What filtration accuracy is required for self-cleaning air filters used in air compressor intakes?

Liefert self-cleaning air filters for air compressor intakes typically require a filtration accuracy of 1μm, with some high-precision models reaching 0.3μm to 2μmdepending on the application and requirements.

A 1μm filtration accuracy is the common standard for industrial-grade air compressors, effectively intercepting particles with a diameter ≥1μm, 

such as dust and pollen, meeting the requirements for general industrial applications in ISO 8573-1. This accuracy ensures filtration efficiency while avoiding increased pressure drop due to excessive precision, thus reducing energy consumption and maintenance costs.

High-precision filtration of 0.3μm to 2μm is suitable for scenarios with higher air cleanliness requirements, such as oxygen plants, blast furnace blowers in steel plants, and gas turbines. 

These applications require filtering finer particles to prevent wear on equipment or impact on product quality. For example, a certain model of self-cleaning air filter can achieve a filtration efficiency of 99.99% at 2μm, meeting high-precision requirements.

The selection of filtration precision needs to comprehensively consider the following factors:

Application scenarios: 1μm is sufficient for general industrial scenarios; higher precision is required for special clean environments.

Equipment requirements: High-speed air compressors have higher requirements for intake air cleanliness, necessitating higher precision filtration.

Cost and benefits: High-precision filtration increases equipment costs and pressure drop; a balance must be struck between filtration effectiveness and operating costs.