Compressor valve

(57) The inhalation valve or blowdown valve of a summary compressor is equipped with a valve seat board (10) and a protection plate (12). A valve seat board (10) carries out two or more owners of the cluster (66, 68) of the hole (16) extended through a valve seat board (10), The hole (16) of each cluster (66, 68) is 連通 (ed) with each valve seat side (72, 74) which it is arranged along with each circular locus, and is carrying out the opening through the inside (70) of a valve seat board (10). A protection plate (12) defines each stop side (89) for which the interval was able to be vacated from the valve seat side (72, 74). Each annular seal ring (20) goes back and forth between each stop side (89) and each valve seat side (72, 74) which faced each other. Engaging of clutch of two or more springs (22) is carried out to one of the seal rings (20) of each がそれぞれ, a seal ring (20) is turned to the valve seat side (72, 74), and they force it.