BEL Valves Delivers High-Temperature Expanding Gate Valves

BEL Valves has supplied six 600°F expanding gate valves to one of the US Gulf's busiest offshore production platforms. The scope included three 8 inch Class 300 and three 12 inch Class 300 expanding gate valves, specified to operate reliably at temperatures up to 600°F (315°C). These high-temperature valves provide positive isolation, allowing steam lines to be safely deactivated and depressurised for maintenance activities.

Located approximately 150 miles south-east of New Orleans in around 6,050 ft of water, the host facility is a large semi-submersible production and drilling rig. Built to process up to 250,000 bpd of oil and 200 million ft³/d of natural gas, the integrated drilling unit accommodates production, utilities and living quarters for more than 300 personnel across a main deck footprint of approximately 163,000 ft².

BEL Valves' engineering team analysed the thermal expansion characteristics of pressure-containing components and internal parts at 600°F. By carefully controlling clearances, seat loading and stem thrust through material selection and precision machining, the design ensures the correct amount of friction between moving components to prevent galling while maintaining low operating effort.

To validate performance under these conditions, BEL Valves incorporated enhanced factory acceptance testing with additional high-temperature verification. Alongside standard dimensional and pressure inspections, the valves were fully type tested at 600°F (315°C) at the company's North East England facility. Testing at operating temperature enables verification of real-world performance, allowing clearances, seat loading, packing response and operating torque to be confirmed after the valve has completed a thermal stabilisation cycle.

While Class 300 pressure ratings and common valve sizes may appear standard, the combination of offshore operating conditions, high-temperature steam service and expanding gate valve design creates a far more demanding engineering challenge.

Part of the British Engines Group and headquartered in Newcastle upon Tyne, BEL Valves specialises in engineered valve solutions for critical service applications.

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