Flat Elements & Box Heaters

Flat Elements and Box Heaters are primarily used on extruder and blowmoulding heads in the Plastics Industry. Other applications include packaging machines and general heating of containers, pipes and flat metal surfaces.

A distinctive feature of these elements is even heat distribution over a large surface area.

Construction consists of heating wire, insulated with either Mica-plates or ceramic formers. The elements are usually metal encapsulated for mechanical strength.

Mica Insulation

Mica insulation offers thin construction (approx. 4mm), maximum Watts density of 3.5 W/cm² and operation up to 380°C.

For process temperatures in excess of 280°, ceramic insulation is preferred.

Ceramic Insulation

Ceramic elements are thicker in construction (12mm) but offer a Watts density of 5.5 W/cm² and operating temperature up to 600°C.

Generally ceramic elements are more durable than mica elements, thus offsetting the higher price with a longer life expectancy.