On the sealing surface processed on the trunk, the MS58 rice disk, which is placed vertically in the direction of flow, provides 100 % tight sealing with its fluid return force. When the movement starts in the direction of flow in the system, the disk with the fluid pressure allows the flow by rotating on the hinge axis. It can be used in horizontal and vertical locations. MS58 FAF -branded rice products, which are made of quality rice, have high durability and impact resistance at low temperature. When the flow stops, the disc is positioned again in the flow section and sits on the sealing gasket placed on the body. It is designed to keep the pressure loss in the pipeline to a minimum level.