China Suppliers Factory Fully Welded Buried Trunnion Ball Valve with Extended Stem for Safe Operation

A fully welded body eliminates all bolted or flanged joints, which are common points of leakage and mechanical weakness. This makes the valve highly resistant to soil movement and pipeline stress, ensuring long-term, maintenance-free underground operation with zero external leakage risk.

Trunnion-mounted balls are mechanically anchored at both the top and bottom, which reduces the operating torque required to open or close the valve. This design distributes the pipeline pressure load more evenly, extending seat life and making it the preferred choice for large-diameter, high-pressure systems.

The extended stem brings the valve's operating interface up to ground level, so operators can open or close the valve without excavating the ground above it. This significantly reduces maintenance costs and improves operational safety, especially in deep-buried pipeline environments.

Yes. While the standard configuration includes a manual gear operator for smooth and efficient torque transmission, the valve can also be fitted with optional electric or pneumatic actuators. This makes it suitable for remote-controlled or automated pipeline systems where manual operation is not practical.

Extended pipe ends serve multiple purposes: they ensure accurate alignment with the existing pipeline, reduce residual welding stress near the valve body, and provide convenient lifting points for transport and field installation. This simplifies logistics and helps ensure a reliable, leak-free weld joint in the field.

Seat material selection depends on the type of media being transported, operating temperature range, and system pressure. For example, PTFE and RPTFE are widely used for general chemical and gas applications, while PEEK and PCTFE offer superior performance at elevated temperatures or in highly aggressive media. Our engineering team can assist in specifying the optimal material for your specific conditions.