●Low initial resistance;
●Can be repeatedly cleaned, repeated use, not easy deformation;
●Large filtration area;
●Economical and practical.。
●Clean the system of clean room and air-conditioning of fresh air, pre-filtrate air, new vent, etc. 
●Central air-conditioning system primary filtration, air-conditioning purification equipment fresh air vent pre-filtration;
●Pre-filter of medium effect filter;
●Do the first level filtering in all filter systems.
●Filter material: PP/PA/PE, such as silk woven into the mesh;
●Support frame: galvanized iron frame, stainless steel iron frame;
●Outer frame: aluminum frame, galvanized frame, stainless steel frame;
●Features: Large ventilation, low resistance, can be cleaned and reused, can be used for a long time in the humid environment. (Recommended repeat times in 10 times)