瀏（liú）陽製藥廠高效過濾（lǜ）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（hěn）關心（xīn），畢竟高效過濾（lǜ）器決定著潔淨室的潔淨度能否（fǒu）達到標準，就在前方我（wǒ）們也整理過相關（guān）方麵（miàn）的問題：高效過濾器的更換標（biāo）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（xiào）過濾器（HEPA）用於生產空間空氣的處理和（hé）過濾的終端過濾器。無菌生產要求強製使用高效過濾器，而固體和半固體劑型的生產（chǎn）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（cān）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久（jiǔ）更換？

草莓秋葵菠萝蜜黄瓜榴莲视频經常看到在公司內部文件（jiàn）中，要求每年更換（huàn）過濾（lǜ）器，而不管檢（jiǎn）測結果如何。這是否合理？在相（xiàng）關的GMP指南中並沒有（yǒu）高效過濾（lǜ）器可以使用期限的具體數值（zhí）。根據GMP的要求，過濾器（qì）不得有泄漏，這需要通過確認和定期執行ISO14644-3中的泄漏測（cè）試，無菌車間來說這是（shì）必（bì）須（xū）的。根據附錄1（PIC/S PI032-2）的技術詮釋（shì），A/B級每6個月（yuè）進行（háng）泄漏測試，C/D級則為12個月。FDA無菌指南要（yào）求進行（háng）定期檢查。附（fù）錄1的要求在這裏也適用。泄漏是可以修補的，但修補的麵積不能超（chāo）過單（dān）個過濾器麵積的（de）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（xiào）過濾器並不隻有完整性一件事情。過濾器（層）的負載（zǎi）以及上下遊壓差也很重要。如（rú）果過濾器上（shàng）下遊壓差升高，則送排風係統的（de）能量需（xū）求會增加，這樣才能維持必須的換氣次數。這樣的過濾器上（shàng）下遊壓差可能會增加通風（fēng）係統的性能限製。為（wéi）了（le）保護高效過濾器，就要使用前端（duān）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換（huàn）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（cóng）實踐角度來（lái）看，草莓秋葵菠萝蜜黄瓜榴莲视频可以說最長使（shǐ）用期限直接取決於上下遊壓差。隻有在上下遊壓差達到（dào）一定數值影響到通風係統的性能，或者是能（néng）量需求超過過濾器更換成本時，過濾器更（gèng）換才有意義。但是，過濾器必須能通過泄漏測試（如上所（suǒ）述）。事（shì）實上，很多公司並（bìng）不會使用一個過濾器超過8年。正如前（qián）述，並沒有法規規定這樣的值，這都隻（zhī）是根據經驗得來的。

靈潔高效過濾器更換問（wèn）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（bì）須定期（qī）更換（huàn）嗎？如不定期更換，隻在空調驗證時（shí）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（gāo）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（gāo）效過濾器最長使用周期，故還是應該有定（dìng）期的概念。同（tóng）時必須定期進行過濾器完整（zhěng）性測試。

製藥廠高效過（guò）濾器一（yī）般多久更換？

潔淨區A級高效過濾器（qì）檢漏

谘詢內容：潔淨區A級高效過（guò）濾器檢漏是否可以（yǐ）使用 塵埃粒子（zǐ）計數器 掃描（miáo）檢（jiǎn）漏，如果（guǒ）可以，那麽判（pàn）斷無泄漏的標準是多少。

CFDA審核查驗中（zhōng）心（xīn）回複：靈（líng）潔高效過濾器檢漏一（yī）般在非關鍵區域可以（yǐ）使用塵埃粒子計數器，但A級潔淨區高效過濾（lǜ）器（qì）不（bú）推薦使用塵埃（āi）粒子（zǐ）計數器掃描檢漏