Core Value
The 1300°C U &W Shape SiC Silicon Carbide Heating Elements are high-efficiency, non-metallic ceramic heating elements engineered for high-temperature industrial electric furnaces, ceramic kilns, glass lehrs, and powder metallurgy sintering equipment. Manufactured from high-purity, high-density recrystallized Green Silicon Carbide (a-SiC) grains through high-temperature reaction sintering, these elements spontaneously generate a protective silicon dioxide (SiO2) surface glaze when operating above 900°C. This self-healing glass layer shields the interior SiC ceramic matrix from atmospheric oxidation and chemical corrosion during continuous operation up to 1300°C (2372°F).
Specifically designed in U-Shape (2-shank) and W-Shape (4-shank) geometries, these elements allow all electrical terminal connections to exit from a single side or roof penetration of the furnace wall. This single-ended wiring configuration simplifies terminal lead routing, reduces heat losses through multiple wall penetrations, and maximizes available space inside the heating chamber. Featuring low-resistance cold terminal ends welded to high-purity hot shanks, U and W shape SiC elements deliver high surface loading (watt density), rapid thermal response, and highly uniform radiant heating. BACKED BY 30+ YEARS MANUFACTURING EXPERIENCE and UNDERGOES MULTIPLE RIGOROUS QUALITY CHECKS for guaranteed electrical resistance consistency and zero-defect furnace reliability.
✓ 1300°C Continuous Thermal Stability: Performs reliably up to 1300°C (2372°F) in air and neutral gas atmospheres without structural sagging or thermal fatigue.
✓ Single-Ended Terminal Wiring: U and W shape designs consolidate electrical connections to one furnace wall or roof port, reducing terminal heat losses and wiring complexity.
✓ Self-Healing Anti-Oxidation Layer: Protective SiO2 glass film regenerates automatically at high temperatures, retarding internal oxidation and extending service life.
✓ High Watt Density & Fast Ramp-Up: Accommodates high surface watt densities (up to 15 W/cm²), enabling rapid heating cycles and higher furnace throughput.
✓ Low-Resistance Cold Terminals: Thick cold-end joints keep terminal connection clamps at safe operating temperatures, preventing terminal burnouts.
✓ High Mechanical Rigidity: Recrystallized dense SiC ceramic matrix prevents bowing or sagging during horizontal or vertical installation.
✓ Reliable Quality: 30+ YEARS MANUFACTURING EXPERIENCE guarantees precise ceramic sintering, uniform shank resistance matching, and tight geometric tolerances.
✓ Quality Assured: UNDERGOES MULTIPLE RIGOROUS QUALITY CHECKS including hot/cold resistance calibration, density checks, and dimensional verification.
✓ Global Compliance: CE, RoHS, ISO 9001, and ISO 14001 certified.
Technical Specifications & Performance Data
| Parameter | Standard Value | Customizable Range | Notes |
| Material Base | High-Purity Green Silicon Carbide (a-SiC) | Recrystallized High-Density SiC | > 98.5% SiC chemical purity |
| Max Working Temp | 1300°C (2372°F) Continuous | Peak exposure up to 1400°C | Optimum performance in oxidizing / neutral atmospheres |
| Element Shapes | U-Shape (2 shanks) / W-Shape (4 shanks) | Custom Multi-Leg Bends | Single-ended connection simplifies furnace installation |
| Hot Zone Dia. (d) | Ø 12 mm to Ø 54 mm | Ø 12 mm to Ø 60 mm | Precision ground diameter for uniform power output |
| Cold End Dia. (D) | Ø 12 mm to Ø 54 mm | Equal or Dumbbell Cold Ends | Low-resistance cold legs minimize wall heat loss |
| Shank Distance (A) | 50 mm – 200 mm | Built to furnace roof slot pitch | Precision spacing prevents shank-to-shank electrical arcing |
| Hot Zone Length (CZ) | 150 mm to 1200 mm | Built to kiln chamber dimensions | Concentrates thermal power inside the heating chamber |
| Density | 2.60 g/cm³ – 2.85 g/cm³ | High-density reaction sintered | High structural strength at ambient and hot states |
| Specific Resistance | 0.08 Ω·cm – 0.12 Ω·cm | Calibrated resistance grading | Matched sets supplied for multi-element series/parallel circuits |
| Terminal Connections | Flexible Aluminum Braided Straps | Stainless Steel / Copper Clamps | Ensures low contact resistance at cold terminals |
| Warranty | 1 Year Standard | Extended coverage available | Guaranteed against manufacturing defects |
Industrial Applications & Solutions
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Ceramic & Refractory Kilns: Top and sidewall heating elements for firing porcelain, sanitaryware, technical ceramics, and refractories in shuttle and roller kilns.
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Glass Industry Annealing & Tempering: Top-suspended U and W shape heating units for glass container lehrs, tableware tempering ovens, and glass bending units.
