Working principle and characteristics of electric eccentric hemispherical valve
Working Principle of Electric Eccentric Ball Valve
The actuator (or wrench) drives the valve stem, forcing the closing element ball to rotate around center A. The ball moves from point B to point C. At this time, relative to the valve center point O, the trajectory from B to C is a cam-shaped eccentricity. Right-hand rotation into the valve seat closes the valve, maintaining a good seal. This product is designed based on the cam principle. During the process of the valve closing element moving from opening to closing, the force acting on the valve seat gradually increases, that is, the surface of the closing element and the valve seat gradually move from complete separation to contact, and the sealing pressure gradually increases until a complete seal is achieved. Conversely, moving backwards results in opening.
Main Features of Electric Eccentric Ball Valves
A practical ball valve, equipped with a 90° rotating electric actuator, it offers greater ease of operation and remote automation, expanding its application range. Especially in harsh environments where manual operation or normally open operation is inconvenient, the double eccentric ball valve with an electric actuator represents a new innovation in automated computer operation. This valve possesses all the advantages of double eccentric ball valves, including low opening force, effective closure to overcome scaling obstacles, and excellent sealing performance. Made of wear-resistant and corrosion-resistant materials, it is widely used in the transportation of water, steam, sewage, papermaking, petrochemicals, natural gas, solutions, and slurries—ideal equipment for conveying dusty gases, particulate fluids, and powdered solids. Electric operation further facilitates automated management and remote control. With the addition of an electric signal device, it can be used for automated operation and centralized control.
