The textile condenser is used for the pneumatic conveying of fibre and textile materials with vacuum discharge. Two chambers can be identified in the rear ribbon condenser, one in depression connected to the supply ducting and one at atmospheric pressure. Between the two chambers, there is a spinning barrel. The flow of material and air enters the vacuum chamber, the material is retained in the ducting, the barrel pushes the air out through the ducting and, by rotating, it brings the material into the chamber at atmospheric pressure. Therefore – not being more retained by the air – the textile material falls from the barrel towards the exhaust. The rear ribbon condenser works in depression and must therefore be connected to the fan suction mouth.