湖州製藥（yào）廠（chǎng）高效過濾器

關於高效（xiào）過濾器的更換（huàn）周期方麵的（de）問題，很（hěn）多潔（jié）淨室用戶都很關心，畢竟高效過濾器決（jué）定（dìng）著潔淨室的潔淨度能否達到標（biāo）準，就在（zài）前方91小视频也整理過相關方麵的問題：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，高效過濾器（HEPA）用於生產空（kōng）間空氣（qì）的處理和過濾的終端過濾器。無菌生產要（yào）求強製使用高效過濾器，而固體和半固體（tǐ）劑型的生產有時也會使用（yòng）。H13至H14（DIN1822）是高效過濾（lǜ）器的兩種，後者截（jié）留率（lǜ）為99.995%。但多（duō）久必須更換一次呢？

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.

製藥廠高效過濾器一般多久更換？

91小视频（men）經常看到在公司內（nèi）部文件中，要求每年更換過濾器，而不（bú）管檢（jiǎn）測結果如何。這（zhè）是否合理？在相關的GMP指南中並沒有（yǒu）高效過濾器可以使用期限的具體（tǐ）數值。根據GMP的要求，過濾器不得有（yǒu）泄（xiè）漏，這需（xū）要通過確認和定期執行ISO14644-3中的泄漏測試，無菌車間來（lái）說這是必須的。根據附錄1（PIC/S PI032-2）的技術詮釋，A/B級每6個月進行（háng）泄漏測試，C/D級則為12個月。FDA無菌指南要求進（jìn）行定期檢查。附錄1的要求在這裏也適（shì）用。泄漏是（shì）可以修補的，但修補的麵積不能（néng）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（wán）整性一件事情。過濾器（層）的負載以及上下遊壓差也很重要。如果過濾器上下遊壓差升高（gāo），則送（sòng）排風（fēng）係統的能量（liàng）需求會增（zēng）加，這（zhè）樣才能維持必須的換氣（qì）次數。這樣的過濾器上下遊壓差可能會增加通風係統的性能限製。為（wéi）了保護高效過濾器，就（jiù）要使用前端過濾器---通常是像F7和（hé）F9過濾器（EN779）這樣的精細過濾器。這些過濾器（qì）必須定（dìng）期（qī）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，91小视频可以說最長使用期限直接取決（jué）於上下遊壓差。隻有在上下（xià）遊壓差達到一（yī）定數（shù）值影響到通風係統的性能，或者是（shì）能量需求超過（guò）過濾器更換成本時，過濾器（qì）更（gèng）換才有（yǒu）意義。但是，過（guò）濾器必須能通（tōng）過泄漏測試（如上所述）。事實上，很多公司並（bìng）不會使用一個（gè）過濾器超過8年。正（zhèng）如前述，並沒有（yǒu）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

谘詢內容：老師您好（hǎo），小（xiǎo）容量注射劑車間空（kōng）調係統的高效過濾器必須定期更換嗎？如不定期更換，隻在空調驗證時更換風（fēng）量不合格房間高效和（hé）撿漏不合格高效可（kě）以嗎？

CFDA審核查驗中（zhōng）心回複：你好，更換（huàn）高效過濾器根據空調（diào）驗證參考：時風量和撿漏是必須的，但同時（shí）也（yě）應製定出具體高效過濾器最長使用周期（qī），故還是應該（gāi）有定期的概念。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？

潔淨區A級高效過濾器檢漏（lòu）

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

CFDA審核查驗中心回複：靈潔高效過濾器檢漏一般在非（fēi）關鍵區域可以使用塵埃（āi）粒子計數器，但A級潔淨區（qū）高效過濾器不（bú）推薦使用（yòng）塵埃粒子計數器掃描檢漏