(ex. 1000 tph x 2000 / 60 = 33333 ft3/hr) 6. nvert the desired capacity in cubic feet per hour to the equivalent capacity at a belt speed of 100 fpm. (ex. Capacity (eqiuv) = 33333 x (100 / 600 fpm) = 5555 ft3/hr 7. Find the appropriate belt width 8. Selected belt speed may require revision al, anthracite, sized 27 al, anthracite, sized 55-60