昭通製藥（yào）廠高效過濾（lǜ）器

關於高效過濾器的更換（huàn）周期方麵的問題，很多潔淨室用戶都很關心，畢竟高（gāo）效過濾器（qì）決定著潔淨室的潔（jié）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（yě）整理過相關方麵的問題：高效過濾器的更換標（biāo）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，高效過濾器（HEPA）用於生（shēng）產空間空氣的處理（lǐ）和過濾（lǜ）的終端（duān）過濾器。無菌生產要求強製使用高效過濾器，而固體和半固體劑型的生（shēng）產有時也會使用。H13至H14（DIN1822）是高效過濾器的（de）兩種，後者（zhě）截留率為99.995%。但多久必須（xū）更換一次呢？

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.

製藥廠高效（xiào）過濾器一（yī）般多久更換？

我（wǒ）們經常看到在公司內部文件中，要求每年更換過（guò）濾器，而（ér）不管檢測結（jié）果如何。這是否合理？在相關的（de）GMP指南（nán）中並沒有高效（xiào）過濾器可以使用期限的具（jù）體數值。根據GMP的要求，過濾器不得有泄漏（lòu），這需要通過確認和定期執行ISO14644-3中的泄漏測試，無菌車間來說這是必須的。根（gēn）據附錄1（PIC/S PI032-2）的技術詮釋，A/B級每6個月進行泄漏測試，C/D級則為12個月。FDA無菌指南要求進行定期檢查。附錄1的要求在這裏也適用。泄（xiè）漏是可以修（xiū）補的，但修補的麵積不能超過單個過（guò）濾器麵積的（de）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（líng）潔淨化高（gāo）效過濾器並（bìng）不隻有完整性一件事情。過濾器（層（céng））的負載以及（jí）上下遊壓差也（yě）很重要。如果（guǒ）過濾器上下遊壓差升高，則送排風係統的能量需求會增加，這樣才能維持必須的換氣次數。這樣（yàng）的過濾器上（shàng）下遊壓差可能（néng）會增加通風係統的性能限製。為了保護高效（xiào）過濾器（qì），就要使用前端過（guò）濾器---通常（cháng）是像F7和F9過濾器（qì）（EN779）這樣的精細過濾器（qì）。這些過（guò）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（yǐ）說最長使用期限直（zhí）接取決於上下遊壓（yā）差。隻（zhī）有在上（shàng）下遊壓差達到一定數值影響到通風係統的性能，或者是能量需求超過過濾器更換成本時（shí），過濾器更換才有意義（yì）。但是，過濾器必須能通過泄漏測試（如上所（suǒ）述）。事實上，很多公司並不會使用一個過濾器超過（guò）8年。正如前述，並（bìng）沒（méi）有法規規定這樣的值（zhí），這都隻是根據經驗得來的（de）。

靈潔高效過濾器更換問題（tí）

谘詢內（nèi）容：老師您好（hǎo），小容量注射劑車間空調係統的高（gāo）效過濾器必須定期更換嗎（ma）？如不定期更換，隻在空調驗證（zhèng）時更換風量不合格房間高（gāo）效和撿漏不合格高效可以嗎？

CFDA審核查驗中心回複：你（nǐ）好，更換高效過濾器根據空調驗證參考：時風（fēng）量和撿漏是必須的，但同（tóng）時也應製定出具（jù）體高效過濾器最長使用周期，故還是應（yīng）該有定期的概念。同時必須定（dìng）期（qī）進行（háng）過濾器完整性測試。

製藥廠高效過濾器一般（bān）多久更換？

潔淨區A級高效過濾器檢漏（lòu）

谘（zī）詢內容（róng）：潔淨區A級高效過濾（lǜ）器檢漏是否可以使用 塵埃（āi）粒子計數器 掃描（miáo）檢漏，如果可以（yǐ），那麽判斷（duàn）無泄漏的標（biāo）準是多少。

CFDA審核查驗中心回複：靈潔高效過濾器檢漏（lòu）一般在非關鍵區域可以使用塵埃（āi）粒（lì）子計數器，但A級（jí）潔（jié）淨區高效（xiào）過濾器不推薦使用（yòng）塵埃粒子計數器掃（sǎo）描檢漏