Matrusree Mica Strip Heaters are an economical and reliable source of heat for industrial equipment where even heats, over broad surface areas are desired.
Three basic strip heaters constructions are illustrated here:
- Mica strip & plate heaters
- Ceramic insulated channel strip heaters
- Finned strip heaters
Mica Strip Heaters : A specific, nichrome or kanthal ribbon wire is wound on specially selected mica strip, providing even heat distribution for maximum heater life. Mica of 1mm thickness is used to insulate the windings, providing excellent dielectric strength and thermal conductivity for efficient heat flow. Plus mica withstands high voltage spikes, resists moisture and is inert to most chemicals. The element is then enclosed in either a stainless steel or a specially treated rust resistant electro plated steel sheath to provide high emissivity and good thermal conductivity for sheath temperatures up to 300°c. (for sheath temperatures up to 550°c a stainless steel sheath is available).
One critical issue with flat heaters is that they tend to detach from the surface they are mounted on due to thermal expansion. To prevent this, an adequate number of mounting screws should be used at the ends as well as the middle of the heater. Incorporated pressure plates could be used to give rigidity to the top sheet, improve heat transfer, and maintain a uniform heat distribution.
- High temperature nickel chromium resistance wire.
- Thin construction and high quality insulation for effective heat transfer
- Excellent dielectric qualities
- Different sheath models to suite temperature range up to 550°c.
- Wide variety of standard and custom options available for termination and mountings.
- Several wattage and voltage combinations are available.
Ceramic insulated channel strip heaters:
Matrusree’s Mica Strip Heaters are constructed of specially selected high quality materials, beginning with the high temperature alloy resistance wire uniformly coiled and spaced over the width of the heated length of the strip heater. This controlled coil process and replacement assures uniform heat distribution over the entire active surface of the heater. Special care is taken to secure the stud-type terminal to the high-temperature alloy resistance contact.
The coiled resistance wire is embedded in a special refractory material that possesses excellent heat transfer characteristics and superior insulation properties. The entire heater assembly is encased in either stainless or chrome steel sheath and is compressed under high pressure. The completed assembly is heated under controlled conditions to bake and semi vitrify the refractory for a rigid, vibration resistant, heavy-duty heating unit.