AFS 155 Test System

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).

Standards

ISO 29463-4

EN 1822-4

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product sheet AFS 155

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Benefits

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

Applications

integral visual leak testing of HEPA/ULPA filters

Principle

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.

Technical data

Parameter title	Unit	Value
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
weight	kg	approx. 100