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a IL B & J AIR HANDLING SYSTEM GENERAL INFORMATION Through the development of the B & J Pollution Control System, it was necessary to determine the present-day adequacy of air handling systems used in the retreading industry. For many years, this equipment has not been properly sized to sufficiently handle the material being removed by existing buffing equipment. As a result of .B & J research, it was determined that an absolute, minimum air movement of 2000 CFM in volume and 6000 FPM in line velocity would be required. These minimum requirements not only improve the efficiency in the handling of the material during the buffing process, but also assure a greater degree of efficiency from the B & J Pollution Control System. Proper air movement provides for more efficient dust pick-up while at the same time insuring that any excess water is dried or evaporated. Thus, when the rubber particals are deposited from the cyclone into the hopper, they are in a cool and safe condition. This also allows for the pollution control system to be set at optimum operating efficiency, whereby the proper amount of water can be applied to the rasp to more adequately neutralize the friction factor which previously created smoke. Without proper air movement, it is necessary to limit the amount of water applied to the rasp, not allowing neutralization of the friction factor to the fullest extent, thus eliminating only 50�o to 7550 of the smoke. It is necessary to do this as, without proper air movement, there would be excess water within the rasp hood, duct system, and around the buffer. The blowers on the buffers are more of a hindrance than a help as they prevent continuous flow of material from the rasp hood to the dust collector. Greater efficiency is obtained by having adequate blower capacity at the cyclone, allowing material to pass through the duct system freely without going through any obstructions such as in - line blowers, etc. For this reason, B & J recommends the removal of these blowers from the rear of the hoods and the use of a B & J Air Handling System. Proper air handling specifications for 1., 2-, and 3-buffer installations are supplied in the following pages. I #HO/014-82