High temperature filters are capable of handling extreme temperatures while maintaining air quality. These filters are important for processes that generate high temperatures, such as metal working and chemical processing industries.
High-temperature air filters remove harmful particles, thus ensuring the smooth operation and safety of your equipment.
Air filter manufacturers have been developing filters that hold up well in high temperature environments and optimizing their processes.
High temperature filters are specialized filtration devices. They withstand extreme heat without losing effectiveness. These filters are designed to operate in industrial settings that involve high temperatures.
Their primary function is to remove particles and pollutants from the air. This ensures air quality while equipment operates at elevated temperatures. The durability of these filters makes them essential for specific industrial processes.
Key features of high temperature filters include:
Heat resistance
Durable construction materials
Efficient particle removal
These filters are crafted from materials like fiberglass, ceramic, or metal. The choice of material depends on the specific temperature and industrial requirements. Such construction allows them to endure harsh conditions while maintaining performance. Their robust design ensures longevity and reliability in challenging environments.
High temperature filters are crafted from specialized materials. These materials can withstand extreme heat without degrading. Common materials include fiberglass, PTFE, and metals. Their heat-resistant properties make them ideal for industrial environments.
Here are some common types:
Constructed with glass fiber in stainless steel frames
Efficiency levels at H13-H14: 99.95% 99.995% at 0.3μm (280°C-450℃)
Feature aluminum foil separators (0.035mm) and 4mm glass fiber spacing for optimized airflow
Made from glass fiber
Typical efficiency: F7-F9 (80-95% for 1-5μm particles)
Operating range: 300°C-350°C
Made from chemical fiber
Typical efficiency: G4 (95% for 5μm particles)
Operating range: 240°C-300°C
Several international standards govern the testing of high temperature filters:
The ISO 29463 series specifies test methods for HEPA filters and filter media for the removal of airborne particles, including requirements for high temperature conditions up to 250°C and 1,000 hours of aging tests.
EN 1822 specifies categories of HEPA filters suitable for high temperature environments and their performance at maximum penetrating particle size (MPPS).
IEST-RP-CC007.3 provides test procedures for HEPA and ULPA filters, including accelerated aging tests with temperature cycling from 20-250°C, humidity changes (20-95% relative humidity) and salt spray exposure.
Key performance parameters for high temperature filters include:
Temperature resistance: Filters are classified by their maximum operating temperatures (typically ranging from 80°C to 250°C for standard industrial applications, and up to 800°C for specialized ceramic filters) .
Filtration efficiency: Must maintain ≥99.95% efficiency at 0.3μm particles after high temperature exposure (per ISO 29463) .
Structural integrity: No visible deformation or damage after thermal cycling tests
Leakage rate: For HEPA filters, leakage must not exceed 0.01% of the total airflow when tested according to ISO 14644-3 standards .
High temperature air filters find use across various industries. These filters excel in environments with extreme heat. Their design helps them withstand the high temperatures found in many industrial processes.
Metalworking is a key application area for these filters. The intense heat in metal processing demands robust filtration systems. High temperature filters ensure clean air for workers and machinery.
Glass manufacturing also relies on these filters. The production process generates significant heat and contaminants. Filters help maintain air quality, ensuring a safe and efficient operation.
Other common applications include:
Chemical processing
Power generation
Food production
Automatic Dry Line
Each sector faces unique challenges related to heat and air quality. High temperature air filters are tailored to meet these needs, enhancing safety and performance. They provide essential support for high-heat operations across diverse industries.
The most important reason for the substandard performance of high temperature filters is that the manufacturers do not produce according to the standard and make the best use of second-rate products, and their performance may sometimes fail to meet the required standard. And because the high temperature filter is used for a long time, it will lead to consumers missing the first opportunity to pursue responsibility.
Common causes of substandard performance:
Poor choice of filter media:Selecting materials that cannot withstand actual operating temperatures can lead to rapid deterioration. Filter paper and rubber seals deteriorate above 200°C, becoming brittle and cracking.
The difference between high temperature sealants
Red silicone sealant for 250-300°C
Ceramic-based inorganic sealants for 350-400°C
PTFE sealing tape for 350-400℃
Improper microporous design: Incorrectly sized micropores have a direct impact on filtration efficiency, either allowing particles to pass through or causing an excessive pressure drop.
Manufacturing defects:Problems such as poor sealing, improper welding or material contamination during production can compromise the integrity of the filter.
Investing in high temperature filters offers substantial benefits. They improve air quality, enhance equipment efficiency, and ensure safety in industrial environments. Consider them a pivotal part of your operation's success.
RT Air Filtech, as a professional high temperature air filtration solution provider, has always been committed to providing customers in various industries with a full range of high temperature resistant filters and customised services. Our product line covers filters with different temperature ranges from 250℃ to 450℃, which can be perfectly adapted to the special process requirements of pharmaceutical, electronics, food processing, chemical industry and other fields.
For specific industrial filter specifications or customised advice, please contact our engineering team [info@rtfiltech.com] and we will match you with the optimum high temperature filtration solution.