CLEAN AIR AND CONTAINMENT REVIEW

CACR52 is now out with two potentially game-changing articles.

The first of these shows how a scientific approach to determining airflow rates in a non-UDAF cleanroom gives airflow rates that are significantly lower than those derived from recommended air change rates in current regulatory documents.

The second of these shows how, when carrying out particle counting with an LSAPC and a remote sampling head, particle losses for ≥5.0μm particles can be greatly reduced by increasing the internal diameter of the of the sample tubing.

Another article -based an extract from the recently published second edition of Bill Whyte's book Advanced Cleanroom Technology- describes some of the equations that are used to calculate airflow rates in the first article. The book is also reviewed in this issue of CACR.

Finally, "Is your HEPA filter working properly?" explains the importance of site tests for HEPA filters that have already been tested in the factory and the importance of employing test engineers who have been properly certified, for example by the CTCB-I (Cleanroom Testing and Certification Board - International | CTCB-I Website: www.ctcbi.net).  


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