Suav classic high efficiency lim series

Chinese classic 484 series

Forty years ago, the domestic high efficiency air filter appeared in China, its size is 484mm×484mm×220mm.

At that time, the installation module designed by the researcher was 500mm×500mm. Considering the need to reserve the position of the boom around, the section size of the filter was determined to be 484mm×484mm.

Another theory is that a British filter was surveyed at the time and its size was 484mm by 484mm

Early trade codes for the 484mm size filter were GS-01 and GB-01. Where, S stands for asbestos fiber, B for glass fiber, G for filter, 01 for frame length 484mm. The GB here has nothing to do with today's national standard.

Tuam Tshoj 630 Series

Another popular size for HEPA filters in China is 630mm×630mm×220mm. Similar to the background of the 484mm production, the researchers determined that the installation module was 650mm, minus the installation gap, resulting in 630mm. The 630mm is derived in 315mm, 945mm, and 1260mm.

Early trade codes for the 630mm filter were GS-03 and GB-03, where 03 represents 630mm of bezel length.

320mm tshwj xeeb rau Tuam Tshoj

Kev lag luam thaum ntxov ntawm 320mm × 320mm × 260mm lim yog GS-02 thiab GB-02. Qhov kev qhia tshwj xeeb no tau siv los ua ke nrog 484mm thiab 630mm, tab sis tam sim no nws tsis tshua muaj heev. Qee zaus, lub thickness ntawm lub lim yog 220mm es tsis txhob 260mm.