This represents the Hankison series of precision compressed air duct filters (or compatible replacement filters) manufactured by the well-known American brand Hankison. The "24" in the filter model number indicates the outer casing flow rate, while the preceding letters (E1 to E9) represent different filtration levels and functions. They are typically installed in series after the air compressor to achieve progressive purification of compressed air.
Filter Levels and Functions: According to Hankison's official standards and technical specifications, the main functions of each level are as follows:
Hankison E9-24 (Main Line Filter): Function: General main line coarse filtration, primarily used to remove large amounts of liquid water droplets and solid particles larger than 3 microns. Common Applications: As the first line of defense after an air compressor, protecting downstream dryers and finer filter elements.
Hankison E7-24 (Air Line Filter): Function: Removes liquid water and oil mist, and filters out solid particles larger than 1.0 micron (residual oil content 1.0 mg/m³). Common Applications: Used for pre-protection of tools, motors, cylinders, and other general pneumatic equipment.
Hankison E5-24 (High-Efficiency Oil Removal and Coagulation Filter): Function: Coagulates extremely fine water vapor and oil mist, with a filtration accuracy of 0.01 micron (residual oil content as low as 0.01 mg/m³). Common Applications: Suitable for use in automated instruments, control valves, and pneumatic conveying systems with high air supply requirements.
Hankison E3-24 (Ultra-High Efficiency Oil Removal Precision Filter): Function: Ultra-high precision condensation filtration, specifically designed to intercept tiny oil mists and extremely fine particles larger than 0.01 microns (residual oil content controlled below 0.001 mg/m³). Common Applications: Often installed after adsorption dryers, or used in precision spraying and pneumatic precision instruments.
Hankison E1-24 (Activated Carbon Deodorizing Filter): Function: Utilizes activated carbon to adsorb oil vapors, hydrocarbons, and odors from compressed air (residual oil content as low as 0.003 mg/m³). Common Applications: Specifically designed for food processing, pharmaceutical packaging, respiratory gases, and high-tech electronic wafer production, requiring top-grade oil-free and odorless air sources.