SiC Heating Elements
ED type SiC heating elements for tunnel kilns, roller kilns, glass kilns, vacuum furnaces and smelting furnace heating systems.
The silicon carbide heating element is a kind of non-metal high temperature electric heating element. It is made of selected super quality green silicon carbide as main material.which is made into blank,silicided under high temperature and re-crystallized. Compared with metal electric heating element,this kind of element is characterized by high-applied temperature,anti-oxidization,easy installation and maintenance. Therefore, it is widely used in various high temperature electric furnaces and other electric heating devices, such as in the industries of magnet, ceramice, powder metallurgy, glass metallurgy and machinery,etc.
1. High working temperature: 1400C.
2. Long time last.
3. Varous type available. Rod, U, W, Single Spiral, Double Spiral
1. High working temperature: 1500C (Surface Temperature)
2. Various shapes: Rod, U, W, Single Spiral, Doule Spiral shapes are availible.
3. Large size range: Diameter 14-54mm, Length 200-4500mm.
4. Fast Delivery: Normal quantity can be ready in 10 days.
5. Very competitive prices.
1. SiC Heating rod is heated in the air after the formation of a silicon oxide film compact surface,Into a protective film to protect the antioxidant, play a role in prolonging life. In recent years, our company developed a variety of silicon carbide coating to prevent cracking, for a variety of gas furnace.
2. Continuous use of silicon carbide, hoping to slow increasing resistance to maintain long life.
3. Globar as far as possible in parallel. If the silicon carbide with different resistance and series resistance of silicon carbide rod load, resulting in a rapid increase in a silicon carbide rod resistance, shorter life expectancy.
4. After the silicon carbide rod with the temperature higher lifetime is shorter, so in the furnace temperature super 1400 DEG C, accelerate the oxidation rate, shorten life. Use note try not to let the silicon carbide surface temperature is too high.
For ED type straight SiC element inquiries, the following rod and equal-diameter SiC element data can be used as a practical reference. Final dimensions should be reviewed with drawings or replacement samples.
| Parameter | Technical value or range | How to use it for ED type inquiries |
|---|---|---|
| Diameter / OD | General Lasting SiC rod diameter range: 8-54mm | Send the actual outside diameter from the existing element or furnace drawing. |
| Hot zone length / HZ | Standard rod tables include examples from 100mm to 3000mm | Match the heating chamber width and active heating zone. |
| Cold end length / CZ | Standard rod tables include examples from 100mm to 650mm | Match furnace wall thickness, terminal position and connection space. |
| Overall length / OL | General Lasting SiC rod length up to 4300mm | Use the full element length from end to end for replacement review. |
| Nominal electrical values | Standard technical data includes voltage, power and resistance at 1000℃ in open air | Provide resistance, voltage or power if available; these values help resistance matching. |
| New element operating limit | Maximum recommended operation voltage should not exceed 80% of test value; power should not exceed 65% of test value | Useful when checking power supply settings for new elements. |
| Recommended surface loading | 3-8 W/cm² for furnace design | Lower surface loading is normally preferred for longer service life. |
For a fast quote, include OD, HZ, CZ, OL, resistance, furnace temperature, atmosphere, voltage, power, quantity and application. If the project is a replacement, photos or drawings of the existing ED type element are especially useful.
| Operating item | Technical value | Buyer note |
|---|---|---|
| Maximum element temperature | Up to 1600℃ in clean dry air | Atmosphere may reduce the practical service temperature. |
| Recommended surface loading | 3-8 W/cm² for furnace design | Lower surface loading is preferred when longer service life is required. |
| Resistance measurement | Measure at 1000℃ or above from voltage and current | Room-temperature resistance does not represent high-temperature resistance. |
| End of functional service life | Resistance reaches 3 times the original value | Keep voltage, current and resistance records for later replacement. |
| New element operation limit | Voltage not over 80% of test value; power not over 65% of test value | Use rated test values only for calibration review. |
The following installation and electrical rules are useful for furnace builders and replacement projects.
| Item | Recommendation | Why it matters |
|---|---|---|
| Element center to element center | Minimum 2 times element diameter; 2.5-3 times is recommended | Helps reduce local overheating and short-circuit risk. |
| Element center to furnace wall | At least 1.5 times element diameter | Leaves space for heat radiation and installation tolerance. |
| Element center to heated product | At least 2 times element diameter | Helps avoid direct obstruction and uneven radiation. |
| Preferred circuit connection | Parallel connection is preferred where possible | Small resistance changes tend to balance during use. |
| Series connection | Up to 4 elements when resistance is well matched; limit to 2 above 1400℃ | Reduces overload risk when resistance changes over time. |
| Resistance matching | Series: +/-5%; parallel: +/-10% | Useful when grouping elements for replacement and maintenance. |
| Voltage reserve | Usually 50%-100% above the voltage required by new elements | Allows the power supply to compensate for resistance aging. |
Buyer Resources
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For faster review, include element type, diameter, hot zone length, cold end length, resistance, furnace temperature, quantity and application.
