Check valves are installed in pipelines and are used to protect them from the reverse flow of the transported medium, ensuring the passage only in a given direction and automatically shutting off the flow in case of a reverse flow. Are applied on pipelines of hot and cold water supply, heating, compressed air, and liquids which are not aggressive to materials of the valve. Nominal pressure - 10 bar. The direction of flow is indicated by an arrow on the body. This check valve can be mounted in any position.