Often made of man-made fiber filter, the frame is made of a sturdy, moisture-proof cardboard frame. Will not deform, rupture, under normal operating conditions
Initial effect paper frame filter distortion. In addition, the filter material is fixed diagonally before and after the frame. The filter material and the outer frame are tightly bonded to the outer frame to prevent air leakage.
The primary filter is mainly used for primary filtration of air conditioning and ventilation systems, clean room return air filtration, and pre-filtration of local high-efficiency filtration devices. It is mainly used to filter dust particles with particle size of 5μm and above, and is tested by weight method. Also used for primary protection of multi-stage filtration systems. The filter material includes non-woven fabric, nylon mesh, aluminum mesh, stainless steel mesh, etc., and the non-woven filter material is subjected to finishing treatment to prevent secondary pollution caused by breakage of the non-woven fiber.