industrial exhaust velocity
industrial exhaust velocity
(OP)
I'm finding conflicting information and I would like some varied input. For industrial exhaust what is an acceptable duct velocity. I understand the capture velocity but sizing the ductwork is where my trouble lies. I've hear a max of 2500 fpm all the way to 5000 fpm. I don't want to much noise or vibration.
Thanks
Thanks





RE: industrial exhaust velocity
Recommended velocity: Rect main 3000 FPM, Round Main 4000 FPM, Rect branch 2500 FPM, round branch 3000 FPM
Maximum velocity: Rect main 3500 FPM, Round Main 6500 FPM, Rect branch 3000 FPM, round branch 4000 FPM
RE: industrial exhaust velocity
SMACNA also has a lot of information on air velocities.
2500 fpm is really very high for HVAC applications, but about right for grease cooking hoods.
5000 fpm will be right if you are carrying wheat products and etc. other solids.
You don't say what you are doing with the ductwork and its function is critical to establishing velocity.
RE: industrial exhaust velocity
Dust extraction systems do generate noise and is unavodable.
The fittings for duct extraction systems are different from the one you use for HVAC.If you have not done it before,leave it to some one who has done it before.
RE: industrial exhaust velocity
All the solutions are within the book that willard3 posted about.
RE: industrial exhaust velocity
The highest they list is 7000 fpm for cement dust and sand.
http://nrmurphy.com/fans_air.html
RE: industrial exhaust velocity
I fear the book may be hard to come by.....I have one.