肇慶製藥廠高（gāo）效過濾器

關於高效過濾器的更換周期方麵（miàn）的問題，很多潔淨室用戶都很關心，畢（bì）竟高效（xiào）過濾器決定（dìng）著（zhe）潔淨室的潔淨（jìng）度能否達到標準，就在前方草莓秋葵菠萝蜜黄瓜榴莲视频（men）也整理過相關方（fāng）麵的（de）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（yè），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（lǜ）器，而固體和半固體（tǐ）劑型的生產有時（shí）也會（huì）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（yào）廠高效過濾器一般多久（jiǔ）更（gèng）換？

草莓秋葵菠萝蜜黄瓜榴莲视频經常看到在公司內部文件中，要求每年更換過濾器，而不管檢測（cè）結果如何。這是否合理？在相關的GMP指（zhǐ）南中並沒有高效過濾器（qì）可以使用期限的具體（tǐ）數值。根據GMP的要求（qiú），過濾器不得有泄漏，這需要通過確認和定期執行ISO14644-3中的泄漏測試，無菌車間來說這是必須的。根據附錄（lù）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（nán）要（yào）求進行（háng）定期（qī）檢（jiǎn）查。附錄1的要求在這裏也適（shì）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，廣州靈潔淨化高效過濾器並不隻有（yǒu）完整性（xìng）一件事情。過濾器（層）的負（fù）載以及上下遊（yóu）壓差也很重要。如果過濾（lǜ）器上下遊壓差升（shēng）高，則送排風係統的能量需（xū）求會增加，這樣才能維持必須（xū）的（de）換氣次數（shù）。這樣的過濾器上下（xià）遊壓差可能會增加通風係統的性能限製（zhì）。為了保護高效過濾器，就（jiù）要使用（yòng）前端過（guò）濾器（qì）---通常（cháng）是像F7和F9過濾（lǜ）器（EN779）這樣（yàng）的精細過（guò）濾器。這（zhè）些過濾器（qì）必須定（dìng）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，草莓秋葵菠萝蜜黄瓜榴莲视频可以說最長（zhǎng）使用期限直接取決（jué）於上下遊壓差。隻有在上下遊壓差達到一定數值影響到通（tōng）風係統（tǒng）的性能，或者（zhě）是能量需求超過過濾器更換成本時，過濾（lǜ）器（qì）更換才（cái）有意（yì）義。但是，過濾（lǜ）器必須能通（tōng）過泄漏測試（如上所述）。事實上，很多公司並不（bú）會使（shǐ）用一個過濾器超過8年。正（zhèng）如前述，並（bìng）沒有法規規定這樣的值，這都隻是根據經驗得來的。

靈潔高效過濾器更換問題（tí）

谘詢內容：老師您好（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？如不定期更換，隻在（zài）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審核查驗中心回複：你好，更換高效過濾器根據空調驗證（zhèng）參考：時風（fēng）量和撿（jiǎn）漏是必須的，但同時也應製（zhì）定出具體高效過濾（lǜ）器最長使用（yòng）周期，故還是應該有定期的（de）概念。同時必（bì）須（xū）定期進行過（guò）濾器（qì）完整性（xìng）測試（shì）。

製（zhì）藥廠高效（xiào）過濾器（qì）一般多久更換？

潔淨區A級高效過濾器檢（jiǎn）漏

谘詢內（nèi）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，如果可（kě）以，那麽（me）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（jiàn）區（qū）域可以使用塵埃粒（lì）子計數器，但A級（jí）潔淨區高效過濾器不推薦使用（yòng）塵（chén）埃粒子計數器掃描檢漏