In industrial environments—such as cement plants, metal processing facilities, and power stations—airborne dust (1–100μm) poses risks to equipment performance, worker health, and environmental compliance. As a listed filtration specialist (Stock Code: 837936), LEFILTER’s Air Filter Cartridge solves this challenge. Engineered with pleated high-efficiency media and robust structural design, it captures 99.9% of dust particles while withstanding high airflow and harsh operating conditions—extending equipment lifespan and ensuring compliance with ISO 14644-1 air quality standards.
Outer Pre-Filter Layer: Spun-bonded polyester media (50μm pore) traps large dust particles (e.g., cement clinker, metal shavings), preventing premature clogging of inner layers and extending service life by 35%.
Middle High-Efficiency Layer: Borosilicate glass fiber or synthetic polyester blend—pleated design (150–200 pleats per cartridge) maximizes filtration area (3x vs. non-pleated filters), enabling high airflow (up to 1200 m³/h) with low pressure drop (≤150 Pa).
Inner Support Layer: Polypropylene non-woven fabric bonded to a galvanized steel inner core—resists deformation under negative pressure (≤-60 kPa) and ensures stable airflow.
Housing & End Caps: Galvanized steel housing (corrosion-resistant) or food-grade PP (for food processing facilities). End caps are sealed with high-temperature silicone adhesive—0% air bypass, tested to retain seal integrity at -40℃~120℃.
Anti-Static Option: For explosive dust environments (e.g., grain processing), cartridges are treated with anti-static coating (surface resistance <10⁹ Ω), eliminating electrostatic discharge risks.
Tailor to your system: standard sizes (length 600mm/900mm/1200mm, outer diameter 160mm/200mm), media types (glass fiber for HEPA-level filtration, polyester for high dust-holding capacity), and connection interfaces (flange, thread, or quick-lock).
| Parameter | Standard Details | Custom Options |
|---|
| Filtration Precision | 1μm (99.9% retention), 5μm (99.99% retention) | 0.3μm (HEPA-grade for electronics) |
| Airflow Capacity | 600–800 m³/h (600mm length); 1000–1200 m³/h (1200mm length) | Up to 1500 m³/h (large-diameter models) |
| Operating Pressure | -60 kPa to +20 kPa (static) | -80 kPa (reinforced steel core) |
| Temp Range | -40℃~120℃ (standard); -60℃~150℃ (high-temp media) | -80℃~180℃ (ceramic fiber blend) |
| Media Material | Pleated glass fiber, polyester blend | PTFE-coated media (oil-resistant for machining) |
| Dust-Holding Capacity | 500–800g (600mm length); 1200–1500g (1200mm length) | Up to 2000g (high-capacity media) |
| Resistance (Initial) | ≤100 Pa (at rated airflow) | ≤80 Pa (low-resistance media for HVAC) |
The cartridge’s filtration efficiency relies on its pleated structure and multi-layer media, enabling four key dust-capturing mechanisms:
Inertial Impaction: High-velocity airflow carries large dust particles (≥10μm) toward the pleated media. Due to inertia, particles cannot follow the airflow’s curved path around media fibers and collide with the fiber surface, where they are trapped.
Direct Interception: Medium-sized particles (1–10μm) travel with the airflow and are directly intercepted by media fibers—their size exceeds the fiber gaps, preventing passage.
Brownian Diffusion: Tiny particles (<1μm) move randomly (Brownian motion) due to collisions with air molecules. This random movement increases their chance of contacting media fibers, ensuring even sub-micron dust is captured.
Electrostatic Adsorption (Optional): For anti-static or enhanced models, media is treated with an electrostatic coating. Charged dust particles are attracted to oppositely charged fibers, boosting capture efficiency for fine dust by 20%.
Case: A Hebei cement plant replaced traditional bag filters with LEFILTER 1μm air filter cartridges in its clinker cooler dust collection system.
Result: Dust emission concentration dropped from 50mg/m³ to <5mg/m³ (meeting national environmental standards), filter replacement frequency reduced from 3 months to 6 months, and fan energy consumption decreased by 15% (due to lower pressure drop).
Case: A Shandong thermal power plant installed 5μm polyester cartridges in its boiler air intake system.
Result: Dust in combustion air was reduced by 99.9%, boiler tube fouling decreased by 60%, and thermal efficiency improved by 2%—saving ¥300k/year in fuel costs.
Case: A Henan flour mill used anti-static 5μm cartridges in its dust collection system.
Result: Wheat dust concentration in the workshop dropped from 8mg/m³ to <0.5mg/m³ (meeting food safety standards), electrostatic dust explosion risks eliminated, and product contamination rates reduced to near zero.
Case: A Guangdong semiconductor factory used 0.3μm HEPA-grade cartridges in its cleanroom air circulation system.
Result: Airborne particles ≥0.3μm were controlled to <10 particles/ft³ (meeting ISO Class 5 standards), ensuring no dust interference with chip manufacturing—product yield increased by 8%.
A1: Glass fiber media offers higher precision (down to 0.3μm) and temperature resistance (up to 150℃)—ideal for high-temperature, fine dust scenarios (e.g., power plant boilers, electronics cleanrooms). Polyester media has higher dust-holding capacity and is more cost-effective—suited for general industrial dust (e.g., cement, flour) and low-temperature environments.
A2: Replace when: ① Pressure drop across the cartridge exceeds 300 Pa (monitored via differential pressure gauges); ② Dust emission concentration rises above regulatory limits; ③ Service life reaches 3–12 months (varies by dust load—e.g., 3 months for cement dust, 12 months for cleanroom air).
A3: For low-abrasive dust (e.g., flour), cartridges can be pulse-cleaned (compressed air backflushing) 2–3 times to extend service life. However, abrasive dust (e.g., metal shavings) will damage media fibers during cleaning—replacement is recommended for these scenarios to avoid reduced efficiency.
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