Polyester filter cartridges are a highly effective solution for air filtration in metalworking environments, which generate diverse contaminants such as dry metallic dust, grinding swarf, welding fumes, and oily mist.

Why Polyester for Metalworking?

Durability and High Abrasion Resistance: Metal dust and shavings can be sharp and abrasive. Spun-bonded polyester media is robust and resistant to cutting and tearing, making it significantly more durable than cellulose or standard paper filters.

Effective Fine Particle Capture: Metalworking processes, especially welding and grinding, produce very fine, sub-micron particles. High-efficiency polyester filters (often enhanced with a PTFE membrane) effectively capture these hazardous fumes and dusts to maintain a safe working environment and comply with occupational safety standards.

Oil and Mist Resistance (Crucial for Machining): Machining operations involve cutting fluids, coolants, and oil mists. Standard filters quickly become "blinded" by this oily residue. Polyester media can be treated with oil and water repellent coatings or a full PTFE membrane to resist moisture and oil penetration, ensuring consistent airflow and longer life.

Antistatic Safety Options: When dealing with fine aluminum or titanium dust, there is a significant risk of combustible dust explosions. Anti-static (aluminized or carbon-impregnated) polyester cartridges safely dissipate static charges, mitigating this hazard.

Key Technical Specifications

Feature Metalworking Requirement

Efficiency MERV 11 – MERV 15 (depending on process)

Media Type Heavy-duty spun-bonded polyester

Coatings PTFE Membrane (for sticky/oily dust/fumes), Anti-Static (for aluminum/titanium dust)

Core Construction Galvanized or Stainless Steel (corrosion resistant)

Max Temp Up to 93°C (200°F)

Primary Metalworking Applications

Welding and Fume Extraction: Capturing hazardous fumes and particulate generated by arc welding, MIG, and TIG processes.

Grinding and Deburring: Managing coarse swarf and fine abrasive dust generated during finishing operations.

Laser/Plasma Cutting: Handling the high volume of fine metallic oxide fumes produced during thermal cutting.

Machining Centers: Used in mist collectors to filter aerosolized cutting fluids and oil mists.