Test Principles Most integrity testing methods are time consuming and difficult to perform, however, testing with Valairdata 4 is simple. An aerosol challenge of test filters is performed with an FDA approved aerosol containing particles in the size range 0.2μm to 0.3μm, simulating an actual bacterial challenge under worst case conditions. The filtered gas is then passed through a laser particle counter and any aerosol penetration through the filter is measured and calculated as a percentage penetration. On this basis a pass or fail result is established. Independent validation has correlated this method to aerosol challenges with B. subtilis, P.aeruginosa and MS2 coliphage according to ASTM guidelines. Any filter which passes Valairdata 4 testing is therefore capable of providing sterile gas to your process. EMEA Product Information Centre Free phone: 00 800 27 27 5374 (fromAT, BE, CH, CZ, DE, DK, EE, ES, FI, FR, IE, IL, IS, IT, LU, MT, NL, NO, PL, PT, RU, SE, SK, UK, ZA) US Product Information Centre Toll-free number: 1-800-27 27 537 www.parker.com/bioscience Limitations of Liquid Based Tests Advantages of Aerosol Challenge Testing Long stabilization and test times. Speed – the test is much quicker than liquid based tests, with no stabilization times involved. The requirement to fully wet out the test filter with low surface tension liquid (e.g. IPA). The requirement to dry filter cartridges after testing. Efficiency – in a dry gas process no flushing or drying of the test filter is required, so the filter can be returned to process immediately after testing. Inaccuracies for multi-cartridge times. Accuracy – the test is more accurate for larger systems as the actual retention efficiency of the filter system is measured. To find out more visit parker.com/V4 © 2023 Parker Hannifin Corporation. All rights reserved. Catalogue BRO_BEFE_VALAIRDATA4-01
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