Damper actuator torque

[skuntz]

How can I calculate the maximum torque required for a damper actuator? Or to put it another way, how do I calculate expected torque for my airflow in a circular duct?

 

[ChasBean1]

Skuntz, Belimo has some good info on this - file is a bit large but pretty informative:

http://www.belimo.us/bellib/Damper_Actuators/DampAct&Acc.pdf

See page 6 for starters... gives in-lb torque versus pressure across the damper.

 

[macmet]

In the past I've used vendor information to find our values.

I do not have access to my notes right now, so I cannot say which vendors for certain would provide how to calculate this, but I would suggest googling "Ruskin" and "Greenheck".

May even try calling them for technical support.

cheers.