Core Value
The Electrical Ceramic Bobbin Radiant Tube Heater is engineered for high-power indirect radiation heating in industrial heat treatment furnaces, atmosphere furnaces, hot dip galvanizing lines, and large liquid holding tanks. Constructed using high-purity High-Alumina Steatite Ceramic Spools assembled along a central support rod, this heater supports open-coil or wave-shaped NiCr (80/20) or FeCrAl (Cr25Al5/0Cr27Al7Mo2) alloy resistance wire elements.
By inserting the ceramic bobbin assembly into a metallic or ceramic protective radiant tube, it delivers intense, uniform 360° radiant heat without exposing the heating wire to corrosive furnace atmospheres, process gases, or liquid media. Capable of continuous operation at temperatures up to 1200°C (2192°F), it allows for seamless dry replacement—enabling maintenance technicians to swap out heating core elements without shutting down or cooling the furnace/tank system. BACKED BY 30+ YEARS MANUFACTURING EXPERIENCE and UNDERGOES MULTIPLE RIGOROUS QUALITY CHECKS for long operational lifespan and maximum energy efficiency.
- ✓ Modular Ceramic Spool Structure: Interlocking high-alumina ceramic bobbins provide high dielectric strength, thermal shock resistance, and easy length customization.
- ✓ Indirect Radiant Heat Transfer: Outer protection tube guards internal resistance wire against chemical corrosion, furnace gas attack, and mechanical impact.
- ✓ Continuous High Temperature Performance: Operates up to 1000°C (NiCr) and 1200°C (FeCrAl alloys) for heavy-duty industrial heat treatment.
- ✓ Zero-Downtime Dry Replacement: Heating element core can be replaced from outside the furnace/tank without draining fluid or dropping furnace pressure.
- ✓ Uniform 360° Thermal Radiation: Optimized spiraled or wave-form wire spacing eliminates hot spots and extends alloy element lifespan.
- ✓ Vertical or Horizontal Installation: Modular central rod support prevents ceramic sag and element distortion in long horizontal tubes.
- ✓ Reliable Quality: 30+ YEARS MANUFACTURING EXPERIENCE guarantees exact dimensional tolerances and long-term electrical stability.
- ✓ Quality Assured: UNDERGOES MULTIPLE RIGOROUS QUALITY CHECKS including hot-state insulation resistance and high-voltage breakdown tests.
- ✓ Global Compliance: CE, LVD, RoHS, and ISO 9001 certified.
Technical Specifications & Performance Data
| Parameter | Standard Value | Customizable Range | Notes |
| Power Rating | 1.5 kW – 30 kW per tube | Up to 100 kW custom furnace banks | Custom wattage distribution per zone |
| Voltage Rating | 220V / 380V / 415V / 480V | 110V to 600V AC (3-Phase) | Delta or Star wiring configurations |
| Ceramic Material | C520 / C799 High Alumina Ceramic | Steatite / Cordierite | High mechanical strength & dielectric breakdown insulation |
| Heating Alloy Wire | Ni80Cr20 / Kanthal APM / 0Cr27Al7Mo2 | Custom Resistance Alloys | Selected based on maximum target operating temperature |
| Radiant Tube Material | SS310S / Incoloy 800 / SiC (Silicon Carbide) | APM / Cr25Ni20 Stainless Steel | Matched to chemical exposure & heat density |
| Max Working Temp | 1000°C (NiCr) / 1200°C (FeCrAl) | Up to 1350°C with SiC tubes | Excellent oxidation resistance under continuous thermal cycles |
| Outer Diameter (OD) | Ø30 mm – Ø150 mm | Built to radiant tube ID | Precision fitment ensures rapid radiation heat transfer |
| Element Length | 500 mm – 3000 mm | Extended length up to 6000 mm | Custom modular bobbin stacking |
| Warranty | 1 Year Standard | Extended coverage available | Guaranteed against manufacturing defects |
Industrial Applications & Solutions
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Heat Treatment Furnaces: Primary heating source for carburizing, nitriding, annealing, and quenching continuous belt or batch furnaces.
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Hot Dip Galvanizing & Plating Lines: Indirect heating inside ceramic/metallic radiant tubes for molten zinc baths and chemical dip tanks.
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Industrial Kilns & Glass Machinery: Precise thermal radiation control in glass annealing lehrs and ceramic sintering kilns.
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Large Industrial Boilers & Liquid Tanks: Dry-type immersion bobbin heating for heavy fuel oil preheating, bitumen tanks, and water boilers.
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Aluminum & Non-Ferrous Metallurgy: Holding furnaces and melting pots requiring sealed radiant heat to prevent alloy contamination.
