die exhaust suggestions

[tolind]

I've trying to design a die exhaust system for a plastics manufacturer and I'm coming up against some walls. I've got the industrial ventilation manual and I can not find a section that describes how many CFM I should be exhausting from the area. I'm planning on using a 3X2 canopy hood to remove 1800 cfm at a capture velocity of 100 fpm anda static pressure of 1.5 "wc from a plastic extrusion machine. Can anyone help in regards to the number of CFM I'm pulling; Am I close, is there a reference I don't know about, should the equipment manufacturer provide such information.

Any comments or suggestions would be great. Thanks in advance.

 

[MikeHalloran]

No special expertise claimed here.

From what little I know of extruders, most of what you'll capture is odor, fumes and a little smoke, which are minimal for a properly functioning extruder running a stable process, but could be problematic (absent ventilation) during startup, process tuning, or when something goes wrong and the machine squirts plastic onto its heaters.



Mike Halloran
Pembroke Pines, FL, USA