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Powder Metallurgy & Hard Metal Sintering: Heating elements for sintering tungsten carbide, structural steel components, and magnetic ferrite cores.
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Heat Treatment Furnaces: Forging, annealing, and stress-relieving batch and continuous furnaces operating in air or controlled neutral atmospheres.
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Laboratory & R&D Muffle Furnaces: High-efficiency top-mounted elements for benchtop box and tube muffle furnaces requiring single-sided wiring access.
HT-Heater vs Standard Market SiC Elements
| Feature | HT-Heater U/W Shape SiC Elements | Standard Market Elements | Your Advantage |
| Raw Material Purity | High-Purity Green a-SiC Grains | Low-Grade Black SiC / Recycled Blend | Slower resistance aging and superior thermal conductivity |
| Bridge Joint Strength | Seamless Hot-Welded Reinforced Bridge | Weak / Porous Bridge Weld Joint | Eliminates corner hot spots and premature bridge snapping |
| Resistance Matching | Strict $\pm 5\%$ Batch Calibration Matching | Broad Uncalibrated Resistance Variance | Balanced current draw across multi-element 3-phase circuits |
| Cold End Joint | High-Conductivity Low-Resistance Joint | High Resistance Cold Ends | Lower terminal temperatures, reduced heat loss through wall |
| Manufacturing Exp. | 30+ YEARS EXPERIENCE | Unverified Workshops | Engineered bridge geometry and precision ceramic sintering |
| Quality Assurance | MULTIPLE RIGOROUS QUALITY CHECKS | Basic Visual Inspection Only | ZERO DEFECT DELIVERY |
Installation & Operating Guidelines
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Resistance Batch Matching: When installing multiple U or W shape elements in a single control zone, use elements from the same resistance calibration group ($\pm 5\%$) to ensure balanced current distribution and uniform heating.
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Fragility Precaution: SiC elements are hard but brittle ceramics at room temperature. Handle with care during unpacking, measurement, and mounting to prevent mechanical fracture.
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Flexible Aluminum Connection Straps: Always connect cold-end terminals to power busbars using flexible aluminum braided connection straps. Never clamp rigid solid copper wires directly to terminals, as thermal expansion will crack the ceramic cold legs.
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Thermal Expansion Clearance: Provide adequate clearance in furnace roof/wall passage slots (cut holes 5–10 mm larger than the element OD) to allow free expansion and contraction during thermal cycling.
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Managing Resistance Aging: Over hundreds of operating hours, SiC elements experience slow electrical resistance increase (aging). Utilize a multi-tap transformer or SCR power regulator to gradually adjust voltage and maintain constant wattage output over time.
Customer Success Stories
Case 1:
Glass Lehr Manufacturer (Italy)
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Application: Glass container annealing lehr roof heating units operating at 1150°C.
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Challenge: Dual-ended straight rods required wiring access on both sides of the lehr, making insulation sealing and maintenance extremely difficult.
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Solution: HT-Heater U-Shape SiC Heating Elements (Ø 20/300/400 mm) with single-ended roof termination.
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Results: WIRING INSTALLATION TIME CUT BY 50%. “Switching to HT-Heater’s U-shape SiC elements simplified our roof wiring layout dramatically. HT-Heater UNDERGOES MULTIPLE RIGOROUS QUALITY CHECKS, and element lifetime in continuous glass annealing is outstanding.”
Case 2:
echnical Ceramics Sintering Plant (Taiwan)
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Application: Shuttle kiln firing alumina ceramics continuously at 1280°C.
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Challenge: Frequent bridge breakage on standard market W-shape elements during rapid thermal cycling.
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Solution: W-Shape SiC Heating Elements with reinforced ceramic bridge welds.
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Results: ELEMENT BREAKAGE DROPPED TO ZERO. “30+ YEARS MANUFACTURING EXPERIENCE is visible in their bridge welding quality. Thermal fatigue resistance at 1280°C is top-tier.”
Pricing & Procurement Options
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Standard Production: MOQ 5 pieces. BACKED BY 30+ YEARS MANUFACTURING EXPERIENCE ensuring exact resistance matching and dimensional repeatability across production lots. Tiered volume discounts available for 50+ unit orders.
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Lead Times: Standard Catalog Dimensions (U-Shape OD 14–30 mm): In stock, 3-5 days. Custom W-Shape, Special Shank Spacing, or Heavy Diameters (OD 35–54 mm): 7-10 days. Express air freight with protective wooden crating.
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Global Logistics: Encased in individual shock-absorbing foam slots inside reinforced wooden export crates to ensure zero transit breakage.
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Sample Orders: Custom sample elements produced upon CAD drawing and electrical specification approval. Every shipment UNDERGOES MULTIPLE RIGOROUS QUALITY CHECKS prior to dispatch.
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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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