What are trunnion ball valve features?

Trunnion ball valve is a new generation of high-performance ball valve, widely used in long-distance pipelines and general industrial pipelines. The trunnion type is a newly developed product that integrates domestic and foreign technologies. It is suitable for various corrosive and non-corrosive media and has excellent sealing performance within a wide range of temperature and pressure changes. Compared with the floating ball valve, the trunnion ball valve transfers all the forces generated by the medium pressure in the pipeline to the upper and lower bearings, without producing any relative movement of the ball, and the valve seat has sufficient pre-tightening force provided by the spring to ensure valve sealing. Therefore, the sealing surfaces at both ends of the trunnion ball valve are evenly stressed, and it has low operating torque, reliable sealing performance, long service life, and is particularly suitable for high temperature, high pressure, large diameter, media mixtures with few particles, and other applications.

Application range: food, pharmaceuticals, petroleum, chemical industry, natural gas, steel, military facilities, paper, environmental protection, and other industries.

Structural features of the product:

• Easy operation: the ball is supported by upper and lower bearings, reducing friction and eliminating the large sealing load caused by the pressure pushing the ball against the sealing seat, resulting in smaller torque even at the highest operating pressure.
• Reliable sealing performance: the metal seat is equipped with a spring at the tail end to ensure sufficient pre-tightening force. When the sealing surface of the valve is worn during use, the valve continues to maintain excellent sealing performance under the action of the spring.
• Resistant to sulfide stress cracking: the materials in contact with the medium are selected according to the standards of NACE MR0175 set by the American Society of Corrosion Engineers, and strict quality control and testing are conducted during the manufacturing process to meet the requirements of sulfide environment conditions.

Exhaust line: drain holes are provided at the top and bottom of the valve body, which can be used to check for seat leakage. During operation, when the valve is fully open or fully closed, the intermediate chamber pressure can be relieved, and the packing can be directly replaced. It can also discharge any residue in the intermediate chamber, reducing contamination of the valve by the medium.