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　　醫院手術室初效、中效、高效過濾器更換周期是根據潔凈之后空氣中允許存在粒徑大于或等于0.5μm空氣灰塵粒子數的多少，凈化層流手術室可分為100000級、10000級、1000級、100級四級。其中，數字越高，凈化級別越低。

　　初效過濾器阻力已超過額定初阻力60Pa，或等于2×設計或運行初阻力3-6個月，超過標準隨時更換

　　中效過濾器阻力已超過額定初阻力80Pa，或等于2×設計或運行初阻力6-12個月，超過標準隨時更換

　　亞高效過濾器 阻力已超過額定初阻力100Pa，或等于2×設計或運行初阻力（低阻亞高效時為3倍）1年以上，超過標準隨時更換

　　高效過濾器阻力已超過額定初阻力160Pa，或等于2×設計或運行初阻力2-3年以上，超過標準隨時更換

　　手術室高效過濾器濾料一般用玻璃纖維，一般采用熱溶膠作為濾芯的分隔物，便于機械化生產。加之其具有體積小、重量輕、便于安裝、效率穩定、風速均勻的優點。具有重量輕，結構小巧，過濾面積大，低壓損，過濾精度高，運行成本低，可以有效控制0.1-0.3um微粒。

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新舊初效對比

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新舊袋式中效過濾器對比

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更換亞高效過濾器

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拆卸原有舊初效過濾器

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安裝更換新初效過濾器

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高效過濾器更換中

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初效過濾器更換中

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凈化機組更換初效過濾器后

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