BFCP/BFEZ shut ventilation is one type of pneumatic conveying system feeding equipment.

With continuous or intermittent forced feeding of material in a state under positive pressure of the transporting pipe by air flow off features: can be used in flour, bran chaff, starch, grain, feed, sugar, chemical products, plastic powder materials of positive pressure pneumatic conveying system for feeder. Adhesive material unfavorable use, BFCP for side: set the channel in the lower left and right sides of the housing, and pipelines are linked together, casing axial discharge groove, the lower set U material only from the side walk, BFCZ for vertical: left and right sides of the bearing seat without channel, chassis bottom discharging mouth and upper inlet, same material from the bottom row to the acceleration of connecting duct room was sent away.