Open Coil and Strip Heaters

Open coil & sinusoidal strip heating elements are the most efficient and versatile while also the most economically feasible solution for heating, these elements have fast heat-up times because direct heat transfer to object by radiation without insulation medium. They have open circuits consisting of coiled resistance strip or wire (usually Ni-Chrome alloys or ferritic alloys FeCrAl) fixed to a supporting insulation body like a ceramic tube, ceramic fiberboard, insulation refectories etc that heat medium directly.

When an electrical current is passed to the wire, it produces heat. The wire is connected to the control panel that regulates the amount of heat generated by the electric heater and fills the tunnel of the air handling unit. They serve as an indirect solution to minimise watt density requirements and prevent heat-sensitive materials from breaking down. The heater can be formed into a compact, coiled nozzle heater supplying a full 360° of heat with optional distributed wattage.

Application

• In Direct furnace heating
• In Muffle furnaces
• Air heating
• Heating in a vacuum environment

Advantages