TDB Belt Drive Tubeaxial In-line Duct Fan

Tubeaxial Fan Series

TDB Model

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 cULus

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 the 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 2,124 1/2"
16 1,168 to 3,562 1-1/4"
18 1,809 to 2,075 1"
20 2,692 to 6,727 1-1/8"
24 3,485 to 10,579 1"
30 4,239 to 17,497 1-1/8"
34 5,118 to 23,827 1-1/2"
36 5,878 to 25,097 1-1/2"
42 7,231 to 32,346 1-1/2"
48 10,161 to 38,879 1-1/4"
54 18,049 to 58,253 1-1/4"
60 26,748 to 75,490 1-1/8"
Dimensional Drawing for the TDB Model

Dimensional data is displayed in inches.

Size A B C D E B.C.D.
12 12-3/8 14-1/2 12 - 21 13-1/2
16 16-3/8 18-1/2 17 - 23 17-3/8
18 18-3/8 22-1/2 22 17-15/16 25-1/2 19-3/4
20 20-3/8 24-1/2 22 18-3/8 26-1/2 21-3/4
24 24-3/8 28-9/16 23 21-1/4 28-1/2 25-3/4
30 30-3/8 34-9/16 24 25-1/2 35 32
34 34-3/8 38-9/16 27 28-5/8 37 36-3/8
36 36-3/8 40-5/8 29 29-13/16 38 38
42 42-1/2 47 30 34-1/8 42 44-1/4
48 48-1/2 53 33 38-3/8 45 50-3/4
54 55 59-1/2 38 43 48 57-1/4
60 61 65-1/2 40 47-1/4 54-1/2 63-1/4

Highlighted cells indicate that the motor may extend past unit size.

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

Standard Accessories

Motor Cover  
Belt Guard  
Hanging and Floor Brackets  
Companion Flange (Inlet/Outlet)  
Inlet Guard  
Outlet Guard  
Mounting Rails  
Rubber Isolator  
Spring Isolator  
Inspection Door  
Disconnect Switches  
Shaft Seal  

General Catalog Section
Submittal Download
Instruction and Operation Manual Download
Mounting Diagram

  • General/Clean Air
  • Contaminated Air
  • Spark Resistant