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本文评价了用于纯化气体的超高效微粒空气过滤器(ULPA)。当使用颗粒尺寸在0.035～0.089μm的范围内的氯化钠微粒作实验,并保持压力差(压力降)为5～50磅/英寸~2时,其效率大于99.999997％。选择这个颗粒尺寸范围的原因是因为它代表了这些过滤器的最能穿透颗粒尺寸。PVDF膜过滤器(Watergard牌)的测试证明,超高效微粒空气过滤器的性能能够满足生产价值的设备的要求。
This article evaluates ultra-high efficiency particulate air filters (ULPA) for purifying gases. The efficiency is greater than 99.999997% when tested using sodium chloride particles having a particle size in the range of 0.035 to 0.089 μm while maintaining a pressure differential (pressure drop) of 5 to 50 psia. The reason for choosing this particle size range is because it represents the most penetrating particle size for these filters. Testing of PVDF Membrane Filters (Watergard) proves that the performance of the Super Efficient Particulate Air Filters meets the requirements of equipment of production value.