Check valve KO axisymmetric

They are used for automatic shut-off of the pipeline when the direction of flow of the working medium changes. They are used as pipeline valves to prevent reverse flow of working medium in pipelines transporting gaseous or liquid working medium, including combustible and flammable, through process pipelines, pipelines of oil and gas fields and underground gas storages at operating pressure Pp not more than 105 MPa (1050 kgf/cm2) and temperature not more than plus 120°C (briefly plus 150°C), and also as pipeline valves for closing pipelines in the technological systems of surface facilities on the sea shelf, including offshore floating oil and gas production complexes (FOC), floating drilling rigs (FDR) and offshore fixed platforms (OSP).