Read complete instructions before beginning installation:

1.) Install Mica Band heater onto a clean Surface.
2.) Install clamp straps, and tighten until the screw can be tightened no further. For heaters with multiple straps, alternate tightening each strap – until no additional tightening can occur.
3.) Insure the heater is seated correctly on the barrel – tap around the circumference of the heater with a rubber mallet. This measure delivers a final conforming of the heater to the cylinder. Installers can make additional 1-2 turns on the clamp screw. Each screw should have an optimum torque value as listed in the Clamp Strap Torque Specifications chart.

4.) When installing terminal lugs, torque the top nut to 12 in-lbs, and hold the bottom nut with a wrench to aid tightening the top nut.
5.) After the machine has run an initial heat up, it’s recommended to retighten the clamping bands.

Note: Re-tightening must be done when heaters are cold. If the heater becomes loose from normal operation and cycle, the strap can be re-tightened. Although frequent tightening is not advised, it is recommended to check bands every three to four months for tightness.