These arrangements have the impellor directly mounted onto the motor shaft. The motor sits on on adjustable platform. The casing is flanged at both ends and they are produced by spin forming from 1 piece of metal.
These casings are usually employed in the middle of ducting runs. The impellor and motor are completely contained within the length of the casing. They can be supplied with optional inlet bellmouths and guards.
Ancillaries such as spigot flanges, inlet bellmouths, casing feet and flexible connections are also available. RHF can offer non standard arrangements/special fans.