Kizi specializes in the design and manufacture of Trunnion Ball Valves, engineered for high-pressure and large-diameter pipeline applications across industries such as oil & gas, chemical processing, water treatment, and power generation. These valves are designed with a floating valve seat and upper/lower shaft bearings, which allow the valve to maintain excellent sealing performance while minimizing operating torque. By transferring the fluid pressure force to the bearings rather than the valve seat, Trunnion Ball Valves reduce seat deformation, improve sealing stability, and extend service life, ensuring reliable operation even under extreme conditions.
Our Trunnion Ball Valves are available in two-piece and three-piece body designs, with flanged connections and advanced sealing materials such as RPTFE, PPL, PEEK, and metal-reinforced seats. Each valve incorporates spring-loaded pre-seats for self-tightening upstream sealing and features bi-directional sealing, fire-safe structures, and automatic pressure relief functions. This allows the valves to operate safely under high temperatures or abnormal pressures without compromising performance.
We strictly control raw material sourcing, using high-quality stainless steel and special alloys, and perform comprehensive inspections including dimensional checks, pressure tests, and sealing performance evaluations. Combined with modern CNC machining, precision casting, and full-process quality control, our Trunnion Ball Valves provide durable, low-maintenance solutions suitable for demanding industrial environments. Customers benefit from robust performance, long-term reliability, and flexible design options, making these valves ideal for projects requiring high precision, safety, and operational efficiency.
