BSB Metric Series

Description     The BSB series is SISW centrifugal fans with high efficiency non-overloading backward curved impellers. The fans are suitable for supply or exhaust applications in commercial and industrial buildings. Sizes of this series are in accordance with AMCA standard 99-0098-76 and DIN 323 R20.   Technical Specification     ImpellerThe impeller of the BSB series has backward curved blades manufactured in cold rolled sheet steel with polyester powder coating finish. HousingFor all sizes except 1250 and above, the housing is manufactured in galvanized sheet steel with the housing fixed to the side plates in “pittsburg lock” form system. Housing for 1250 and 1400 are manufactured in mild steel finished with polyester powder coating. Fully welded steel plate housings with painted finish are available for all sizes upon request. FrameThe frame is manufactured with galvanized angular bars for type “C”. For type “T”, “X” and “U”, they are manufactured with sections of steel and finished with polyester powder coating. ShaftShafts are manufactured from C45 carbon steel using an automatic process for positioning and cutting of the keyways. All dimensional tolerances of the shaft are fully checked to ensure a precision fit and then coated with an anticorrosion varnish after assembly. BearingsBearings used are either deep groove ball bearing type with an adapter sleeve, or spherical roller bearings type sealed at both sides for different duty application. The bearings are lubricated for life and maintenance-free except for TX, XX, UX extra heavy duty bearings. If re-lubrication is necessary, it is recommended to use a lithium base grease suitable for all temperatures within the operational limits. For type P bearing, please the Ventac Technical Department for details.