Automated Filter Element Test System

Test System for production control of filter elements (e.g. exhaust filter, HEPA filter)

For the purpose of 100% inspection of the integral filter separation efficiency during production, especially for exhaust filters and HEPA filters used in vacuum cleaners and mobile air cleaners.

Production control demands for short test cycles while using robust, compact, service-reduced and safe technologies. A test cycle includes therefore the supply, the analytical characterisation and the re-moval of the test specimen. Due to its measurement concept and high degree of automatisation, the system enables reliable testing with measurement times of 30 s.

To ensure a full traceability, determined test data can be integrated directly into in-house databases by combining the filter test system with techniques for test specimen identification (e.g., bar code or QR code scanner).

Applications

production control of integral separation efficiency of exhaust particle filters (GPF, DPF)

quality control of HEPA filters or filter cartridges of e.g. industrial vacuum systems

research and development on any small air filter elements

Benefits

test system designed for 24/7 operation with automated safety functions

short test cycles (supply, analysis, removal) for separation efficiency and pressure drop

quality criteria for separation efficiency and pressure drop are freely configurable

minimal loading of test specimen (higher lifetime of products)

Principle

A defined volumetric flow rate is sucked by a controlled blower from the environment through a HEPA inlet filter, the test duct and a safety filter. The test duct is composed of three functional sections, i.e., sections for i) the generation and characterisation of the test aerosol (upstream aerosol), ii) the incorporation of the test specimen (specimen adapter) and iii) the characterisation of the downstream aerosol.

Technical data