In the marine and industrial sectors, managing the safe discharge and backflow prevention of fluids is crucial. One key component that ensures this safety is the storm valve. At Aik Soon Hardware Pte Ltd, a trusted Singapore-based stockist and distributor of marine and industrial valves, we supply a wide range of high-quality storm valves to meet the demanding needs of shipbuilders, offshore operators, and industrial clients across Southeast Asia.

In this article, we’ll explore what a storm valve is, its applications, types, pros and cons, and why selecting the right valve is vital for system safety and reliability.

What is a Storm Valve?

A storm valve, also known as a scupper valve or non-return valve, is designed to prevent the backflow of seawater or wastewater into a vessel or system. These valves are most commonly used in the overboard discharge lines of ships and offshore installations.

They are a critical safety device that ensures one-way flow—allowing waste or bilge water to be discharged out while preventing the ingress of seawater, especially during heavy seas or when the ship is heeled.

When are Storm Valves Used?

Storm valves are primarily installed in:

• Sanitary discharge lines: Toilets, sinks, and washbasins aboard ships.

• Bilge and ballast systems: Preventing backflow during discharge operations.

• Scupper drain lines: On decks to allow rainwater drainage while blocking seawater ingress.

• Engine room overboard lines: For safe discharge of cooling or waste water.

They are essential during:

• Rough sea conditions: When waves could force seawater into drainage pipes.

• Port operations: To ensure compliance with environmental discharge regulations.

• Dry docking and inspections: Where they serve as fail-safe points in piping systems.

Types of Storm Valves

At Aik Soon Hardware, we supply several types of storm valves to suit different configurations and material requirements:

1. Straight Type Storm Valve

• Features a straight-through body.

• Common in horizontal pipeline installations.

• Compact and space-saving.

2. Angle Type Storm Valve

• Designed for 90-degree pipe connections.

• Ideal for vertical-to-horizontal flow transitions.

• Often used in deck drain and bilge discharge lines.

3. Swing Check Storm Valve

• Uses a hinged disc that swings open with flow pressure and closes under back pressure.

• Simple design and easy maintenance.

4. Spring-Loaded Storm Valve

• Comes with an integrated spring mechanism for quicker closure.

• Offers better protection against sudden pressure surges.

5. With/Without Test Cocks

• Some storm valves come with a test cock for manual checking and cleaning.

• Test cocks allow crews to inspect valve functionality during routine maintenance.

Pros and Cons of Storm Valves

✅ Advantages

• Prevents flooding: Acts as a critical barrier against seawater ingress.

• Low maintenance: Most storm valves are designed for durability and ease of service.

• Improves hygiene and safety: Especially in sewage and gray water systems.

• Variety of materials: Available in bronze, stainless steel, and cast iron to suit different environments.

❌ Disadvantages

• Can clog: Especially in sewage systems if not cleaned regularly.

• Backpressure limits: Certain types may not be effective in high-pressure systems.

• Wear and tear: Moving parts like swing discs may degrade over time without proper maintenance.

Materials and Standards

Storm valves supplied by Aik Soon Hardware conform to marine-grade standards such as:

• JIS (Japanese Industrial Standards)

• DIN (German Institute for Standardization)

• ANSI (American National Standards Institute)

Common materials include:

• Bronze or gunmetal: Corrosion-resistant for seawater use.

• Stainless steel: For aggressive or chemical environments.

• Cast iron with epoxy coating: Economical for less corrosive conditions.

Why Choose Aik Soon Hardware for Storm Valves?

With over 30 years of experience, Aik Soon Hardware Pte Ltd is a leading supplier of marine and industrial valves in Singapore. We stock a comprehensive range of storm valves ready for immediate delivery to shipyards, offshore platforms, and factories.

✅ Ready stock
✅ Competitive pricing
✅ Reliable after-sales support
✅ Technical advice and material certification

Conclusion

Storm valves are an essential safeguard in marine and industrial piping systems, preventing backflow and ensuring operational safety. Whether you are retrofitting an existing vessel or building a new system, selecting the right type of storm valve is critical to long-term reliability and compliance with safety regulations.

Contact Aik Soon Hardware Pte Ltd today to learn more about our wide range of storm valves and how we can support your marine or industrial projects.