Inquiry (采购产品): blower Please quote blower for 4" inlet/outlet, vacuum blower type of fan. Pulls air off color compund and extrusion process. We only know it is about 1-2 HP, continuous duty and rate the motor explosion proof. 3 phase, 460 volt. I don't know CFM maybe you have a "ball-park" idea. **** Hidden Message ***** Chris Otto 10992 Company: Christiansson Co. E-mail: cotto@hvc.rr.com **** Hidden Message ***** cotto@hvc.rr.com