Storm valve is a flap type non-return valve which is used to discharge the sewage overboard. It is connected to the soil pipe at one end and other end is at ships side so that sewage gets overboard. So it can be overhauled only during drydocks . Inside the valve flap is there which is attached to a counter weight, and a locking block. Once flow begins, the operator must choose whether to open the locking block, or keep it closed.
| Model | NA-200 Series |
|---|---|
| Design Standards | JIS (F7305 / F7347 / F7307), DIN, or ANSI standards |
| Trim/Seat Material | Bronze / Brass / Stainless Steel |
| Body Material | Cast Steel (SC480), Bronze (BC6), Ductile Iron (FCD) |
| Pressure Ratings | JIS 5K, JIS 10K, PN10, PN16 |
| Disc | Stainless Steel, Bronze |
| Stem | Stainless Steel, Brass |
| Application | Industrial Valves |