Chengdu Hengfeng Evergreen Technology Co., Ltd. is an experienced air filter manufacturer who supplies filters for biological and industrial clean rooms. We constructed our own production plant with full facilities and workers based in mainland China. We own a group of professional teams from R&D, production, quality control, customer service and sales & shipping departments. We are specialized in various air filters and main products include panel filters, bag filters & HEPA filters, dust filters, dust bags, gas/liquid filters and whole sets of clean equipment which are widely...