三門峽製藥廠高效（xiào）過濾器

關於高效過濾器的更換周期方麵的問題，很多潔淨室用戶都很關心，畢竟高效過濾器決定著（zhe）潔淨室（shì）的潔淨（jìng）度能否達到（dào）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（gèng）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生產有時也會使用。H13至H14（DIN1822）是高效過濾（lǜ）器的兩種，後者截留率為99.995%。但多久（jiǔ）必須更（gèng）換一（yī）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（duō）久更換？

嫩草影院經常看到在公司內部文（wén）件中，要求每年更換過濾器，而不管檢測結果如（rú）何。這是否合理？在相關的GMP指（zhǐ）南中並沒有（yǒu）高效過濾器可以使用期限的具體數值。根據GMP的要（yào）求，過濾器不得有泄漏，這需要（yào）通（tōng）過確（què）認和定期（qī）執行ISO14644-3中的泄漏測試，無菌車間來說這（zhè）是必須的。根據附（fù）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（gè）月。FDA無（wú）菌指南要求進行（háng）定期檢查。附錄1的要求在（zài）這裏也適用（yòng）。泄漏是可以修補（bǔ）的，但修補的麵積不能超（chāo）過單個過濾器（qì）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。過濾器（qì）（層）的（de）負載以（yǐ）及上下遊壓差也很重（chóng）要。如（rú）果過濾器上下遊壓差升高（gāo），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（shù）。這樣的過濾器上下遊（yóu）壓差可能會增加通風（fēng）係統的性能限製。為了保護高效過濾器，就要使用前端（duān）過（guò）濾器---通（tōng）常是像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（bǎo）護高效過濾（lǜ）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（jiàn）角度來看，嫩草影院可以說最長使用期限（xiàn）直接（jiē）取決於上下遊壓差。隻有在上下遊壓差達到（dào）一定數（shù）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（yì）義。但（dàn）是，過濾器必須能通過泄（xiè）漏測（cè）試（如上所述）。事實上，很多公司並（bìng）不會使用一個過濾器超過8年。正如前述（shù），並沒有法規規（guī）定這樣的值，這都隻是根據經驗（yàn）得來的。

靈潔高效過濾器更換問題

谘詢內容：老師您好，小容量注射劑車間空調係統的高效過濾器必須定（dìng）期更換嗎？如不定期更換，隻在空調驗證時更換風量（liàng）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：你好，更換高效過濾（lǜ）器根據空調驗證參考：時風量和撿（jiǎn）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（zhōu）期，故還是應該有定期的概念。同（tóng）時必須定期（qī）進行過濾（lǜ）器（qì）完整性測試。

製藥廠高效過（guò）濾器（qì）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（guò）濾器檢漏是否可（kě）以使用（yòng） 塵埃粒子計數器 掃描檢漏，如果可以，那麽判斷無泄漏的標準是多少。

CFDA審核查驗中心回複：靈潔高效過濾器檢漏一（yī）般在非關鍵區域可以使用塵埃粒子計數（shù）器，但A級潔淨區高效過濾器不推（tuī）薦使用塵埃粒子計數器掃描檢（jiǎn）漏（lòu）