Tunnel Shutters®

Tunnel Air Technology For the 21st Century

We selected only one machine to operate our Tunnel Shutters®.  The di Drive is the most powerful and reliable Gear drive in its market!


• Powerful 
Pulls 2200 lbs x Speed 2.25 ft/min = Power 5000 ft lbs/min

• Heavy Duty Construction = Long Life
Heavy Duty Gears - Shafts - Bearings - Motor (1/3 hp)
Manufactured to Industrial Standards

• Simple Accurate Limit Switches
Smooth sliding adjustment pins on friction plates

• Internal Manual Open/Close Switches
For ease of setting limit switches - no extra power lead required

• Safety Switch
Internal safety switch - prevents overriding of the limit switches

• Printed Circuit Board
PCB circuitry instead of hand wired circuits - for greater reliability

• Totally Sealed and Lubricated for Life
No regular maintenance required

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Our Tunnel Shutters® are torque tube driven for a smooth, maintenance free operation.  There are no pulleys needed and it is simple and far less time consuming to install compared to both Curtains and Doors.     Rack and Pinion Drive Video!




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Manual Backup System

If your Poultry House has a loss of electrical power, the di Drive is equipped with a 3/8 inch manual drive connection.
The Tunnel Shutters® can be easily opened or closed in no time with a regular hand held drill.

di Drive System