They have the same parameters as fan stacks, but are designed for operation in forced draft systems (air-cooled condensers). By default, they can be delivered with protection grid attached to the lower flange of inlet.
Design, shape and geometrical dimensions of new fan casings are optimized during design stage in order to secure the highest endurance parameters. The influence of impeller blades on fan ring’s wall is analyzed. On that basis, appropriate technology is being developed – it prevents from the vibrations during the operation of fan.