Small Electric Coil Heater Heating Elements
1. Coil Heater Working Principle
Electric Coil heater, also known as cable heater, convert electricity into heat through the process of Joule heating. Electrical current running through the element encounters resistance, resulting in heating of the element.
2. Coil Heater Structure
The main features of these heaters are 360o heated area, readily confirms to surface, fast response and quick heat transfer, helical coil design for superior performance, good resistance to corrosion and it can easily be coupled with J or K type thermocouple.
The integration of temperature thermocouple for the precise temperature control. It also provides the best combination of physical strength, high emissivity and good thermal conductivity to heat hot runner bushings and nozzles.
3. Coil Heater Standard Sizes
|Cross Section ||Total Length|
|2,2x4.2||300/250mm||J|| 195W x 230V ||1000mm|
|2,2x4.2||330/280mm||J||215W x 230V||1000mm|
|2,2x4.2||385/335mm||J||240W x 230V||1000mm|
|2,2x4.2||450/400mm ||J||300W x 230V||1000mm|
|2,2x4.2||510/460mm||J||350W x 230V ||1000mm|
|2,2x4.2||570/520mm||J||400W x 230V||1000mm|
|2,2x4.2||650/600mm||J||460W x 230V||1000mm|
|2,2x4.2||750/700mm||J||530W x 230V ||1000mm|
|2,2x4.2||850/800mm ||J||610W x 230V ||1000mm|
|2,2x4.2||950/900mm ||J||690W x 230V ||1000mm|
|2,2x4.2||1160/1110mm||J||850W x 230V||1000mm|
|2,2x4.2||1360/1310mm||J||950W x 230V||1000mm|
|2,2x4.2||1600/1550mm||J||1100W x 230V||1000mm|
|2,2x4.2||1850/1800mm||J||1200W x 230V||1000mm|
|2,2x4.2||2300/2250mm||J||1300W x 230V||1000mm|
|2,2x4.2||2550/2500mm ||J||1500W x 230V||1000mm|
4. Coil Heater Parameter
|Sheath Materials||Chrome-nickel Steel|
|Cross Section||Circular, Square or rectangular|
|Insulation Materials||USA High Purity MgO|
|Lead Wires||Teflon, Fiberglass Insulated|
|Voltage Range||Max. 250V, Standard 230V|
|Power Rating||Depending on application|
|Power Tolerance||+-5% to +-2%|
|Unheated Length||25-50mm plus adapter connection|
|Minimum Bending Diameter||6mm|
5. Coil Heater Imported Raw Materials
a. The coil heater resistance is used German Nickel Chrome wire, can be coiled and straight.
b. The insulation material magnesium oxide powder is imported from USA; which ensures the high performance, fast response time and good unformity.
Heating photo for example
Plain leads with high temperature sleeve
High temperature lead wire with a fiberglass jacket exiting from a transition bracket, which sealed with high temperature cement.
Stainless steel braided
The stainless steel braid, provides abrasion resistance and maintains high flexibility.
7. Coil Heater Cross Section
Based on specific requirements and applications, coil heaters are manufactured in different cross sections. Each one is having its own advantages and disadvantages. Basically there are three types of coil heaters. They are
|Coil Heater Cross Section|
|Round Coil Heater Diamater||Φ3.0, Φ4.0,Φ5.0|
|Square Coil Heater Diamater||3.0×3.0, 3.3×3.3, 3.5×3.5, 4.0×4.0, 5.0×5.0|
|Rectangular Coil Heater Diamater||4.0×2.0, 4.2×2.2, 4.5×2.7|
Cross section 4.2*2.2mm
Cross section 3.3*3.3mm
8. Coil Heater Application:
Plastic injection molding machines,
Pulp and paper processing
Blow molding machines
Oil reclamation equipment
Food and candy extruders
Labeling, bag sealing, hot stamping, heat trace, and packaging equipment.