Cast Bronze Check Valve

KOSEN Forged Pressure Seal Swing Check Valves is a valve which is automatically opened and closed by the flow of the medium itself. It is used to prevent the reverse flow of the medium. It is also called the reverse check valve, the one-way valve, the countercurrent valve and the back pressure valve. The check valve is an automatic valve. Its main function is to prevent the backflow of the medium, prevent the reversing of the pump and drive motor, and the discharge of the container medium. The check valve can also be used to supply pipelines where the pressure may exceed the system pressure. Disc check valve around the pin inside the valve seat. The disc check valve is simple in structure and can only be installed on horizontal pipes with good tightness.

KOSEN DIN Lift Check Valves is used to prevent back flow in the line .Flow is in a straight line through the valve resulting in minimal pressure drop . The disc swings into the open position as the media flows through the line .Back pressure in the line holds the disc in the closed position .
KOSEN DIN Lift Check Valves may be installed in horizontal or vertical lines ,but must be installed in proper relation to the media flow as indicated by the flow direction arrow marked on the body .

The product is composed of valve body, guide body, axial movement valve disc and spring component. The product can effectively prevent the reflux of the medium. Ensure the safety of the pipeline. The valve body, disc and tail are designed as streamlined passageways with good fluid performance, minimizing flow resistance and pressure. Using high performance spring material HT/INCONELX-750, it has excellent corrosion resistance, antioxidant and excellent mechanical properties, and ensures the running state of the spring under the long working condition. Mute operation eliminates noise and water hammer in valve piping to ensure safety of equipment and piping. The opening and closing reaction is fast, and the high reliable preload spring enables the disc to respond quickly to the change of fluid pressure. Compact structure, convenient installation, vertical and horizontal installation. The valve is made of alloy steel overlaying welding cover, wear-resistant, corrosion resistant and long life.

The valve disc of the swing check valve is disc shaped and rotating around the seat channel. Because the valve channel is streamlined, the flow resistance is smaller than the lift check valve. It is suitable for a large aperture with low flow velocity and unchangeable flow, but it is not suitable for pulsating flow, and its sealing performance is less than the lifting type. The swing check valve is divided into three types, single valve, double valve and multi half. These three forms are divided mainly according to the valve diameter. The purpose is to prevent the hydraulic shock from stopping the flow or reverse flow of the medium.