5 Things You Should Know About High Temperature Filter

In many industries, high temperatures are essential conditions when working, which leads to a significant challenge for filters in air filtration systems. Normal filters quickly age and lose structural integrity in high-temperature environments, potentially leading to serious dangers like fires. This is where high temperature filters play a unique role.

High-temperature air filters are designed specifically for extreme high-temperature environments. Common high-temperature filters on the market can operate stably in continuous high temperatures up to 250°C, while better models can withstand instantaneous extreme temperatures of up to 350°C. This ensures the continuous and reliable operation of workshops in high-temperature working conditions.

CONTENT

>>> Why High-temperature Resistance?

>>> Advantages of High-Temperature Filters

>>> Factors Affecting High-Temp Filters' Performance

>>> Installation and Maintenance

>>> Applications of High-Temperature Filters

>>> Conclusion

Why High-temperature Resistance?

Why can high-temperature filters withstand such high temperatures? This is mainly due to the special materials they use. High-temperature filters are made from various heat-resistant materials:

--- Filter media is usually made of fiberglass or special organic synthetic fibers.

--- Frameworks can be made of stainless steel, aluminum alloy, or galvanized iron.

--- Sealants are typically high-temperature silicone or ceramic.

--- Seperators are usually made of aluminum foil, stainless steel foil, or ceramic fiber.

--- These materials work together to enhance the stability of the filter in high-temperature environments.

Advantages of High-Temperature Filters

 --- Stable Performance: The filter can keep a great performance and stable structure in high-temperature environments, ensuring the normal operation of high-temperature workshops.

--- Precise Filtration: The filters can capture tiny particles in the air effectively, ensuring cleanliness of the workshop.

 --- Long Lifespan: The filters are seperated by the aluminum foil (or other materials), can reduce the resistance while maximizing filter material utilization.

--- Customization: They can be customized according to specific needs to precisely filter out the dust particles.

Factors Affecting High-Temp Filters' Performance

--- Overtemperature: Different filters have different temperature tolerances. If the actual temperature exceeds the rated resistance (e.g., using a 250°C rated filter for 300°C airflow), it can lead to fiber softening, increased pore size, and failure of the interception and diffusion effects, resulting in particle leakage.

--- Overcapacity : If the actual airflow exceeds the rated capacity (e.g., rated for 1000 m³/h but running at 1500 m³/h), the high airflow speed can weaken the diffusion effect (small particles cannot fully undergo Brownian motion) and may cause material wrinkling and seal failure.

--- Corrosive Gases: If high-temperature airflow contains acidic or alkaline vapors (like those from refinery exhaust), not using a 316L stainless steel frame with PTFE-coated filter materials can lead to material corrosion, fiber breakage, and total filter failure.

Installation and Maintenance

--- Before Installation: Thoroughly clean the installation environment, then immediately prepare the high-temperature filter for installation to avoid contamination. Check for any damage to the filters.

--- During Installation: Pay attention to the installation direction, following the airflow direction marked on the filter. Ensure the filter fits tightly with the external frame.

--- After Installation: After installation, conduct a trial run and monitor all indicators in the workshop. Confirm everything is correct before normal use. Regularly check and replace the filter to avoid losses from delayed maintenance.

Applications of High-Temperature Air Filters

--- Pharmaceutical Industry: In pharmaceutical workshops and sterile laboratories, high-temperature filters ensure air cleanliness meets production standards, safeguarding product quality.

--- Food Industry: During high-temperature sterilization processes, these filters help maintain the taste, nutritional value, and safety of food.

--- Electronics Industry: In LED, circuit board, and other production workshops, high-temperature environments can cause regular filters to fail. High-temperature filters ensure air quality and stable production.

--- Chemical Processing and Metallurgy: Chemical reactors, smelting operations, and metal processing generate dust and high-temperature fumes. High-temperature filters effectively capture these substances, ensuring production safety.

--- Industrial Furnaces and Incinerators: These environments produce extremely hot waste gases with particulates that must be captured before being released into the atmosphere. High-temperature filters installed in these systems protect downstream equipment from particle damage and ensure compliance with regulations.

Conclusion

Choosing the right high-temperature filter is complex. You need to consider its heat resistance, structural stability, and filtration efficiency to balance filtration efficiency with acceptable pressure drop (energy consumption), minimizing overall operating costs. With 20 years of experience in the air filtration industry, Amorair have extensive knowledge about selecting, installing, and maintaining high-temperature filters. If you have any questions about filters or cleanroom equipment, feel free to contact us.