AFS 155 Test System for oil thread leak test of HEPA filter according to ISO 29463-4 (EN 1822-4)
The oil thread test mentioned in ISO 29463-4 (1822-4), annex A is used for visual proof of the absence of leakage of HEPA filters. This simple quality test procedure may be an alternative to the scan method.
The oil thread test (DOP Test) is also applicable if the scan method is not fully applicable because of the filter design (e.g. V-shaped arrangements).
downloadproduct sheet AFS 155
- cost-effective solution for leak testing of filters ranging up to group H (filter class H13 and H14)
- easy manual operation
- constant test conditions due to pre-adjustable test parameters
- effective testing of larger numbers with pre-adjusted test parameters
- flexible and easily configurable filter holder for different filter dimensions
- integral visual leak testing of HEPA/ULPA filters
The filter element (sample) is mounted horizontally with the upstream side down on the test bench and secured with a pneumatically operated fixing device. For testing, the filter is then exposed to a flow of a polydisperse aerosol of oil droplets (DEHS).
An existing leak is made visible on a rising oil thread on the downstream side (upper side) of the filter.
|test flow rate||l/min||50 - 600|
|dimension of test specimen (w × h × d)||mm||min. 305 × 305 × 30 | max. 915 × 800 × 300|
|operating medium, aerosol substance||-||DEHS|
|operating medium, gas/air - compressed air supply||bar||6|
|power supply||-||230 VAS 1A|
|dimensions (w × h × d)||mm||1200 × 610 × 910|
- Housing and Lightning
AFS 152 Test System for manual scan testing of HEPA and ULPA filters according to ISO 29463-4 (EN 1822-4) and ISO 29463-5 (EN 1822-5)
AFS 150 Test System for automated scan testing of HEPA and ULPA filters according to ISO 29463-4 (EN 1822-4) and ISO 29463-5 (EN 1822-5)