Industrial Heating Accessories
In a closed loop industrial heating process, the main four elements are:
- The heater (band heater, infrared heater, cartridge heater, circulation heater, immersion heater, strip heater, tubular heater, cast heater, duct heater, HVAC heater, quartz heater, open coil heater, ceramic heater, infrared heater,
- The temperature sensor (contact- or non contact temperature measuring methods like infrared sensor, thermocouple, RTD, thermostat)
- The temperature controller (on / off control, PID controller)
- The electric load switch (electromechanical relay, Mercury relay, solid state relay or SSR, silicone controlled rectifier or SCR)
These four main elements need to be connected with each other. The thermocouple and the heaters have standard lead wires of 12 inches (although they can easily be made longer), but the control panel may still be a couple of feet away from them. To connect them, you may need thermocouple wire or thermocouple extension wire and wires for the electrical power. If the wires are potentially exposed to temperature above 450 degree Fahrenheit, high temperature wire will be needed.
Thermal calculations include the calculation of heat loss during startup and processing. This heat losses can be significant and a major cost factor which can be reduced through insulation. For example: each square foot of uninsulated oxidized steel at 400deg F will radiate 350W (or 1200 BTU) into the atmosphere. Insulation is rated by the insulative or “R” value. The “R” value is simply the reciprocal value of the conductivity “k” (k = btu/in/hr/sqft/degF) The higher the “R” value, the better the insulation quality. To reduce heat loss, different types of industrial thermal insulation are available.
Please see the other sections of the Delta T website for more information or contact us with any additional questions.