Trunnion ball valve, is a new generation of high-performance ball valve, suitable for long transmission pipelines and general industrial pipelines, its strength, safety, harsh environmental resistance and so on in the design of special considerations, suitable for a variety of corrosive and non-corrosive media. It compared with the floating ball valve, working, valve front fluid pressure on the sphere force to the bearing, will not make the ball move to the seat, so the seat will not bear too much pressure, so the Trunnion ball valve torque small, small seat deformation, stable sealing performance, long service life, suitable for high pressure, large diameter. Advanced spring pre-valve seat assembly with self-tightening characteristics for upstream seal. Each valve has two seats, each direction can be sealed, so the installation has no flow limit, is bidirectional. This valve is generally installed horizontally.

Operation easy: the sphere is supported by the upper and lower bearings, which reduces friction and eliminates the excessive torque caused by the huge sealing load formed by the inlet pressure pushing the sphere and the sealing seat.

Reliable sealing performance: PTFE elastic material sealing ring is embedded in the stainless steel valve seat, there is no spring at the tail end of the metal valve seat, to ensure that the sealing ring is sufficient pretension, the valve sealing surface friction wear during use, the valve continues to ensure good sealing performance under the

 action of the spring. Fire safety structure: in order to prevent the emergence of sudden heat or fire, make the PTFE sealing ring burned, large leakage, and encourage the fire, between the sphere and seat fire sealing ring, when the sealing ring burned, under the action of spring force, the seat sealing ring quickly to the sphere, forming metal and metal seal, play a certain degree of sealing effect. The refractory test meets the API6FA and API607 standards.

Self pressure relief function: when the medium pressure of the stalled cavity in the valve rises abnormally over the pretension force of the spring, the valve seat retreats and deviates from the sphere to achieve the effect of automatic pressure relief, and the valve seat is automatically reset after pressure relief.

Trunnion ball valve Data.pdf