Globar® SG and SR

Globar® SG and SR silicon carbide heating elements offer high-performance solutions for challenging high-temperature applications. Produced through a unique reaction-sintering process, these elements feature exceptional oxidation resistance, durability, and consistent heating performance across a temperature range from 600°C (1,110°F) to 1,600°C (2,910°F).

Globar® SG elements

Globar® SG elements include a central hot zone with two low-resistivity cold ends. This one-piece construction, with a helical cut in the hot zone, enables high resistance in the central area for efficient heat dissipation. Standard sizes range from 12 mm (0.47 in) to 54 mm (2.13 in) in diameter, with custom sizes up to 75 mm (2.95 in) available upon request. The cold ends stay relatively cool and are coated with aluminum for low-resistance connections, making installation straightforward.

Globar® SR elements

Globar® SR elements feature a two-start helical cut with the terminal assembly located at one end, allowing current to flow through one spiral and return via the second. These elements are ideal for applications requiring single-end connections and come in standard diameters from 12 mm to 54 mm, with larger sizes available on request. Equipped with short aluminum braids (or tags for smaller sizes), Globar® SR elements can be connected using Kanthal type Q high-purity, fully annealed aluminum braids for added flexibility.

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Applications

Globar® SG and SR elements are suited for a range of demanding industrial applications, including: 

  • Glass industry: Reliable heating for glass feeders and high-temperature furnaces. 
  • Ceramics: Effective for alumina ceramics, sintering, and component production. 
  • Electronics: High performance for electronics production and ferrite manufacturing. 
  • Metal Processing: Suitable for continuous annealing and galvanizing lines. 

Characteristics

Features

Material and structure: 

Manufactured using a unique reaction-sintering process, Globar® SG and SR elements are engineered for exceptional toughness and oxidation resistance. This process results in controlled resistance and consistent heating, allowing these elements to perform in equipment where conventional elements may fail, extending their lifespan and enabling the use of a more cost-effective power supply. 

Flexible installation: 

Globar® SG and SR elements are designed for versatile installation, capable of being mounted vertically or horizontally without additional support, as they retain rigidity even at high temperatures. Available in both round rod and tubular forms, they are adaptable to a wide variety of furnace designs. 

Enhanced performance: 

Supporting significantly higher electrical loads than standard Globar® elements, SG and SR elements maintain superior performance in both continuous and intermittent operations. For example, in clean air at 1,400°C (2,550°F), these elements exhibit only a 3% resistance increase per 1,000 hours, indicating very low degradation over time. 

Wide temperature range: 

Globar® SG and SR elements operate reliably between 600°C (1,110°F) and 1,600°C (2,910°F), with performance optimized according to the surrounding atmosphere. These elements maintain durability across various environmental conditions, including clean air, controlled atmospheres, and gases such as hydrogen and nitrogen, although operational limits vary by gas type. 

Cost and maintenance efficiency: 

With easy installation and stable operation, Globar® SG and SR elements lower furnace construction and maintenance expenses. Their robust design allows for convenient replacement even at high temperatures, reducing downtime significantly. 

Versatile applications: 

Ideal for a wide range of industrial furnaces, Globar® SG and SR elements are well-suited for applications in the glass, ceramics, electronics, and metal processing industries. Their durability and adaptability make them a preferred choice for both research settings and large-scale industrial use. 

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