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Vacuum pump

Technical specifications


C.F.M. needed for conveying material at different speed for deferent size of hose


   C.F.M. needed to reach velocity 
 Hose
diameter
 4000 ft/min 4500 ft/min 5000 ft/min 5500 ft/min 6000 ft/min 6500 ft/min 7000 ft/min 13780 ft/min
very high velocity
 
 ø2"  87 98 109 120 130 141 152 300 
 ø3" 196 221 245 270 294 318 343 676 
 ø4" 349 393 436 480 523 566 610 1202 
 ø5" 546 614 682 750 818 886 954 1879 
 
 ø6" 786 884 982 1080 1178 1276 1374 2706 
 ø8" 1396 1571 1745 1920 2094 2268 2443 4810 
 ø10" 2181 2454 2727 2999 3272 3544 3817 7515 
 ø12" 3142 3534 3927 4320 4712 5105 5497 10823 


Hose equivalent
0.196 ft² ø6" = 2 x ø4" = 4 x ø3" = 7 x ø2"
0.087 ft² ø4" = 1 x ø3" and 1 x ø2" = 3 x ø2"
0.049 ft² ø3" = 2 x ø2"
0.029 ft² ø2"


Conveying speed
The speed needed for conveying material may vary depending on many factors; density, particle size and shape, susceptibility to moisture... . The following table shows only the average speed needed for an average type of the material.

  Material  ft/min  Material  ft/min 
  alumina  5000  cotton  3800 
  oats  4500  paper cut  5000 
 
  bakelite (powder)  3800  flour, wheat  3800 
  wheat  6000  smoke (ash)  2000 
  wood (piece)  5800  cotton seed  5000 
  wood (fiber)  5500  wool  5000 
 
  wood (chips)  4500  corn  5500 
  wood (dust)  4000  barley  5800 
  sawdust (dry)  3800  pulp (dry)  4500 
  sawdust (wet)  4500  casting dust (foundry)  4500 
 
  rubber (powder)  4500  granite dust  6000 
  coal dust  4500  metal dust  4200 
  cement (powder)  7000  sand  7000 
  shaving of wood  4500  rye  6000 
 
  bark (dry)  4000  salt  6500 
  bark (wet)
  4500  sugar  6000 

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