Trunnion mounted ball valve, a new generation of high-performance
ball valve, is suitable for long-distance pipelines and general industrial pipelines. Its strength, safety and resistance to harsh environment have been specially considered in the design, and it is used for various corrosive and non-corrosive media. Compared with a floating ball valve, when a
trunnion ball valve is in operation, the force in the ball's hole generated by the upstream pressure is all transmitted to the bearing, so that the ball cannot move towards the valve seat and the latter will not bear excessive pressure. Thus, the torque of the
trunnion ball valve is small, the seat is uneasy to deform, the sealing performance is stable, the service life is long. And the
ball valve is suitable for high-pressure applications and is suitable to be made into the large-caliber one. The
trunnion ball valve has two valve body structures, including two-piece body and three-piece body. The medium flange is connected by bolts. The way to seal is that the reinforced Teflon is embedded in the stainless steel ring. The spring is arranged at the rear of the steel ring to ensure that the seat is tightly attached to the ball, maintaining the seal.
Product features:
Reliability of operation
Due to the adoption of Teflon with small friction coefficient for the valve seat and stem bearing of large-diameter
ball valve, the operating torque of the
ball valve is small. In addition, the long-term lubrication of sealing grease makes the operation more flexible.
Valve seat structure
There are two types of valve seat structures: single seal and double seal. Generally, the valve seat with self-relieving function is single seal structure, while the double seal one is additionally provided with safety valve to release pressure in the valve body.
The extension of valve stem
The extension of valve stem is suitable for buried pipeline and low temperature applications. The extension size is according to your needs. The operation modes include manual, pneumatic, electric, airdraulic operation, etc.
Strength against external forces (Safety performance)
The wall thickness of the valve body is designed according to the safety regulations of high-pressure vessels, and the strength of the resistance to force and bending of the
ball valve is in accordance with API 6D regulations.
Stem gland seal
Four o-rings and the sealing grease injection device are used for sealing the packing gland part.
