The adjustable air valve (1) has a closure (7) which is relatively adjustable with respect to insert (4) such that different large flow cross sections (15) are formed between the air opening of insert and the closure. The closure is rotatably mounted relat...

The round air nozzle has an inner ring (12) in which lamellas for controlling the airflow are mounted and that is rotatably mounted in a round bearing housing. A clamping element (22,24) supported in the bearing housing (14) penetrates through the bearing ...