Our Free Issue Mariani Ball Valve service provides customers with a cost-effective way to automate their own Mariani valves without the need to purchase new stock. Mariani is a well-established manufacturer of high-quality ball valves, trusted across industries such as oil & gas, chemical processing, marine, and power generation. By combining Mariani’s reliable valve design with our professional actuation expertise, we deliver dependable automated valve packages built around your existing equipment.

Key features and benefits of this service.

Key Features

Customers retain the proven reliability of Mariani ball valves while benefiting from tailored pneumatic or electric actuation.

Key Features

Each free issue valve is accurately aligned, fitted with the right actuator, and tested to guarantee dependable performance.

Key Features

Automating valves already in service reduces project costs, prevents downtime, and avoids the need to purchase new equipment.

To specify the right actuator and process your free issue enquiry efficiently, please have the following information ready. Items marked as essential are required for actuator sizing.

Mariani Valve part number (e.g. 461, 473, 475, 477, 479, L461) — confirms series, bore size, connection type, and body material
Maximum operating pressure in psi — required for actuator torque calculation
Maximum differential pressure across the ball at operation
Required fail-safe position — fail-open or fail-closed (spring-return) or double-acting
Control signal or supply type — instrument air pressure (bar), electrical voltage, or analogue signal (4–20 mA)
Hazardous area classification — Zone, category, and gas group if ATEX-certified actuator or accessories are required
Required certifications — NACE MR-01-75, Firesafe (BS6755 Pt2 / API 607 Rev4), or project-specific requirements

1. GET IN TOUCH AND TELL US YOUR SPEC

Let us know your valve details, actuation requirements, and any accessories needed — we’ll handle the rest.

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2. SEND US YOUR VALVE

Ship your free issue valve to our workshop, ready for assembly.

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3. WE ACTUATE AND BUILD TO SPEC

We mount the actuator, install accessories like solenoids and switchboxes, and fully test the assembly.

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4. SHIPPED BACK TO YOU — FAST

Your completed valve is dispatched for next working day delivery, ready to install straight away.

Already own a Mariani bronze ball valve? Our free issue actuation service lets you send us your existing valve — we supply, fit, and return it fully actuated, tested, and ready to install.

Get in touch

Our work..

Which Mariani Valves Can We Actuate?

461 Series — Split Body Full Bore Ball Valve (Flanged)

Two-piece split body construction for ease of maintenance and internal access. Full bore design for unrestricted flow. Body material bronze. Size range DN15 to DN200 (½" to 8"). Working pressure 350 psi. End connections flanged to PN10, PN16, or ANSI 150. Suitable for potable water, waste water, sea water, cooling systems, oil, gas, air, and desalination. Particularly well suited to marine and offshore applications.

473 Series — Reduced Bore Ball Valve (Screwed)

Compact reduced bore valve for applications where full bore is not required and installation space is limited. Body material bronze. Size range DN15 to DN100 (½" to 4"). Working pressure 350 psi. Screwed end connections to BSP or NPT. Suitable for water, oil, gas, air, and cooling systems. Quarter-turn operation with ISO 5211 mounting pad for actuator fitment.

475 Series — Split Body Full Bore Ball Valve (Flanged)

High-performance split body, full bore ball valve for demanding industrial and marine applications requiring maximum flow efficiency and minimal pressure drop. Body material bronze. Size range DN15 to DN200 (½" to 8"). Working pressure 350 psi. Flanged end connections to PN10, PN16, or ANSI 150. Suitable for potable water, sea water, cooling, oil, gas, air, and desalination duty.

477 Series — Flanged Ball Valve

Flanged bronze ball valve for general industrial and marine service. Body material bronze. Size range DN15 to DN200 (½" to 8"). Working pressure 350 psi. Flanged connections to PN10, PN16, or ANSI 150. Suitable for potable water, waste water, sea water, cooling systems, oil, gas, and air. Direct mount actuator configuration available on appropriate sizes.

479 Series — Marine Trunnion Ball Valve (Flanged)

Engineered specifically for high-performance flow control in marine and offshore environments. Trunnion-mounted ball design provides enhanced stability and reduced operating torque compared to floating ball designs, making it particularly suitable for larger bore and higher pressure marine applications.

L461 Series — 2-Piece Full Bore Screwed Ball Valve

Two-piece body, full bore screwed ball valve in B62 bronze. End connections to BSPP, BSPT, or NPT as specified. Suitable for water, gas, air, and general industrial media. Size range DN15 to DN100 (½" to 4"). Quarter-turn operation with ISO 5211 direct mount facility for compact actuator packages.

People use our Free Issue Mariani Ball Valve Service because Mariani is a respected and popular brand in the valve industry, known for producing robust and versatile ball valves. Many businesses already operate with Mariani valves, and instead of sourcing entirely new actuated valves, they can save both time and cost by sending their existing valves to us for automation.

This service ensures that customers can keep using the valves they know and trust, while gaining the benefits of automation. By pairing Mariani’s strong valve engineering with our expert actuation, customers achieve the best of both worlds—proven valve performance combined with smooth, accurate, and reliable automated operation.

Oil & Gas – Automating Mariani valves for isolation and flow control in pipelines, refineries, and offshore facilities.
Chemical & Petrochemical – Ensuring safe and reliable automation for aggressive, hazardous, and high-pressure process media.
Power Generation – Supporting cooling water, steam, and fuel handling systems with robust actuated valve solutions.

Send us your Mariani ball valves and we’ll automate them with either pneumatic or electric actuators. Our team ensures perfect mounting, alignment, and full functional testing, so your Mariani valves continue to deliver the quality you expect—enhanced with the efficiency of automation.

Explore Mariani Ball Valves

Our service allows you to send us your Mariani ball valves, which we then automate with pneumatic or electric actuators to suit your application.

It’s a cost-effective option—customers can reuse their trusted Mariani valves while still receiving a fully actuated and tested package.

Yes, we can automate most designs, including two-piece, three-piece, and flanged Mariani ball valves.

Both pneumatic and electric actuators are available, carefully matched to your process requirements.

We use engineered mounting kits, including brackets and couplings, to guarantee accurate alignment and smooth functionality.

Yes, each Free Issue Mariani package is function-tested to confirm reliability, accuracy, and performance.

Most Free Issue Mariani valve packages are completed within 5–10 working days, depending on stock and custom fittings.

Yes, provided the Mariani valves are in good condition, we can automate both new and previously used valves.

Yes, details such as size, pressure rating, and application help us select the right actuator for your valve.

Industries such as oil & gas, chemical, power generation, marine, and water treatment regularly rely on Mariani valve automation.

Automated valves reduce manual handling, improve process accuracy, and enhance operational safety.

Yes, we offer ongoing technical support, spare actuators, and replacement mounting parts to maintain long-term performance.

Please feel free to request information and advice using the form below or call us on 0151 547 1221

Free Issue Mariani Ball Valves