Key Features
- Ductile cast iron body for high strength and impact resistance
- Vertical type design for space-saving installation
- Manual handle provides positive shut-off in emergency conditions
- Non-return (check) function prevents backflow from seawater
- Flanged connections for standard maritime piping (EN/DIN/JIS or equivalent)
- Corrosion-resistant internal trim suitable for saltwater service
- Meets IMPA 754241 ship supply classification
Technical Specifications
| Item Name | Ductile Cast Iron Storm Valve Vertical Type with Handle |
|---|---|
| IMPA Code | 754241 |
| Body Material | Ductile Cast Iron (ASTM A536 / EN-GJS-500-7) |
| Disc Material | Bronze |
| Seat Material | Integral |
| Valve Type | Vertical, non-return (storm) with lever handle |
| Connection Type | Flanged (PN10/16) |
| Nominal Size Range | DN50 – DN200 (2" – 8") |
| Operating Pressure | Up to 1.0 MPa (10 bar) |
| Operating Temperature | -10°C to 80°C |
| Media | Sea water, fresh water, ballast water |
| Standard | Designed to marine class requirements |
Frequently Asked Questions
What is the purpose of a storm valve?
A storm valve, also known as a non-return overboard valve, prevents seawater from flowing back into the ship's piping system through overboard discharges. It also provides a positive shut-off in case of valve failure or wave pressure.
Why choose a ductile cast iron storm valve?
Ductile cast iron offers higher tensile strength and impact toughness compared to grey cast iron, making it more resistant to mechanical shock and thermal stress aboard ships. It is ideal for marine applications where reliability is essential.
How is the handle used on this valve?
The handle provides manual override capability. It can be used to force the valve closed or to clear debris from the seating area if the disc is stuck. In automatic operation, the valve works as a standard non-return valve.
Is this storm valve suitable for ballast water systems?
Yes, the ductile cast iron construction and bronze trim are compatible with seawater and ballast water. The valve is designed to meet the mechanical requirements of shipboard ballast systems.
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