Abstract: The invention refers to closing and damping disks, designed to fit gas compressor valves. According to this invention, the disks are made of both one wearing layer (d) with a thickness of 0.1-0.3 mm and one layer made of an antifriction material (e). They have a centering hole (b), some slots (a) marked out by some arc-shaped walls, at least one blocking hole (c) preventing disk's rotation inside the valve, so that the disk could be used on both sides in turn, and some beams (l) of equal strength resulting from the material remaining at the end of the slots (a).