Profile: HERM International Trade (Weifang) Co. , Ltd specializes in providing cooling equipment (pressure fan, & cooling water curtain), heating equipment (coal-fired hot blast stove, electric heater), environmental control system, greenhouse control system, industrial and aquaculture water treatment equipment. Push & pull fan is mainly made up of blade, centrifugal opening device, motor, outer,frame, protecting nets, supporting frames, and shutters. It is made based on aerodynamic, effectively reduce the wind resistance. The major parts are made of galvanized steel sheets and stainless steel sheets.