Belt Drive Tubeaxial In-line Duct Fan

In-line Duct Fan Series


Model Features

  • Rated up to 75,490 CFM in static pressure applications up to 1-1/2" w.g.
  • 12 sizes ranging from 12 to 60" propeller diameters
  • Motor and drives are located outside of the airstream
  • Belt drives permit easy performance adjustments when needed
  • Continuously welded and epoxy painted steel housing
  • For indoor use only
  • AMCA Air and Sound Licensed
  • cULus Listed

AMCA Air and Sound Licensed   cULus Listed

Model Overview

The Tubeaxial line offers the widest range of sizes, horsepower and performance in the industry. TDB's are high capacity belt drive tubeaxial fans rated from 900 to 75,490 CFM, with static pressure capability up to 1-1/2". They are used to exhaust air from or supply air to commercial and industrial applications, such as, general building ventilation, enclosed garages, paint spray booths, heat and smoke ventilation systems and other applications where air is moved through a duct system against moderate static pressure.

Belt drive TDB's are especially suited to handle fumes, vapors, steam, dust, smoke and contaminated or heated air to 200°F. They are available in larger, higher capacity sizes and offer ease in adjustment of fan performance by reducing the fan RPM with adjustable motor sheaves (Optional on 7-1/2" HP and larger). Total access to the bearings and shaft is possible with the TDB's unique removable cover.

2-year fan housing warranty, 1-year motor warranty

Size CFM Range Max SP
12 914 to 2124 1/2"
16 1168 to 3562 1-1/4"
18 1809 to 2075 1"
20 2692 to 6727 1-1/8"
24 3485 to 10579 1"
30 4239 to 17497 1-1/8"
34 5118 to 23827 1-1/2"
36 5878 to 25097 1-1/2"
42 7231 to 32346 1-1/2"
48 10161 to 38879 1-1/4"
54 18049 to 58253 1-1/4"
60 26748 to 75490 1-1/8"
TDB Mounting Options

Note: Additional accessories are available for certain products. Contact your S&P Representative for more information about these accessories.

Motor Cover  
Belt Guard  
Hanging and Floor Brackets  
Companion Flange (Inlet/Outlet)  
Inlet/Outlet Guard  
Mounting Rails  
Rubber Isolator (Floor)  
Rubber Isolator (Hanging)  
Spring Isolator (Floor)  
Spring Isolator (Hanging)  
Inspection Door  
Disconnect Switch  
Shaft Seal  
TDB Catalogue Pages   Download
TDB Product Submittal   Download
TDB Product IOM   Download
TDB Mounting Arrangements   Download
  • General / Clean Air
  • Contaminated Air
  • Spark Resistant