Class 150 Cast Steel Swing Check Valve 

Check Valve refers to the Marine Valve that automatically opens and closes the valve flap according to the flow of the medium itself to prevent the backflow of the medium. Also known as check valve, one-way valve, reverse flow valve, back pressure valve. The Marine Check Valve is an automatic valve. Its main function is to prevent the backflow of the medium, prevent the reverse rotation of the pump and the drive motor, and prevent the medium from the container from being discharged.