Product Overview
Ceramic band heaters string ceramic insulating blocks and resistance wire into a flexible band housed in a stainless-steel shell, tightened at both ends by bolts around the barrel. Expansion gaps between blocks prevent cracking from thermal expansion at high temperature, reaching 650°C—well above mica types.
The inner shell is polished; tighter contact with the barrel improves heat transfer. In practice we recommend a layer of thermal grease or graphite foil to cut contact resistance. Terminal boxes are metal or ceramic; leads use high-temperature fiberglass or ceramic sleeves, with ceramic terminals preferred above 400°C long-term.
Band width runs 25–200 mm, ID 40–600 mm, and can be zoned along the barrel with independent control per zone. Injection nozzles, flange zones, and extruder sections need different temperatures, so zoned heating controls melt quality better than one high-power section.
Construction Features
- Ceramic-block structure, up to 650°C, thermal-shock resistant
- Stainless-steel shell, polished inner wall for barrel contact
- ID 40 – 600 mm, width 25 – 200 mm, customizable
- Split (clamp) or seamless types; split eases replacement
- Ceramic or metal terminal box, high-temperature leads
- Zoned layout, independent temperature per zone
Technical Specifications
| Rated Power | 0.3 – 12 kW |
|---|---|
| Rated Voltage | 220V / 380V |
| Max Temperature | 650°C |
| ID Range | Φ40 – Φ600 mm |
| Band Width | 25 – 200 mm |
| Shell Material | 304 stainless steel |
| Insulation | High-frequency ceramic blocks |
| Connection | Ceramic terminals / metal terminal box |
The table lists typical configuration ranges. Special pressure, temperature or media conditions require re-checking; final parameters are confirmed by the approved drawings and technical agreement.
Typical Applications
- Injection molding barrels
- Extruder barrels
- Blow-film and pelletizing machines
- Hot-runner systems
- High-temperature pipe tracing
Information Needed for Selection
- Medium name, concentration, and whether it contains particles
- Total medium volume or circulation flow rate
- Initial and target temperature
- Required heat-up time
- Vessel or pipe size and material
- Supply voltage, phases, and available capacity
- Installation environment and hazardous-area requirements
- Connection standard and mounting orientation
