Mariani Screwed Valves

Mariani Screwed Bronze Ball Valves are known for their high-quality construction and dependable performance across a range of industrial applications. Designed with precision, these valves feature threaded (screwed) end connections that ensure a secure, leak-tight seal between the valve and adjoining pipeline components.The threaded connection simplifies installation and removal, making these valves ideal for systems where welding is impractical or not preferred. Crafted from durable bronze, they offer excellent corrosion resistance and are well-suited for handling water, air, oil, and non-aggressive chemicals. Their compact design and easy maintenance make them a practical choice for both new installations and retrofit projects.
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Key Features

Key features and benefits.
1

Key Features

The screwed (threaded) ends are designed for easy installation without the need for welding or special tools. This allows for a secure, leak-proof seal that holds up under pressure in demanding applications.
2

Key Features

Constructed from high-quality bronze, the valve provides excellent resistance to corrosion, particularly in environments with moisture, salt, or mild chemicals. This ensures long-term durability and reduced maintenance requirements.
3

Key Features

The valve’s compact size makes it ideal for tight spaces and retrofit projects. Its robust construction supports a wide range of applications, including water, oil, air, and non-aggressive fluids.

460 Series

The Mariani 460 Series Screwed Ball Valve is a high-performance solution designed to deliver efficient and reliable flow control in industrial systems. Its full bore design allows for unrestricted flow, significantly reducing pressure drop and improving overall system performance.

Engineered for durability and dependable shutoff, this valve is suitable for use with water, steam, oil, and gas across a variety of piping applications. The robust screwed end connections offer quick and secure installation while maintaining a tight, leak-proof seal—ideal for environments where reliability is critical.

Size range: DN08 - DN100 (1/4" - 4")
Connection: Screwed
Working pressure: 400-600psi
Material: Bronze
Applications: Potable/Waste/Sea Water, Cooling Systems, Oil, Gases, Air, Desalination, Marine Applications
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470 Series

The Mariani 470 Series Screwed Ball Valve is a high-quality, reduced bore valve engineered for precise control and dependable shutoff in both industrial and commercial systems. Its reduced bore design enhances flow regulation while maintaining efficient performance with minimal pressure loss.

Ideal for a wide range of media—including water, oil, gas, and process fluids—this valve combines compact construction with robust functionality. The screwed (threaded) end connections allow for quick, secure, and leak-proof installation, making it a versatile choice for a variety of piping configurations.

Size range: DN08 - DN100 (1/4" - 4")
Connection: Screwed
Working pressure: 600psi
Material: Bronze
Applications: Potable/Waste/Sea Water, Cooling Systems, Oil, Gases, Air, Desalination, Marine Applications
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471 Series

The Mariani 471 Series Screwed Ball Valve is a robust, full-bore solution built for dependable flow control in a wide range of industrial applications. Designed with threaded end connections, it allows for quick installation and a secure, leak-tight fit within water, oil, gas, and chemical systems.

Its full-bore construction ensures uninterrupted media flow, reducing pressure drop and maximising efficiency across the pipeline. Engineered for long-term durability and consistent performance, the 471 Series is a versatile choice for demanding environments where reliability is essential.

Size range: DN08 - DN100 (1/4" - 4")
Connection: Screwed
Working pressure: 600psi
Material: Bronze
Applications: Potable/Waste/Sea Water, Cooling Systems, Oil, Gases, Air, Desalination, Marine Applications
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Frequently Asked Questions

Who is Mariani, and what do they specialise in?

Mariani is a renowned manufacturer of high-quality bronze ball valves, specifically designed for marine, shipbuilding, and offshore applications. Their valves are built for durability in harsh saltwater environments.

Why are Mariani Ball Valves ideal for the marine industry?

Mariani Ball Valves are made from marine-grade bronze, which offers superior corrosion resistance, strength, and longevity in seawater and harsh coastal environments.

What makes bronze a better choice for marine applications?

Bronze is naturally corrosion-resistant, particularly in saltwater and brackish water conditions, making it the preferred choice for marine valves, shipbuilding, and offshore platforms.

What types of connections are available for Mariani Ball Valves?

Mariani Ball Valves are available with threaded, flanged, and solder-end connections, making them versatile and easy to install in marine piping systems.

Are Mariani Ball Valves pressure-rated for marine applications?

Yes, Mariani Ball Valves are designed to handle high-pressure systems, ensuring reliability in marine fuel lines, bilge systems, and water intake/discharge applications.

Can Mariani Ball Valves be used for potable water on boats and ships?

Yes, Mariani offers WRAS-approved bronze ball valves, making them safe for use in potable water systems on ships, yachts, and offshore structures.

Are Mariani Ball Valves resistant to galvanic corrosion?

Yes, thanks to their high-quality bronze construction, Mariani Ball Valves have excellent resistance to galvanic corrosion, a common issue in marine applications where different metals interact in seawater.

Do Mariani Ball Valves meet industry standards for marine use?

Yes, Mariani Ball Valves comply with marine and offshore industry standards, including approvals from Lloyd’s Register, DNV, and other classification societies.

Can Mariani Ball Valves be used in fuel and oil lines?

Absolutely. Mariani Ball Valves are suitable for diesel, fuel oil, and other hydraulic fluids, making them ideal for engine rooms, fuel transfer systems, and marine hydraulic circuits.

Are Mariani Ball Valves suitable for automated systems?

Yes, many Mariani Ball Valves feature ISO 5211 mounting pads, allowing for easy integration with pneumatic or electric actuators for remote operation in marine systems.

Where are Mariani Ball Valves commonly used?

Mariani Ball Valves are widely used in shipbuilding, offshore oil rigs, desalination plants, cooling systems, bilge pumps, and marine fuel systems due to their durability in extreme environments.

How can I order Mariani Bronze Ball Valves?

You can browse our full range of Mariani Bronze Ball Valves on Ballvalve.co.uk, request a quote, or contact our team for expert advice on selecting the right valve for your marine application.

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Mariani Screwed Valves