The sealing performance is good, but all the load of the sphere bearing the working medium is transmitted to the outlet sealing ring. Therefore, it is necessary to consider whether the sealing ring material can withstand the working load of the sphere medium. When subjected to higher pressure impact, the sphere may deviate . This structure is generally used for medium and low pressure ball valves.
The ball of the ball valve is fixed and does not move after being pressed. The fixed ball valve is equipped with a floating valve seat. After the pressure of the medium, the valve seat moves, so that the sealing ring is pressed tightly on the ball to ensure sealing. Bearings are usually installed on the upper and lower shafts of the sphere, and the operating torque is small, which is suitable for high-pressure and large-diameter valves.
In order to reduce the operating torque of the ball valve and increase the reliability of the seal, the oil-sealed ball valve appeared again, which not only injects a special lubricant between the sealing surfaces to form an oil film, which enhances the sealing performance and reduces the operating torque. Suitable for high pressure and large diameter ball valves.
1. The three-way ball valve adopts an integrated structure in structure, a sealing type of four-sided valve seat, few flange connections, high reliability, and a lightweight design.
2. The three-way ball core is divided into T type and L type, with long service life, large circulation capacity and low resistance.
3. The ball valve is divided into two types: single-acting and double-acting according to the action type. The feature of the single-acting type is that once the power source fails, the ball valve will be in the state required by the control system.
