Thermocouple Protection Sheath

Product Overview                                                                                        
This series of thermocouple protection sheaths are manufactured from high-purity silicon carbide (SiC) ceramic material. Based on different forming and sintering processes, they are classified into several sub-categories, including Reaction-Bonded (RB-SiC), Recrystallized (R-SiC), Chemically Doped Recrystallized, and Pressureless Sintered (SSiC). They are designed to provide reliable mechanical and chemical protection for temperature measurement in extreme industrial environments.

 Core Performance Parameters

Typical Application Scenarios

• High-Temperature Furnaces/Kilns: Temperature measurement inside pyrolysis furnaces, gasifiers, blast furnaces, sintering furnaces, etc.

• Harsh Processes: Exhaust gas combustion chambers, chemical pipelines, Flue Gas Desulfurization/Selective Catalytic Reduction (FGD/SCR) systems.

• Molten Metal: Suitable for continuous temperature measurement of molten metals such as tin, lead, and zinc; for aluminum melt measurement, it is recommended to use a dedicated plasma coating to extend service life.

Immersion Heater Protection Sheath for Aluminum Casting

Product Overview
This product is a straight-plug type protection sheath specifically designed for immersion heaters in aluminum and aluminum alloy melting and holding furnaces. Its core function is to efficiently conduct heat while providing long-term, reliable isolation of the internal heating element from the molten aluminum.

Technical Features

• Thermal Performance: Utilizes high thermal conductivity material and an optimized thin-wall structural design, resulting in low thermal resistance, high heat transfer efficiency, and low energy consumption.

• Chemical Stability: Possesses excellent resistance to erosion and corrosion from molten aluminum and its alloys, with no element leaching, ensuring metal purity.

• Structural Reliability: Features an extremely low coefficient of thermal expansion and outstanding thermal shock resistance, maintaining structural integrity and preventing cracking or spalling even under frequent thermal cycling.

• Service Life: Under standard operating conditions, the design life is significantly longer than that of traditional materials, reducing replacement frequency and overall maintenance costs.

• Installation & Maintenance: Simple structural design, compatible with standard heater interfaces, making installation and replacement operations straightforward.

Silicon Nitride Heating Element Protection Sheath

Product Overview
This product is manufactured from high-performance reaction-bonded or gas pressure sintered silicon nitride (Si₃N₄) ceramic. It is specifically designed for immersion-type metal melt heaters (e.g., salt bath furnaces, Al/Zn alloy melting furnaces) and serves as a core component ensuring the safe, stable, and long-term operation of the heating element.

Performance Advantages

• Comprehensive Protection: Provides an all-around protective barrier for the heating element with excellent high-temperature resistance, corrosion resistance (especially against molten metal erosion), and high mechanical strength.

• Thermal Management: Good thermal conductivity (~15-25 W/m·K) helps transfer heat evenly and rapidly to the molten bath, reducing localized overheating and improving heating uniformity and energy efficiency.

• Enhanced Reliability: Significantly reduces the risk of heater failure due to short circuits or corrosion caused by sheath damage, increasing the overall Mean Time Between Failures (MTBF) of the heating system.

Dimensions & Customization

• Standard Size Range: Outer Diameter φ50mm - φ430mm; Length ≤ 1350mm.

• Customization Service: Non-standard dimensions, special shapes, interface configurations, and wall thickness optimization can be designed based on customer-provided heater drawings or specific operating condition requirements.