崇左製藥廠高效過（guò）濾器

關於高效過濾器的更換周期方麵的問（wèn）題，很多潔淨室用（yòng）戶都很關心，畢竟高（gāo）效過濾（lǜ）器決定著（zhe）潔淨室的（de）潔淨度能否達到標（biāo）準，就在前方草莓秋葵菠萝蜜黄瓜榴莲视频（men）也整（zhěng）理過相關方麵的問題：高效過濾器的更換（huàn）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（guò）濾器（HEPA）用於（yú）生產空間空氣（qì）的處理和過濾的終端過濾器。無菌生產要求強製使（shǐ）用高效過濾器，而（ér）固體（tǐ）和半固體劑型的生產有時也會使用。H13至H14（DIN1822）是高效過濾器的兩（liǎng）種，後者（zhě）截留率為99.995%。但多久必須更換一次（cì）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（chǎng）高（gāo）效過濾（lǜ）器一般多久更換？

草莓秋葵菠萝蜜黄瓜榴莲视频經常看到在公司（sī）內（nèi）部文（wén）件中，要求每年更換過濾器，而不管（guǎn）檢測結果如何。這（zhè）是否合理？在相關的GMP指南中並（bìng）沒有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（yǒu）泄漏，這需（xū）要通過確認和定期執（zhí）行ISO14644-3中的泄漏測試，無菌車（chē）間來說這是必須的。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個月。FDA無菌指南要求進行定期檢查。附錄1的要求在這裏（lǐ）也（yě）適用。泄漏是可以修補的，但修補的麵積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（rán），廣州靈（líng）潔淨化高（gāo）效過濾器並不隻（zhī）有完整性一件事情。過（guò）濾器（層）的負載（zǎi）以及上下遊壓差（chà）也很重要。如（rú）果過濾器上（shàng）下遊壓差升高，則（zé）送排風係統的能量需求會增加，這樣才能維持必須的換氣（qì）次數（shù）。這樣的過濾器上下遊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，就要使用前端過濾器---通常是像F7和F9過濾器（EN779）這樣的精細過（guò）濾器。這些過濾器必須定期更（gèng）換以保護高效過濾器避免堵塞（sāi）

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（yòng）期限直接（jiē）取（qǔ）決於上下遊（yóu）壓差。隻有（yǒu）在（zài）上下遊壓（yā）差（chà）達到一定數值影（yǐng）響到通風係統的（de）性能，或者（zhě）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。但是（shì），過濾器必須能通過泄漏測試（shì）（如上所述）。事實上，很（hěn）多公司並不會使用一個過濾器超過（guò）8年。正如前述，並沒有法規規定這樣的值，這都（dōu）隻是根據經驗得（dé）來（lái）的（de）。

靈（líng）潔高效過濾器更（gèng）換問題

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

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

製藥廠高效過濾器一般（bān）多久更換？

潔淨區A級高效過濾器檢（jiǎn）漏

谘詢（xún）內（nèi）容：潔淨（jìng）區A級高效過濾器（qì）檢漏是否可以使用 塵埃粒子計數器 掃描檢漏，如果（guǒ）可以，那麽（me）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（jiǎn）漏一（yī）般在非關鍵區域可以使用塵埃粒子計數器，但A級潔淨區高效過濾器不推薦使用塵埃（āi）粒子計數器掃描檢漏