TM 5-3895-374-24-2 1.1.  APPLICATION Meyer Rotary Airlock/Feeders are used in pneumatic conveying systems, dust control equipment and as volumetric feeders to maintain an even flow of material through processing systems. The  basic  use  of  the  Roto-Flo  is  as  an  airlock  transition  point,  sealing pressurized systems against loss of air or gas while maintaining a flow of material between components with different pressure.  Roto-Fio units are also  widely  used  as  volumetric  feeders  for  metering  materials  at  precise flow   rates   from   bins,   hoppers   or   silos   into   conveying   or   processing systems. Roto-Flo    Rotary    Airlock/Feeders    have    wide    application    in    industry wherever dry free-flowing powders, granules, crystals or pellets are used. Typical  materials  handled  with  Roto-Flo  units  include:    cement,  sugar, minerals,  grains,  plastics,  dust,  fly  ash,  flour,  gypsum,  lime,  coffee  and cereals etc 1.2.  OPERATIONAL SPECIFICATIONS CAPACITIES IN CUBIC FEET PER MINUTE (Based on 6 vane open end rotor and 100% fill factor) 6V 8V REVOLUTIONS PER MINUTE SIZE CFR CFR 10 15 20 25 30 40 50 4x4 02 - .20 .30 40 50 60 80 1 00 6x6 07 065 .70 1.05 1 40 1 75 210 2.80 3.50 8 x 8 18 .1’7_ 1.80 2.70 3.60 450 540 7.20 9.00 10 x 10 36 .34 3.60 5.40 7.20 9.00 10.80 14.40 12 x 12 64 .61 6.40 9.60 12.80 16.00 19.20 12 x 21 1 08 1.03 10.80 16.20 21.60 27.00 32.40 14 14 . .105 1.01 10.50 15.75 21.00 26.25 31. 50 16x16 1.62 155 16.20 24.30 32.40 40.50 18 18 . 2.29 2.20 2.290 34.35 4580 57.25 22x22 4.34 4.20 434.0 65.00 86.80 30X30 1130 11 12 113.00 16950 226.00 A closed end rotor will deliver about 10% less displacement in cu/ft.  per revolution. page 3 - 726