Abstract: A device for mixing fluid, and powdered, flowable materials, particularly for mixing automotive refinish coatings for use with spray guns, having a first component (3) mounted rotatably on a frame (2), having a second component bearing or forming a mixing product receptacle (4) mounted rotatably on the first component (3) and having at least one drive device for a rotary drive of the first component (3) and a rotary drive of the mixing product receptacle (4), whereby the drive device is preferably designed in such a way that the direction of rotation of the first component (3) is opposed to the direction of rotation of the mixing product receptacle (4). According to the invention the ratio of rotation between the rotational speed of the first component (3) and the rotational speed of the mixing product receptacle (4) being approximately 1:1.1 to 1:2.0, preferably 1:1.3 to 1:1.8, whereby a preferable rotational speed of the first component (3) is approximately 200 to 400 r/min, preferably 250 to 350 r/min.

Abstract: In a piezoelectrically actuated fluid valve the bending transducer includes another bearing point at its second end remote from the immovable bearing and the valve closure member points to the valve seat in a defined partial span width between the two ends of the bending transducer.