Dynamically Balanced Cooling Tower Hub is easy to handle and maintain. Parag Fans & Cooling Systems Limited manufactures Dynamically Balanced Cooling Tower Hub. Parag Fans & Cooling Systems Limited is an ISO 9001-2000 awarded company that supplies Energy efficient Axial Flow Fan, Fan Rings and Grids and Fill Hungers. Dynamically Balanced Cooling Tower Hub comes with Easy to install hot dip galvanized Double plate box type. This Hub is made to suit standard taper lock bushings or custom specified gear box output shafts. The Hubs are dynamically balanced to ISO - 1940 Grade 6.3.