Overview of DYQ340Y upper mounted eccentric ball valve: The DYQ340Y upper mounted eccentric ball valve has a structural design similar to a three eccentric hard seal butterfly valve, with advantages such as easy operation, no friction during opening, zero leakage, and long service life. Characteristics of DYQ340Y upper mounted eccentric ball valve: 1. Low pressure loss: When fully open, water loss is zero and the flow channel is completely unobstructed; The inner cavity is automatically cleaned, and the valve core rotates 90 degrees to automatically flush the valve body inner cavity, removing impurities from the medium and preventing the medium from depositing in the valve cavity. The sphere is hemispherical in shape, with the highest Cv value for circulation, enhancing the system efficiency of the pump and minimizing abrasion. 2. Particle wear resistance: Using the principle of double eccentricity, during the closing process, the ball crown only moves towards the ball seat at the last moment without forming friction; And the sealing ring on the valve seat is welded with wear-resistant self-lubricating alloy, which is not easy to wear and is not easily washed away; The ball crown and valve seat of the knife shaped ball mouth have wiping, cleaning, and shearing functions, which are not easy to scale. 3. Automatic compensation for reliable sealing: When under positive pressure, the principle of eccentricity is used to make the ball and valve seat tighter as they close, thereby achieving good sealing; When subjected to back pressure, the floating valve seat automatically pushes towards the sphere under compression. The higher the pressure, the tighter the valve seat becomes towards the sphere, resulting in a good seal; Can maintain a long-lasting tight seal and adapt to harsh working conditions. In long-term use, if the valve seat seal is worn or damaged, the valve seat will automatically push towards the ball under the action of the spring, thereby achieving good automatic compensation function. 4. Suitable for high flow rate media: The ball is hidden on one side of the valve chamber, forming a straight passage without flow resistance. The sturdy eccentric fixed crankshaft ensures no vibration or noise in high flow rate media. 5. Long lifespan and easy switch: no vulnerable parts, due to the eccentric effect, the sealing surface between the ball and the valve seat is completely detached during the valve opening and closing process, allowing for frictionless rotation between the valve seat surface and the spherical surface of the ball crown, effectively reducing the operating torque and twisting, and making the operation easy; The automatic compensation function of the valve greatly improves its lifespan. 6. Easy maintenance: This valve is designed with a top mounted design, with the ball crown and supporting ball body installed from the top of the valve; During maintenance, it is only necessary to open the valve cover and lift out the ball crown and supporting ball body for repair and sealing rings and other accessories, without having to remove the entire valve from the pipeline. This brings great convenience to underground pipelines, especially ball valves used in the atomic energy industry. 7. This valve can retain the medium in the pipeline as appropriate during maintenance operations, without causing energy waste; This eliminates many preliminary auxiliary tasks for the user, making maintenance more straightforward. 8. In some specific situations, this valve can be repaired without affecting the normal operation of the pipeline system. As long as the upper opening is quickly closed after removing the ball assembly, the pressurized operation of the pipeline can be immediately restored, minimizing the loss of benefits caused by repairing the valve.