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AFC 132 QC HEPA – HEPA Filter Element Quality Control Test System

This air filter test system is designed to meet requirements of EN1822-4 Appendix E “efficiency leakage test for particle sizes from 0.3 µm to 0.5 µm”. This part of the standard is related to filter elements which cannot be scanned due to their geometrical design. In this case determination of integral filtration efficiency is sufficient for quality control.


In comparison to the alternative oil thread test procedure this method gives much more reliable and much faster results on defective filter elements. Furthermore filters are much less loaded by test aerosol from the test procedure.

The required test aerosol is produced by a special aerosol generator (ATM 221) using standard DEHS test liquid. For upstream concentration measurement an optical particle counter is used in combination with cascaded self-adjusting dilution systems (DIL 540/C). A parallel optical particle counter determines downstream particle number concentration. Resulting filter efficiency is compared to nominal filter efficiency giving a final “pass” or “fail” result to each tested filter.

  • Free configuration of target filter efficiency
  • Customized filter adapter for different small HEPA filter elements, easy to change (5 min)
  • Compact test system design
  • High degree of automation for minimum operator interactions
  • Designed for 24/7 production operation
  • Fast cycle time (30 s) for short test time per filter
  • Efficiency testing of small HEPA filter elements
  • Confirmation of nominal HEPA filter class
  • Suitable for integrated filter production control
Air flow rate7 … 35 l/s (25…126 m³/h)
Maximum filter adapter dimension300 x 300 x 300 mm
Test cycle time30 s
Filter cross sectionCustomer specific
Face velocityCustomer specific
Differential pressure3000 PA ± 1% v.E.
Climate sensorsTemperature, relative humidity, air pressure
Test aerosolDEHS
Aerosol GeneratorATM 221
Dilution systemsDIL 540/C (3 x 1:100/:10) (1:10 … 1:100.000)
Particle counter with vacuum pump4 Kanal 0.3/0.5/0.7/1.0 µm4 Kanal 0.1/0.2/0.3/0.5 µm8 Kanal 0.1/0.15/0.2/0.25/0.3/0.5/ 0.7/1.0 µmOptional particle measurement technology on request
Power supply3 x 400 VAC, 50/60 Hz, 16A
Dimensions (H x W X D)1500 x 2000 x 1000 mm
Weightapprox. 600 kg

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