Engineered for Direct Burial and Zero-Leakage Performance

Our underground fully welded ball valves are specifically designed for direct burial applications, providing a permanent, leak-proof seal for critical underground pipelines where maximum integrity, long-term reliability, and zero external leakage are non-negotiable requirements. Unlike traditional flanged valves that require above-ground valve chambers, these valves can be buried directly underground, eliminating the need for large manholes and reducing construction costs while ensuring reliable protection of the entire system.

Advanced Fully Welded Construction for Maximum Integrity

The valve body features a fully welded construction where all body sections are joined via full-penetration circumferential welds, creating a monolithic structure that eliminates all gasketed connections and body flanges. This welded design provides a pressure boundary that is as strong as—or stronger than—the pipeline itself, completely eliminating potential external leak paths. The extended bonnet design positions the stem packing and actuator away from the process fluid, ensuring reliable operation even in extreme temperature conditions.

Designed for Easy Operation and Maintenance-Free Service

These valves are equipped with extended stems that allow operators to control the valve from ground level using a T-handle, eliminating the need to enter underground valve chambers and avoiding suffocation risks. The compact design reduces construction space requirements and installation costs significantly. With a fully welded body and no external leakage points, these valves offer maintenance-free operation for over 15 years under normal conditions, making them ideal for long-term buried applications.

Built for Critical Underground Applications

Underground fully welded ball valves are the industry standard for natural gas transmission and distribution pipelines, city gas networks, district heating systems, and water supply mains. They are also widely used in chemical processing plants, oil refineries, and pulp and paper production facilities. Available in sizes from 1/2 inches to 48 inches (DN15-DN1200) and pressure ratings from Class 150 to 2500 LB (PN10-PN420), these valves can handle a wide range of media including natural gas, water, oil, and various chemicals.

Delivering Unmatched Safety and Environmental Protection

The fully welded design ensures no potential body joint leaks, providing superior environmental protection for buried applications. The anti-blowout stem design, fire-safe construction, and anti-static devices provide comprehensive safety protection. With corrosion-resistant materials and optional extended bonnets and stems, these valves are built to withstand harsh underground environments, ensuring reliable performance for decades of service.