Marwin 5801R Reduced Port Flanged Ball Valve | Class 150 Fire Safe Valve

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Size range: 1" to 8" reduced port.
Port / body style: 2-way, split body, ASME Class 150 flanged ends.
Temperature range: -29°C to +204°C
Steam rating: 150 psi
Key standards: ASME B16.34, ASME B16.10, ASME B16.5, API 598, API 607 5th Edition.

The Marwin 5801R Series is a reduced port, split body flanged ball valve designed for dependable shut-off performance in industrial fluid and gas systems. Built for ASME Class 150 flanged service, the valve is available in carbon steel or stainless steel and combines robust construction with a practical, automation-ready design. Features include API 607 5th Edition fire testing, API 598 inspection and testing, anti-static ball and stem design, and an ISO 5211 mounting pad for actuator installation.

This series is ideal for applications where users need the simplicity and reliability of a quarter-turn ball valve, but also require the added assurance of fire-safe performance, live-loaded graphite stem packing, and a split body design that supports maintenance and long-term serviceability.

The 5801R is also a good fit for manual or automated valve packages thanks to its ISO 5211 top mounting arrangement, allowing compatibility across common actuator mounting patterns depending on valve size.

Applications

Common process applications and industrial uses include:

General fluid and gas isolation duties using a Class 150 flanged split body ball valve.
Energy supply and generation plants.
Pipeline construction and associated process lines.
Water and wastewater related flanged valve duties.
Steel works and power station applications.