HT-Heater vs Standard Market Heaters
| Feature | HT-Heater Ceramic Bobbin Elements | Standard Market Heating Elements | Your Advantage |
| Maintenance Flexibility | 100% Dry-Replaceable Core | Direct Immersion / Fixed Wire | Swap elements in 15 minutes without cooling or draining equipment |
| Ceramic Spool Quality | High-Alumina Thermal Shock Resistant | Low-Grade Porous Clay Ceramic | Zero cracking under rapid heating/cooling cycles |
| Wire Material Grade | Imported Ni80Cr20 / Kanthal FeCrAl Alloys | Low-Nickel Recycled Wire | High creep resistance, zero premature wire sagging |
| Thermal Limit | Continuous operation up to 1200°C | Warps / burns out above 800°C | Handles extreme watt densities in continuous 24/7 furnaces |
| Manufacturing Exp. | 30+ YEARS EXPERIENCE | Unverified Workshops | Engineered bobbin alignment and pitch calculation |
| Quality Assurance | MULTIPLE RIGOROUS QUALITY CHECKS | Basic Resistance Test Only | ZERO DEFECT DELIVERY |
Installation & Integration Guidelines
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Tube Alignment Check: Ensure the outer metallic or ceramic radiant tube is clean, straight, and free of scale or internal carbon deposits before inserting the ceramic bobbin core.
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Smooth Horizontal/Vertical Insertion: Gently insert the ceramic bobbin heating assembly into the radiant tube. Avoid forcing or dropping the assembly to prevent ceramic spool chipping.
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Terminal Connection: Wire electrical terminals using high-temperature stainless steel or nickel busbars. Ensure all terminal connections are torqued tightly to minimize contact resistance.
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Thermal Expansion Allowance: Verify that adequate axial expansion space exists at the tail end of the tube so the central support rod can expand freely under 1000°C+ heat.
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Initial Commissioning Bake-Out: Perform a gradual ramp-up heating cycle at 200°C for 30 minutes to purge ambient moisture absorbed during transport prior to running full power.
Customer Success Stories
Case 1:
Automotive Heat Treatment Plant (Mexico)
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Application: Continuous gas-carburizing furnace operating at 930°C.
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Challenge: Frequent furnace shutdowns required whenever direct heating elements burned out in corrosive gas atmospheres.
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Solution: Electrical Ceramic Bobbin Heating Elements inside SS310S Radiant Tubes.
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Results: FURNACE DOWNTIME REDUCED BY 90%. “We can now pull out and replace a damaged ceramic bobbin heating core in 20 minutes while keeping the furnace hot at 900°C. HT-Heater UNDERGOES MULTIPLE RIGOROUS QUALITY CHECKS, and element lifespan is fantastic.”
Case 2:
Heavy Asphalt Tank Terminal (UAE)
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Application: 50,000-liter bitumen storage tank preheating system.
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Challenge: Traditional immersion heaters required emptying the entire bitumen tank whenever a heating element failed.
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Solution: Large-diameter Ceramic Bobbin Radiant Tube Heaters.
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Results: MAINTENANCE COST SAVINGS OF $45,000/YEAR. “30+ YEARS MANUFACTURING EXPERIENCE is evident in their spool design. Dry maintenance capability changed our entire plant efficiency.”
Pricing & Procurement Options
- Standard Production: MOQ 5 pieces. BACKED BY 30+ YEARS MANUFACTURING EXPERIENCE ensuring exact spool concentricity and electrical resistance repeatability. Tiered volume discounts available for 20+ units.
- Lead Times: Standard Diameter Bobbin Elements (Ø40mm – Ø100mm): 5-7 days. Custom High-Temperature Alloy & Tube Configurations: 10-14 days. Urgent furnace emergency dispatch available.
- Global Logistics: Export crating with anti-shock foam packing. Shipped via air freight, express courier, or ocean freight for heavy furnace banks.
- Sample Orders: Custom sample bobbins manufactured upon CAD drawing and electrical rating approval. Every unit UNDERGOES MULTIPLE RIGOROUS QUALITY CHECKS prior to dispatch.
Global Certifications & Compliance
- CE Marking
Fully compliant with European safety and environmental standards. - LVD Compliance
Low Voltage Directive tested for continuous thermal load safety. - RoHS Compliant
Constructed using environmentally safe, lead-controlled brass alloys. - ISO 9001
Certified quality control covering CNC machining, coil pressing, and electrical testing.
Quality Documentation: Certificate of Conformity (COC) and insulation resistance test reports included.
Comprehensive After-Sales Support
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- Warranty: 1-Year Comprehensive Warranty covering internal heating element and built-in sensor.
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Technical Support: Application engineers available for wattage distribution calculation, thermocouple calibration, and nozzle fitting assistance.
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Global Response Network: BACKED BY 30+ YEARS MANUFACTURING EXPERIENCE with technical inquiry feedback within 2 hours.
Ready to Optimize Your Injection Molding?
Next Steps:
- 📧 Request Custom Quote – Send your nozzle dimensions, wattage, voltage, and HT-CLW-450 drawing requirements.
- 🔧 Free Design Consultation – Work with our thermal engineers to optimize heat distribution and lead insulation.
- 📦 Order Test Samples – Evaluate thermal performance on your injection molding machine.
- 📞 Contact Hot Runner Experts – Response within 2 hours
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