Contact Platform Support
Help CenterDouble-Threaded Type SiC Heating Element
Related Products
The double threaded type silicon carbide rod, known as Double Spiral Shape SiC Heating Elements (SD type), is also referred to as SCR type or LS type.
This double spiral shape silicon carbide heating element is crafted from highly dense silicon carbide, featuring a return spiral groove that enables connection at a single end. Its resistance and allowable surface load significantly exceed those of other silicon carbide elements, resulting in higher working voltages and lower current consumption. This design substantially reduces the cost of control equipment and wiring. With a same-end terminal structure, it offers energy efficiency, convenience, and ease of installation.
Similar to the single-threaded type, the double spiral silicon carbide heating element is a tubular component with a spiral groove heating section. Its primary advantage is that both electrical connections are located at one end. Made from specialized materials, it achieves a hot zone density of 2.8 g/cm³, operates effectively at temperatures up to 1650°C, and ensures an exceptionally long service life.
| Parameter | Details |
| Material | Silicon Carbide (SiC) |
| Power Supply | Electric |
| Production Process | Crafted from premium silicon carbide blanks, enhanced through high-temperature siliconization recrystallization |
| Silicon Carbide Content | Above 99% |
| Diameter | 12-90 mm |
| Operating Temperature | Up to 1650°C |
| Voltage | 110-480V |
| Packaging | Inner cardboard box with foam padding, outer export wooden crate |
| Application | Industrial heaters/furnace heaters |
| After-sales Service | Overseas service centers available |
| Brand | Chuangwei |
When ordering a double spiral SiC heating element, please provide the following details:
OD (mm): Outer diameter
HZ (mm): Hot zone length
CZ (mm): Cold zone length
OL (mm): Total length
If you have specific resistance requirements, please let us know.
SD type: OD = 32 mm, HZ = 300 mm, CZ = 250 mm, OL = 550 mm, resistance = 4.46 Ω.
Designated as: 32/300/550/4.46 Ω
Double threaded type silicon carbide heating element reference data
| Diameter (mm) | Resistance and Power (at 1000°C) | |||
| Hot End | Cold End | |||
| Ω/mm | W/mm | Ω/mm | W/mm | |
| 18 | 0.02158 | 8.48 | 0.0043 | 1.7 |
| 20 | 0.02302 | 9.42 | 0.00384 | 1.6 |
| 25 | 0.01969 | 11.78 | 0.00328 | 1.75 |
| 30 | 0.01523 | 14.13 | 0.0019 | 1.75 |
| 35 | 0.01224 | 16.49 | 0.0015 | 2 |
| 40 | 0.00905 | 18.84 | 0.001 | 2.1 |
| 45 | 0.0096 | 20.91 | 0.00079 | 2.1 |
| 50 | 0.02953 | 23.55 | 0.00075 | 2.2 |
| 54 | 0.00636 | 25.43 | 0.00073 | 2.3 |
Note: This table provides a partial overview of available specifications. For additional sizes or custom requirements, please get in touch with us, and we will tailor solutions to meet your needs.
Installation and OperationInstallation TypesThe SD type SiC heating element supports both vertical and horizontal installation.
For horizontal installation, the hot end requires no additional support, and the terminal groove must not contact the furnace wall or kiln insulation layer.
The most straightforward approach is to position the groove horizontally, with wiring holes sized 10% larger than the element diameter.
Installation should be performed with great care to ensure the SD-type SiC heating element remains free of tension.
Sufficient flexibility must be allowed to accommodate independent expansion and contraction of both the furnace and the heating element.
Installation PositionThe heating section of the SD type SiC heater element should be centered within the furnace chamber to prevent any part from extending into the furnace wall.
In some cases, a 1/2 inch (13 mm) deep conical or truncated cone groove is incorporated into the inner wall where the SD-type silicon carbide heating element passes through. This design facilitates normal radiation from the hot zone and helps maintain uniform kiln temperatures.
ApplicationsDouble-threaded heating elements are widely utilized across a range of furnaces, from small laboratory units to large-scale industrial heating processes, accommodating various atmospheres and temperature ranges.
In dental furnaces, most zirconia materials require sintering at 1450-1550°C for two hours or longer. As a common electric heating element in zirconia sintering furnaces, the SD-type silicon carbide rod is an ideal choice for this application. They enable heating of zirconia in open, lidless crucibles, eliminating the need for a dual atmosphere within the crucible and enhancing sintering precision. This approach simplifies the process by avoiding the complexity of secondary heating environments. Additionally, SD-type silicon carbide rods can cool rapidly without damaging components.
Thanks to their high temperature resistance, thermal stability, and excellent electrical insulation, threaded-type silicon carbide rods are extensively used in electronic semiconductors, optoelectronic equipment, and precision machinery industries.
Their demand has notably increased in the automotive sector, particularly as a thermal management material in new energy battery cooling systems and as a packaging material for electronic components.
Advantages of SD Type Silicon Carbide Heating ElementThe double spiral silicon carbide heating element offers current-based heating, rapid temperature rise, and a uniform temperature field. In an oxidizing atmosphere, it can achieve room temperature up to 1450°C, with continuous use extending up to 2000 hours.
It also features excellent chemical stability, high temperature resistance, anti-oxidation, and corrosion resistance.
The cold end conductive section of the double spiral silicon carbide rod is uniformly coated with an aluminum layer, significantly enhancing its conductive performance.
Connection MethodThe double spiral silicon carbide heating element is designed for single-side wiring in electric furnaces. The diameter and length of the cold and hot ends of the silicon carbide rod can be selected based on the furnace structure, temperature, and power requirements.
The single-end connection of the SD type silicon carbide heating element makes it exceptionally suitable for applications where standard elements are impractical, such as hard-to-access locations or any scenario requiring a single-end connection.
Send Inquiry to This Supplier
You May Also Like
-
W Type SiC Heating ElementNegotiableMOQ: 2 Pieces
-
Single-Threaded Type SiC Heating ElementNegotiableMOQ: 2 Pieces
-
L Shape Molybdenum Disilicide RodNegotiableMOQ: 2 Pieces
-
U Shape Molybdenum Disilicide RodNegotiableMOQ: 2 Pieces
-
W Shape Molybdenum Disilicide RodNegotiableMOQ: 2 Pieces
-
I Shape Molybdenum Disilicide RodNegotiableMOQ: 2 Pieces
-
Special Shape Molybdenum Disilicide RodNegotiableMOQ: 2 Pieces
-
MoSi2 Heating Element AccessoriesNegotiableMOQ: 2 Pieces
-
Double-Threaded Type SiC Heating ElementNegotiableMOQ: 2 Pieces
-
2014 Newest Silicon Carbide (sic) Heater HG 140US$ 1 - 50MOQ: 100 Units
