茂名（míng）製藥（yào）廠高效過濾器

關於高效過濾（lǜ）器的（de）更換周期方麵的問題，很多潔淨室用戶都很關心，畢竟（jìng）高效過濾器決定著（zhe）潔（jié）淨室的（de）潔（jié）淨度能否達到標準，就在前方（fāng）草莓秋葵菠萝蜜黄瓜榴莲视频也整理過相（xiàng）關方麵（miàn）的問題：高效（xiào）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（qì）（HEPA）用於生（shēng）產空間空氣的處理和過濾的終端過濾器。無菌生產要求（qiú）強製使用高（gāo）效過濾器，而固（gù）體和（hé）半固（gù）體劑型的生產有時也會使用。H13至H14（DIN1822）是高效過濾器（qì）的兩種，後者截留率為99.995%。但多久必須更（gèng）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.

製藥廠高效過（guò）濾器一般多久更換？

我（wǒ）們經常看到在公司內（nèi）部文件中，要求每年（nián）更換過濾器，而不管檢測結果（guǒ）如何。這是否合理？在相關的GMP指（zhǐ）南中並沒有（yǒu）高效過濾（lǜ）器可（kě）以使用期限的具體數值。根據GMP的要求，過濾器不得有（yǒu）泄漏，這需要通過確認和定期執行（háng）ISO14644-3中的泄漏測試，無菌車間來說這是必須的。根據附錄1（PIC/S PI032-2）的（de）技（jì）術詮釋，A/B級每6個（gè）月進行泄漏測試，C/D級則（zé）為12個月。FDA無菌指南要求進行定期檢查。附錄1的要求（qiú）在這（zhè）裏（lǐ）也適用。泄漏是可以修補（bǔ）的，但修補（bǔ）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（jié）淨化高效過濾器並不（bú）隻有完整性一（yī）件事情。過濾器（層（céng））的（de）負（fù）載以及上下遊壓差也很重要。如果過濾（lǜ）器上下遊壓差升高，則送排風係統（tǒng）的能量（liàng）需求會增加，這樣才能維（wéi）持必須的換氣次（cì）數。這（zhè）樣的過濾器上下（xià）遊壓（yā）差可能會增加通（tōng）風係統的（de）性能限製。為了（le）保護高效過濾（lǜ）器，就要使用前端過濾器---通常是像F7和F9過濾（lǜ）器（EN779）這樣的精細過濾（lǜ）器。這些過濾（lǜ）器必須（xū）定期更換以保護高效過濾器避免堵（dǔ）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（men）可以說最長使用期限直接取決於上下（xià）遊壓差。隻有在上下遊壓差達到一定數值影響到通風（fēng）係統的（de）性（xìng）能，或者是能量需求超過過濾器更換成本時，過濾器更（gèng）換才（cái）有意義。但（dàn）是，過濾器必須能通過泄漏測試（如上所（suǒ）述）。事實上（shàng），很多公司並不會使用一個（gè）過濾器超過8年。正如（rú）前述（shù），並沒有法規規定這樣的值，這都隻是根據經驗得來的（de）。

靈潔高效過濾器更換問題

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

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

製藥廠高效過濾器一般多久更換（huàn）？

潔淨區A級高效過濾器檢漏

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

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（qū）域可以使（shǐ）用塵埃粒子計數器，但（dàn）A級潔淨（jìng）區（qū）高效過濾器不推薦使用塵埃粒子計數器掃描檢漏（lòu）