南京製藥廠高效過（guò）濾器

關於高效過濾器（qì）的更換周期（qī）方（fāng）麵的問題，很多潔淨室用戶都很關心，畢竟高效過（guò）濾器決定著潔淨室的潔淨度能否達到標準，就在前方我（wǒ）們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）用於生產空間空氣的處理和過（guò）濾的終端過濾器（qì）。無菌生產（chǎn）要求強製使用高效過濾（lǜ）器，而固體和半固體（tǐ）劑型（xíng）的生產有時也會使用。H13至H14（DIN1822）是高效過濾器（qì）的兩（liǎng）種，後者截（jié）留率為99.995%。但多久必須更換一次呢？

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（kǎo）：（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（zhì）藥廠（chǎng）高效過（guò）濾器一般（bān）多久更換？

国产乱子伦一区二区三区經（jīng）常看到在公（gōng）司內部文（wén）件中，要求每年更換過濾器，而不管檢測結果如何。這是否合理？在相關（guān）的（de）GMP指南中並（bìng）沒（méi）有高效過（guò）濾（lǜ）器可以使用（yòng）期（qī）限的具體數值（zhí）。根據GMP的要（yào）求（qiú），過（guò）濾器不得有泄（xiè）漏，這（zhè）需要通（tōng）過確認和定期執行ISO14644-3中的泄漏測試，無菌車間（jiān）來說這（zhè）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（zhè）裏也適用。泄漏是可（kě）以修補的，但修補的麵積不能超過單個過濾器麵積（jī）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（層（céng））的負載（zǎi）以及上下（xià）遊壓差也很重要。如果過濾器上下遊壓差升高，則送排風係統的能量需求會（huì）增加，這樣才能維持必須的換氣（qì）次數。這樣的過濾（lǜ）器（qì）上下（xià）遊壓差（chà）可能會增加通風係統的（de）性（xìng）能限製（zhì）。為（wéi）了保護高效過濾器（qì），就（jiù）要使用前端過濾器---通常是像F7和F9過濾（lǜ）器（EN779）這樣的（de）精細過濾器。這些（xiē）過濾器必須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，国产乱子伦一区二区三区可以說最長使用（yòng）期限直接取決於上下遊壓差。隻有在上下遊壓差達到（dào）一（yī）定（dìng）數值影響到通風係統的性能，或者是能量需求超過過（guò）濾器更換（huàn）成本時，過濾器更換才有意義。但是，過濾器（qì）必須能通過泄漏測試（如上所述）。事實上，很（hěn）多公司並不會使用一個過濾器超過8年。正如前述，並沒有法規規（guī）定這樣的值，這（zhè）都隻是根據經驗得來（lái）的。

靈潔高效過濾器更換（huàn）問題

谘詢內容：老師您（nín）好，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？如（rú）不定期（qī）更換，隻在（zài）空調驗證時更換風（fēng）量不合格房間高效和撿漏不合（hé）格高效可以嗎（ma）？

CFDA審核查（chá）驗中心回複（fù）：你好，更換高效過（guò）濾器根據空（kōng）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（zhǎng）使用周（zhōu）期，故還是應該有定期（qī）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（xiào）過濾（lǜ）器（qì）檢漏

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 掃描檢漏（lòu），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（lǜ）器不推薦使用塵埃粒子計（jì）數器掃描檢漏