... Save power, air drive Dense Phase Pneumatic Conveying System/ Pneumatic Conveying System Selection and Application of Storehouse(cone)Pump// fluidizing ... while Pneumatic sealing valve, close calve and exhaust valve open, so ensure the material into the storehouse pump smoothly ... exhaust valve closed, sealing valve, closed valve, vent valve open, after the pressure in storehouse reach a certant extent, ...