Centrifugal fans or blowers are designed to meet higher static pressures, larger volumes, heavy loads, dust concentrations, corrosive and erosive nature of gases which occurs in many dust control, flue gas handling, ventilation and pneumatic conveying systems. Different impellers designs – paddle, backward curve, backward inclined, radial, radial open and forward curves are available according to service conditions. All capacities are available in sisw and didw arrangements to suit the space and ventilation requirements.