Angle Storm Valve Cast Iron

Angle Storm Valve Cast Iron

The Angle Storm Valve Cast Iron is a critical safety device installed on a ship’s side shell, designed to prevent the backflow of seawater into the vessel through overboard discharge lines. Often referred to as a marine non-return valve or scupper valve, it automatically closes to stop seawater from entering the ship via pipes for bilge, cooling water, or scupper discharges, especially during heavy weather or when the discharge outlet is submerged.

Manufactured to stringent Japanese Industrial Standards (JIS) , specifically JIS F3060R, our storm valves are available in both 5K and 10K pressure ratings with flanges conforming to JIS B2220. This robust valve is essential for maintaining the watertight integrity of any vessel, from small workboats to large commercial ships.

Key Features & Benefits:

• ✔ Automatic Non-Return Function: The counterweighted disc automatically closes against the seat when external water pressure exceeds internal line pressure, preventing seawater ingress.

• ✔ JIS Compliant Design: Manufactured in accordance with JIS F3060R for design and JIS F7400 for testing, ensuring dimensional accuracy and reliable performance.

• ✔ Dual Pressure Ratings: Available with 5K or 10K flanges to match different piping system pressure requirements.

• ✔ Versatile Material Options: Offered in two material classes (Class S and Class B) to suit different media and cost considerations.

• ✔ Wide Application Range: Suitable for overboard discharge lines for Fresh Water, air or gas, Fuel Oil, Lubricating Oil, and Steam at temperatures not exceeding 120℃.

Technical Specifications

Material Specifications

We offer two material classes for the Angle Storm Valve, allowing you to select the optimal combination of durability and corrosion resistance for your specific application.

*(Note: A comprehensive material list for all 26 components is available upon request. Key components include Arm, Counterweight, Spindle Box, Packing Gland, Gaskets, and various bolts/nuts in materials like Brass, Steel, and Non-Asbestos.)*

Hydraulic Inspection Test Pressure

Dimension Table (JIS 5K & 10K)

Select the correct valve size for your piping system. All dimensions are in millimeters (mm) and weight in kilograms (kg).

Frequently Asked Questions (FAQs)

Q1: What is the purpose of an Angle Storm Valve on a ship?
A: An Angle Storm Valve is a vital safety fitting mounted on the ship’s hull at the outlet of overboard discharge pipes (e.g., from bilges, scuppers, cooling lines). Its primary function is to act as an automatic non-return valve. During normal operation, it allows water to drain out. However, if the outlet becomes submerged due to rough seas or ship listing, or if external wave pressure exceeds internal pressure, the valve’s counterweighted disc closes tightly, preventing seawater ingress into the vessel.

Q2: What is the difference between 5K and 10K ratings for this valve?
A: The 5K and 10K refer to the flange pressure rating according to JIS B2220 standards. A 10K valve is designed to withstand a higher working pressure (approximately 2.06 MPa body test pressure) compared to a 5K valve (1.03 MPa body test pressure). The 10K valve also has different flange dimensions (larger bolt circle diameter, more bolts for larger sizes) to accommodate the higher pressure. The choice depends on the pressure in your specific piping system.

Q3: What is the difference between Class S and Class B material options?
A: The two classes offer different internal materials to suit the application and media.

• Class S features a Stainless Steel (SCS2) disc, offering superior corrosion resistance for more aggressive media or longer life.

• Class B features a Bronze (CAC406) disc, which is a very common, cost-effective, and corrosion-resistant option for standard marine applications like water and oil.
  Both classes use a robust Cast Steel (SC480) body and a Stainless Steel (SUS403) stem for reliability.

Q4: What media can this cast iron storm valve handle?
A: This valve is suitable for a wide range of non-hazardous marine media, including Fresh Water, air or gas, Fuel Oil, Lubricating Oil, and Steam, provided the operating temperature does not exceed 120℃. It is commonly installed on bilge and ballast overboard discharge lines, as well as cooling water outlets.

Q5: How does the counterweight on the valve work?
A: The counterweight (made of lead) is attached to the arm of the valve disc. Its purpose is to provide a gentle, positive closing force. It is carefully balanced so that the valve disc remains open under normal gravity drainage or low-pressure discharge but will automatically swing closed to seat tightly when external water pressure pushes against it, preventing backflow. It also helps the disc return to its seat slowly, reducing slamming.

Q6: What are the standard sizes available for this valve?
A: We supply Angle Storm Valves in standard nominal sizes from DN50 (50mm) up to DN200 (200mm) for both 5K and 10K pressure ratings, as detailed in our dimension table. Custom sizes or configurations may be available upon special request.

Attention please: The description was copied from different cooperating manufacturers. The description may be different with the goods, please check with us when order.

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