10-inch vertical ball valve
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Product details
Electric Ball Valve
I. Definition and Working Principle
• Definition: An electric ball valve is a type of valve that controls the rotation of a ball through an electric actuator to achieve on-off or regulating functions. It combines the sealing performance of ball valves with the automated control capabilities of electric actuators, widely used in various industrial automation systems.
• Working Principle: The electric ball valve receives control signals (such as voltage, current, or digital signals) through an electric actuator, driving the ball to rotate 90 degrees or a specific angle within the valve body, thereby changing the on-off state of the fluid or regulating the flow rate. The electric actuator typically includes components such as a motor, reducer, and travel control mechanism, enabling precise control over the rotation angle and speed of the ball.
II. Structural Features
• Ball Design: The ball in an electric ball valve is usually designed with a full-bore or reduced-bore configuration. Full-bore ball valves have a flow passage diameter equal to the pipeline diameter, offering high flow capacity and low resistance; reduced-bore ball valves, on the other hand, reduce the ball diameter to lower costs, but at the expense of reduced flow capacity.
• Sealing Structure: Electric ball valves feature diverse sealing structures, including soft sealing and hard sealing. Soft-sealed ball valves use elastic materials such as rubber or polytetrafluoroethylene (PTFE) as the sealing surface, providing excellent sealing performance but limited temperature and pressure resistance. Hard-sealed ball valves, in contrast, employ a metal-to-metal sealing method, offering superior temperature and pressure resistance for high-temperature and high-pressure applications.
• Electric Actuator: The electric actuator is the core component of an electric ball valve, directly affecting its control accuracy and reliability. Electric actuators typically include overload protection, travel control, position feedback, and other functions to ensure stable operation of the ball valve under harsh working conditions.
III. Application Areas
• Oil and Gas Industry: Electric ball valves are used for on-off control in oil and gas pipelines, enabling remote monitoring and automated operation to enhance production efficiency and safety.
• Chemical Industry: In chemical production processes, electric ball valves control the flow of various corrosive media, ensuring the continuity and stability of production.
• Water Treatment Industry: Electric ball valves are used for inlet and outlet control in water treatment equipment, enabling automatic regulation and switching of water flow to improve water treatment efficiency.
• Power Industry: In power systems, electric ball valves control the flow of cooling water, steam, and other media to ensure the normal operation of power equipment.
• Other Industries: Electric ball valves are also widely applied in metallurgy, papermaking, food, pharmaceutical, and other industries to meet fluid control needs under various working conditions.
IV. Advantages and Limitations
• Advantages:
• High Automation Level: Electric ball valves achieve remote control and automated operation through electric actuators, reducing manual intervention and enhancing production efficiency.
• High Control Accuracy: Electric actuators can precisely control the rotation angle and speed of the ball, enabling accurate flow regulation.
• Excellent Sealing Performance: Advanced sealing structures and materials ensure reliable sealing performance of electric ball valves under high-pressure and high-temperature conditions.
• Long Service Life: The balls and seats of electric ball valves are made of wear-resistant and corrosion-resistant materials, offering a long service life and low maintenance costs.
• Limitations:
• High Cost: Compared to manual ball valves, electric ball valves have higher costs, including the cost of the electric actuator and installation and commissioning fees.
• Strong Dependence on Power Supply: Electric ball valves require a stable power supply; once the power is interrupted, they will not function properly.
• Complex Maintenance: The electric actuator of an electric ball valve has a complex structure and requires regular maintenance and upkeep to ensure its normal operation.
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