蕪（wú）湖製藥廠高效過濾器

關於高效過濾器的更換周期方麵（miàn）的問題，很（hěn）多潔淨室用戶都很關心（xīn），畢竟高效過濾器決定著潔淨室的潔淨度能否達到標準，就在前方草莓秋葵菠萝蜜黄瓜榴莲视频也整理過相關方（fāng）麵的問（wèn）題：高效過濾器的更換標準

In the pharmaceutical industry, HEPA filters are used as terminal filters for the processing or filtration of air in production spaces. They are mandatory in sterile production, although they are sometimes also used in the manufacture of solid or semisolid dosage forms. Amongst the HEPA or high-efficiency particulate air filters are Filter Classes H13 to H14 (DIN 1822), the latter with a retention rate of 99.995%. But how often do they need to be changed?

在製藥行業（yè），高效過濾器（HEPA）用於生（shēng）產空間空氣的處理和過濾的終端（duān）過濾器。無菌生產要求強製使用高效（xiào）過濾器，而固體和半固體劑型的（de）生產有時也會使用。H13至H14（DIN1822）是高效過濾器的（de）兩種，後者截留率為99.995%。但多久必須更換（huàn）一次呢？

One can frequently find internal company guidelines according to which the filters should be changed annually, regardless of monitoring results. Is that sensible? An exact number, meaning the maximum duration of use for HEPA filters in months, cannot be found in the relevant GMP guidelines. According to GMP, the filter has to be free of leaks. This is verified by qualification and regularly performed leak tests as per ISO 14644-3, which are mandatory for sterile facilities. According to the technical 參考：（www.ljinghua.com）interpretation of the Annex 1 (PIC/S PI 032-2), leak tests are to be performed every six months in A/B zones and every twelve months in C/D zones. The FDA Aseptic Guide demands a regular inspection. The requirements of Annex 1 can be applied here as well. Leaks may be repaired; those repaired areas may only take up 0.5% of the filter surface per filter.

製藥廠高（gāo）效過濾器一般多久更換？

草莓秋葵菠萝蜜黄瓜榴莲视频經常看到在公司內部文件中，要求每年更換過濾（lǜ）器，而不管檢測（cè）結果（guǒ）如何。這是否合理？在相關（guān）的GMP指南中並沒有高效過濾器可以（yǐ）使用期限的具體數值。根據GMP的要（yào）求，過濾器不得（dé）有泄漏，這需要（yào）通過確（què）認和定期執行（háng）ISO14644-3中（zhōng）的泄漏（lòu）測試，無菌車間（jiān）來說這是必須的。根據（jù）附錄（lù）1（PIC/S PI032-2）的技術詮釋，A/B級每6個（gè）月進行泄漏測試，C/D級則為12個月（yuè）。FDA無菌指南要求進行定期檢（jiǎn）查。附錄1的（de）要求在這裏也適用。泄漏是可（kě）以修補（bǔ）的，但修補的麵積（jī）不能超過單個過濾器麵積的0.5%。）

However, not only the integrity of the HEPA filter is relevant. The load of the filter (layer) and thus the pressure drop at the filter is also important. If the pressure drop at the filter rises, the energy demand of the ventilation system increases to maintain the necessary air change rates. This pressure drop at the filter can increase to the performance limits of the ventilation system. To protect the HEPA filters, preliminary filters are used - usually fine particulate air filters like F7 und F9 filters (EN779). Those have to be replaced regularly and protect the HEPA filters from clogging.

當然，廣州靈潔淨化高效過濾器並不隻有完整性一件事情。過（guò）濾器（層）的負載以及上下遊壓差也很重要。如（rú）果過濾器上下遊壓差升高，則（zé）送排風係統的能量需求會增（zēng）加，這樣（yàng）才能維持（chí）必須的換氣次（cì）數。這樣的過（guò）濾器上下遊壓差（chà）可能會增加通風係統的性能限製。為了保護高效過（guò）濾器，就要使用前端過濾器---通常是像（xiàng）F7和F9過濾器（EN779）這樣的精細過濾器。這些過濾器必須定期更換以保護高效過濾器避免堵塞

From a practical viewpoint, one could say that the maximum duration of use depends directly on the pressure drop. Changing the filters only makes sense if the pressure drop gets too high for the performance of the ventilation system or if the cost of energy demand lies above the cost of a filter change. The filters do have to pass the leak tests (see above), of course. In practice, several companies do not use a filter for more than eight years. As mentioned before, though, this is not a legally binding value, but merely based on experience.

從實踐角度來看，草莓秋葵菠萝蜜黄瓜榴莲视频可以說最長（zhǎng）使用（yòng）期限直（zhí）接取決於上下遊壓差。隻有在上下遊壓差達到一（yī）定數值影響到（dào）通風係統的性能，或者是能（néng）量（liàng）需（xū）求超過過濾器更換成本時，過濾（lǜ）器更換才（cái）有意義。但是，過濾器必須能通過（guò）泄漏測試（shì）（如上所（suǒ）述）。事實上，很多公司並不（bú）會使用一個過濾器超過8年。正如前述，並沒有法規規定（dìng）這樣的值，這都隻是根據（jù）經驗得來（lái）的。

靈潔高效過濾器更換問題

谘詢內容：老師（shī）您好，小容量注射劑車間空調係統的高（gāo）效過濾器必（bì）須定期更換嗎？如不定（dìng）期更換，隻在空調驗證時更換風量不合格房間高效和撿漏不合格高效可（kě）以嗎？

CFDA審（shěn）核查驗中心回複：你（nǐ）好，更換高效過濾器根據空調驗（yàn）證（zhèng）參考（kǎo）：時風量和撿漏（lòu）是必（bì）須的，但同時也應製定出具體高效過濾器最長使用周期（qī），故還是應（yīng）該有定（dìng）期的概念。同（tóng）時必須定期進行過濾（lǜ）器完整（zhěng）性測試（shì）。

製藥廠高效過濾器一般多久更換？

潔淨區A級高效過濾器檢漏

谘詢內容：潔淨區（qū）A級高效過濾器檢漏是否（fǒu）可（kě）以使用 塵埃粒子計數器 掃描檢漏，如果可以，那麽判斷無泄（xiè）漏的標準是多少。

CFDA審核查驗中心回複（fù）：靈潔高效過濾器檢漏一般在非關鍵區域可以使（shǐ）用塵埃粒子（zǐ）計數器，但A級潔淨區高效過濾器不推（tuī）薦使用塵埃粒（lì）子（zǐ）計數器掃描檢漏