ISO 23328-1:2008 Breathing System Filters for Anaesthetic and Respiratory Use- Part 1: Salt-test method to assess filtration performance

This part of ISO 23328 gives a method of test for assessing the filtration performance of breathing system filters (BSF).

In the test, the BSF is challenged with sodium chloride particles of the most penetrating size range, 0.1~0.3μm.

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Air filters are silent sufferers – no one thinks about them because they usually don’t break or make noise. Yet, they’re an important part of your HVAC system – not only helping keep your equipment clean and free of debris, but also helping to keep indoor air clean by capturing particles like dust,

Comparison Table - Filtration Performance Requirement of Different Respirator Standard等级Level 标准Standard颗粒过滤效率PFE测试介质Aerosol流量Flow(L/min)呼气阻力Exhalation Resistance(Pa)吸气阻力InhalationResistance(Pa)备注*Remark＞80%＞90%＞94%＞95%＞99%＞99.97%GB 2626-2019KN90KN95KN100NaCl85170/210/250*170/210/250*无呼气阀KP90KP9