HEPA Filter Testing and Air Flow Visualisation

The correct functioning of HEPA filters is normally tested at the time of installation, as well as part of the routine maintenance programme. It is normally recommended that HEPA filters are checked at 14 month intervals or less, or immediately after filter changing. Where high efficiency filters are fitted, it is vital that the filter housing/sealing device does not allow particulate material to pass and thereby compromise the clean room environment that is being served. Testing is necessary since HEPA filters can become partially or totally blocked, rendering the filter of little value.

The Filter Integrity Test, which uses smoke as a detection method, is usually referred to as a DOP test. This is because the original smoke used for this test was made using the chemical Di-Octyl Phthalate. However, as this substance was found to be carcinogenic, mineral oil is now used with identical results.

The ViCount Aero range is used throughout the world by major blue chip pharmaceutical, nuclear and clean room specialists for their HEPA filter testing requirement.

For Air Flow Visualisation, our portable, water based generators are ideal as they enable the tester to move from one part of the room to another, making smoke, in order to ‘see’ if the flow of air is correct.

Concept Recommends

For HEPA Filter Testing

• ViCount Aero

For Air Flow Visualisation

• Concept AirTrace 12v system
• Flow Check 12v system
• Colt 4