忻州製藥廠高效過濾器

關於高效過濾器的更換周期方（fāng）麵的問題，很多潔淨室用戶（hù）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，就在前方嫩草影院也整理過相關方麵的問（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，高效過濾器（HEPA）用於生產空間空氣的處理和過濾的終端過濾（lǜ）器。無菌生產要求強製使用高效過濾器，而固體和半固（gù）體劑型的生產有時（shí）也會使用（yòng）。H13至H14（DIN1822）是高效過濾器的兩種，後者（zhě）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.

製藥廠高效過濾（lǜ）器一般多（duō）久更換？

嫩草影院經常看到在公司內部文（wén）件中，要（yào）求每年（nián）更（gèng）換過濾器，而不管檢測結果如何。這是否（fǒu）合理？在相關的GMP指南中並沒有高效過濾器可以使用期限的（de）具體（tǐ）數值。根據GMP的要求（qiú），過濾器不得（dé）有泄（xiè）漏，這需要通過確認和（hé）定期執行ISO14644-3中的泄漏測試，無菌車間來說這是必須的。根據（jù）附錄1（PIC/S PI032-2）的（de）技術詮釋，A/B級每6個月進行泄漏測試，C/D級則為（wéi）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。泄漏是可以修補的（de），但修補的（de）麵積不能（néng）超過單個（gè）過（guò）濾（lǜ）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（qì）並不（bú）隻有完整性（xìng）一件事（shì）情。過濾器（層）的負載以及上下遊壓差也很重要。如果過（guò）濾（lǜ）器上下遊壓差升高，則送排風係統的能量需（xū）求會增加，這（zhè）樣才能維持必須的換氣次（cì）數。這樣的過濾器上下遊壓差可能會增加（jiā）通風係（xì）統的性（xìng）能限製。為了保護高效過濾器，就要使用（yòng）前端過濾器---通常是像F7和F9過（guò）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，嫩草影院可（kě）以說最長使用期限直接（jiē）取決於上（shàng）下遊壓差。隻有在上下遊（yóu）壓（yā）差達到一定數值影響到通風係統的（de）性能，或者（zhě）是能量需求超（chāo）過過濾器更換成本（běn）時，過濾器更換才有意義。但是，過濾器必須（xū）能通（tōng）過（guò）泄漏測試（如上所述）。事實上，很多公司並不會使用（yòng）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，這都隻是根據經驗得來的。

靈潔高（gāo）效（xiào）過濾器更換（huàn）問題

谘詢內容：老（lǎo）師您好（hǎo），小容量注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，隻在空調驗證時更換（huàn）風量不合格房間高效和撿漏不合格高效可以嗎？

CFDA審核查驗中心回（huí）複：你好，更（gèng）換高效過（guò）濾器根據空調驗證參考（kǎo）：時風量（liàng）和撿漏（lòu）是必須的，但同時也（yě）應製定出具體高效過濾（lǜ）器最長使用周期，故還（hái）是應該有定期的概念。同（tóng）時（shí）必須（xū）定期進（jìn）行過濾器完（wán）整性測試（shì）。

製藥廠高（gāo）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A級高效過濾器檢漏是（shì）否可以使用（yòng） 塵埃（āi）粒子計數器 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（chá）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（yòng）塵埃粒子計數器，但A級潔淨區高效過濾器（qì）不推薦使（shǐ）用塵埃粒子計數器掃描檢漏