The medium-efficiency bag-type filter mainly filtrates dust particles over 5um. It has the features of large filtration are, high dust capacity, low resistance, and is widely used for industrial purification and ventilation systems of central air-conditioners in pharmacy, hospitals, electronics and food industries, etc. It also can be used as initial filtration of HEPA filters to reduce its load. The suggested replacing cycle is 3 months.

Adopting new compound non-woven, glass and synthetic fibre as filter material, bag type, with sorts of metal frames(galvanized, aluminum and aluminum alloy sections).

The bag-type air filter is very essential to common ventilation and air-conditioning systems, it's called the main force of filters. The bag structure and can meet the needs of large air flow and low resistance. Strictly speaking, in the front of the bag type filters, a pre-filtering device is usually needed, always using the disposable paper-frame or metal-frame filters. However, some users won't replace the paper filter when its useful life has come to an end, which means letting the bag filter be the first step filtration, causing the filter's service life being shortened greatly. Here we highly recommend the users avoiding this condition. Though seemingly adding one more filter lifted the cost, but relatively the filter's life becomes longer. As the replacing cycle is extended, the total cost has been definitely saved.