flange cast steel closed vertical storm valve 

The principle of marine Anti Wave Valve is actually a one-way check valve. Usually, there is a tongue plate with springs inside. Storm Valve is normally closed, and the tongue can be opened through the forward fluid. When the valve is open, the tongue cannot be opened by reverse flow. Due to the limitation of valve seat, Anti Wave Valve also has requirements during installation. First of all, you cannot reverse the installation. Secondly, if the design requires vertical installation, horizontal installation is not allowed. Otherwise, due to the dead weight of the inner tongue plate, it will be inconvenient to open or close. Anti Wave Valve is used to discharge sewage or waste water, which can be automatically closed and prevent backflow of overboard water.