METHOD AND DEVICE FOR AUTOMATIC CONTROL OVER INSTALLATION OF PNEUMATIC TRANSPORTATION OF LOOSE MATERIAL Russian patent published in 1995 - IPC

FIELD: pneumatic transport. SUBSTANCE: switching over of lock chambers of three-chamber feeder is conducted on adherence to condition when ratio of pressure difference between first lock chamber and main-line chamber, of pressure in first lock chamber and pressure in second lock chamber to value of pressure in gas-feeding main pipe-line amounts correspondingly to K₁, K₂ and K₃ when 0,2<K₁<0,6<K₂<0,9 and K₁<K₃<1. EFFECT: enhanced efficiency of transportation of loose materials. 2 cl, 4 dwg