Plug Fans - Catalog 350 - Twin City Fan & Blower

BCPL Plug FansBCPL plug fans from Twin City Fan & Blower are compactand versatile. Their versatility allows them to beused for air circulation in a variety of commercial andindustrial applications including air curtains, air heaters,ceiling, wall, and floor panel plenums, degreasers, dryers,dust collectors, evaporators, freezers, kilns, ovens,packaged air handlers, parts washers, penthouses,smoke houses, space heaters, spray booths, and otherhigh temperature applications.Plug fans are housed in the customer’s enclosure inapplications where the system plenum acts as the fanhousing. This configuration saves space since connectingductwork and motor support pedestals are generally notneeded. More space savings can be obtained by utilizingthe wheel compartment as a pressurized chamber inlieu of a fan scroll. The use of multiple discharges fromthe pressurized chamber allows for additional savings byreducing ducting requirements.BCPL plug fans feature SWSI flat-blade backwardinclined, non-overloading wheels. An airfoil wheel (modelAFPL) is available as an option. For AFPL performancerefer to the Twin City Fan Selector Program.The unit’s welded construction can withstand mostindustrial applications. The plug fan’s motor and driveare protected from high temperatures by the customer’sTypical InstallationsMounting is accomplished by providing a hole largerthan the wheel diameter through the chamber wall. Thewheel, shaft, motor, and drive assembly is then positionedto the inlet cone (mounted in opposite wall) andsecured in place. See Figure A.Another method is to provide a hole sized only forthe wheel drive shaft. The wheel is then positionedthrough the opening for the inlet cone after the driveand panel assembly has been securely mounted. SeeFigure B.Plug fans may be applied with open wheel (unhoused)or with a housing as shown in Figure C. Performancedata in this bulletin is for unhoused wheel application.For housed performance data refer to Bulletin 300.Walls must be designed to support the dynamic loadsof the fan without resonance.chamber wall or the optional insulated plug. The motorand drive are mounted to the plug panel which may bebolted or welded in place. The plug assembly may bemounted with the shaft in either the vertical or horizontalposition for maximum flexibility. An all welded housing isavailable as an option. Standard fan is suitable for bothhorizontal and vertical mounting.Packaged Air HandlerPlenum SystemOptionalHousingFigure A Figure B Figure C2Twin City Bulletin 350