Catalogo_Resistencias

Product catalog summary

Introduction
Silicon carbide (SiC) heating elements are non-metallic components used in industrial heating. They are made from green SiC through forming, high-temperature silicification, and recrystallization. Known for high operating temperatures, resistance to oxidation and corrosion, low deformation, and easy installation, they are available in standard or custom sizes.

Typical Applications
SiC heating elements are used in ceramics, glass, powder metallurgy, magnetic materials, metallurgy, heat treatment, and electric furnace equipment.

Types and Designation
The document describes various SiC heating element geometries: ED (Straight Rod), DB (Dumbbell), U (Double-Leg), W (Three-Phase), SC (Single Spiral), SCR (Double Spiral), and UX (Slotted). Each type requires specific ordering data such as diameter, hot-zone length, cold-end length, overall length, and nominal resistance.

Selection Criteria
Selection depends on furnace geometry, required hot-zone length, available voltage, nominal resistance, and control system. For U and W types, specify center-to-center distance and bridge dimension.

Use and Maintenance
Installation involves checking resistance on the cold end and grouping elements by equivalent values. Elements should rotate freely in the furnace opening, and voltage regulation or electronic control should be used. New furnaces should be dried with used elements or another heat source. Avoid overloading and mixing new and used elements.

Specifications
Specifications for ED type elements include hot zone, cold end, overall length, hot-zone surface area, voltage, power, and resistance, subject to manufacturing tolerances.

Accessories
Accessories include aluminum braids and clamps, selected based on element diameter and expected current. Tightening should be checked after temperature stabilizes.

Specifications:
Detailed specifications for U-Type, SC-Type, UX-Type, and SCR-Type elements include diameter, resistance, and power for hot and cold zones, with a resistance tolerance of ±20%.

Nominal Load by Type:
Elements are categorized by type with specific resistance and power characteristics for hot and cold zones, maintaining a resistance tolerance of ±20%.

Applications and Supply:
Applications and supply formats include prepared rods, warehouse and dispatch, suspended assemblies, spiral elements, and accessories. Heating tests and industrial applications are mentioned.

Request for Quotation:
For fast selection, provide element type, hot zone, cold end, overall length, nominal resistance, quantity, and application. Custom manufacturing options are available, and additional information like photographs or sketches can expedite the process.

Contact Information:
Contact details for Jemar Termometria are provided, including address, phone numbers, and email.

Catalog excerpts

CUSTOM MANUFACTURING TECHNICAL SUPPORT INDUSTRIAL SUPPLY TEMPERATURE SOLUTIONS FOR INDUSTRY SILICON CARBIDE HEATING ELEMENTS (SiC) ED · DB · U · W · SC · SCR · UX Standard configurations and custom manufacturing WIDE RANGE OF CONFIGURATIONS STANDARD AND SPECIAL CONFIGURATIONS RELIABLE INDUSTRIAL THERMOMETRY PRECISION SAFETY PERFORMANCE STANDARD AND SPECIAL CONFIGURATIONS AVAILABLE ON REQUEST Thermometry for a world in motion QUALITY EXPERIENCE INTERNATIONAL

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Non-metallic elements for industrial heating Silicon carbide heating elements are manufactured from green SiC by forming, high-temperature silicification and recrystallisation. Their structure allows them to operate in high-temperature electric furnaces with good resistance to oxidation and corrosion. • High operating temperature and good service stability. • Resistance to oxidation and corrosive environments. • Low deformation and easy installation. • Optimised hot and cold zones to extend service life. • Available in standard sizes or custom-made configurations. • Powder metallurgy and magnetic...

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Ordering data: OD ∙ HZ ∙ CZ ∙ OL ∙ R Example: ED, OD=54 mm, HZ=1575 mm, CZ=419 mm, OL=2413 mm, R=0,90 Ω Order: Silca ED, 54/1575/2413/0,90 Ω Ordering data: D1/D2 ∙ HZ ∙ CZ ∙ OL ∙ R Example: D1/D2=18/28 mm, HZ=300 mm, CZ=350 mm, OL=1000 mm, R=1,70 Ω Order: Silca DB, 18/300/350/1,70 Ω Ordering data: OD ∙ HZ ∙ CZ ∙ OL ∙ A ∙ D ∙ R Example: OD=20 mm, HZ=300 mm, CZ=400 mm, OL=700 mm, A=60 mm, R=2,24 Ω Order: Silca U, 20/300/400/60/2,24 Ω

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Data Required to Define the Element Type Outside diameter Hotzone length Coldend length Overall length Nominal resistance Recommended Process Information • Operating temperature and heating curve. • Available voltage, control system and electrical connection. • Usable furnace dimensions and mounting position. • Process atmosphere and operating frequency. • Quantity, application and special supply conditions. Ordering Criteria Always specify the type, diameter, hotzone length, overall length and nominal resistance. For U and W types, also specify the centretocentre distance. If any dimension is...

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Check the resistance marked on the cold end and group the elements by equivalent values. The deviation within each group must be less than 0,1 Ω. Dry out new furnaces or furnaces that have been out of service. During drying, preferably use previously used elements or another heat source. The element must be able to rotate freely through 360° inside the furnace opening. Avoid forced installation and impacts. Do not overload the elements. If uneven heating occurs, stop the furnace and inspect the assembly. Avoid mixing new and used elements in the same group. Use voltage regulation or electronic...

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Flexible braids and clamps are selected according to the element diameter and expected current. Check the tightening after the operating temperature has stabilised. Pol. Bankunion II - Avda. Agricultura 26 - Nave 6 • 33211 Gijon (Asturias)

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