Buried Type Ball Valve

Buried Type Fully-Welded Ball Valve (Extended Stem, Butt-Weld Ends)

This buried-type ball valve is designed for underground installation in long-distance oil, gas, and water pipelines. The one-piece fully-welded body eliminates external leak paths and forms an integral connection with the pipeline through butt-weld ends. An extended stem column raises the operator above grade, allowing manual operation from ground level without excavation. The entire valve body and stem column are buried directly in the trench, with only the handwheel accessible at the surface.

The trunnion-mounted ball design provides reliable shut-off under high line pressure. The welded body is stress-relieved and coated externally for corrosion resistance in buried service. The extended stem maintains accurate stem alignment and smooth operation over long stem lengths. A protective shroud around the stem and body weldments prevents soil ingress and mechanical damage.

The valve is ideal for trunk pipelines, distribution networks, and underground vaults where accessibility is limited and the valve must remain buried for decades. Standard features include cavity pressure relief, anti-static device, fire-safe seat design, and sealed stem packing. Electric, pneumatic, or hydraulic actuators can be fitted at the top of the extension stem for remote operation.

Available in butt-weld ends per ASME B16.25, sizes NPS 2 through 48 (DN50-DN1200), pressure Class 150 through 900 (PN16-PN160). Body materials include LCC, WCB, and CF8. Designed to API 6D and ASME B16.34.

Product packaging

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