the invention relates to a process for conveying damp gases by means of a conveyor device and also relates to a conveyor device for carrying out the process . the conveyor device has at least one feed pump with an oscillating reciprocating piston in a delivery chamber . in order to dry the conveyor device effectively in the region of the delivery chamber , the delivery chamber of at least one feed pump is intermittently ventilated at various intervals in time using an ventilation device while the conveyor device is in operation .