This standard lays down the most important dimensions and materials for plate valves for displacement compressors with a motor capacity of more than 100 kW to rationalize manufacturing, stock holding and installation into compressors. There are shown modes of installation to prevent the exchange of suction valves with discharge valves as well as discharge valves with suction valves or the installation of suction valves as well as discharge valves turned up a 180 degree.#,,#