Superior Performance in Eccentric Segment Ball Valves
The eccentric segment ball valve, also known as the eccentric half-ball valve, is a widely used design in industrial ball valves, distinguished by the eccentric structure within the ball shape. This design not only allows fluids to pass with minimal resistance during valve opening and closing but also enhances the reliability of ball valves in high-temperature, high-pressure, and corrosive environments.
Types of Eccentric Segment Ball Valves
Eccentric segment ball valves are primarily categorized into single eccentric and double eccentric types, each demonstrating unique advantages in various industrial applications. These valves find extensive use in industries such as chemical, petroleum, natural gas, meeting the demand for high-performance fluid control.
The Opening and Closing Process
Opening Process:
In the closed position, the ball is mechanically pressed against the seat by the valve stem.
Rotating the handwheel counterclockwise, the valve stem moves in the opposite direction, allowing the ball to separate from the seat.
The valve stem continues to rise, interacting with the guide pin in the stem's screw groove, allowing the ball to rotate without friction.
Until reaching the fully open position, with the valve stem at the limit position, the ball completes a 360° rotation.
Closing Process:
Rotating the handwheel clockwise, the valve stem descends, causing the ball to leave the seat and start rotating.
Continuing to rotate the handwheel, the guide pin embedded in the stem's screw groove causes both the valve stem and the ball to rotate 90° simultaneously.
Close to the end of the closing process, the ball has rotated 90° without contact with the seat.
During the last few turns of the handwheel, the angular plane at the bottom of the valve stem mechanically wedges and presses the ball tightly against the seat, achieving complete sealing.
Their Structural Features
The structural design of the eccentric segment ball valve excels in various aspects:
The Multiple Advantages: Showing Superior Performance
The eccentric segment ball valve boasts multiple advantages, making it an ideal choice for industrial fluid control:
In conclusion, the eccentric segment ball valve, with its unique design and superior performance, plays a crucial role in industrial fluid control. Its widespread application and outstanding features make it a highly favored choice in the field of industrial valves.
Types of Eccentric Segment Ball Valves
Eccentric segment ball valves are primarily categorized into single eccentric and double eccentric types, each demonstrating unique advantages in various industrial applications. These valves find extensive use in industries such as chemical, petroleum, natural gas, meeting the demand for high-performance fluid control.
Single Eccentric Segment Ball Valve: The axial line of the ball has a certain offset from the valve's centerline, reducing friction during valve operation and enhancing its lifespan.
Double Eccentric Segment Ball Valve: Introduces an additional offset, typically at the bottom of the ball, building upon the advantages of the single eccentric design. This configuration reduces friction and resistance during fluid passage, improving fluid control performance.
Double Eccentric Segment Ball Valve: Introduces an additional offset, typically at the bottom of the ball, building upon the advantages of the single eccentric design. This configuration reduces friction and resistance during fluid passage, improving fluid control performance.
The Opening and Closing Process
Opening Process:
In the closed position, the ball is mechanically pressed against the seat by the valve stem.
Rotating the handwheel counterclockwise, the valve stem moves in the opposite direction, allowing the ball to separate from the seat.
The valve stem continues to rise, interacting with the guide pin in the stem's screw groove, allowing the ball to rotate without friction.
Until reaching the fully open position, with the valve stem at the limit position, the ball completes a 360° rotation.
Closing Process:
Rotating the handwheel clockwise, the valve stem descends, causing the ball to leave the seat and start rotating.
Continuing to rotate the handwheel, the guide pin embedded in the stem's screw groove causes both the valve stem and the ball to rotate 90° simultaneously.
Close to the end of the closing process, the ball has rotated 90° without contact with the seat.
During the last few turns of the handwheel, the angular plane at the bottom of the valve stem mechanically wedges and presses the ball tightly against the seat, achieving complete sealing.
Their Structural Features
The structural design of the eccentric segment ball valve excels in various aspects:
Top-Loading Structure: Allows direct online inspection and maintenance, effectively reducing downtime and lowering costs.
Single Seat Design: Eliminates concerns about abnormal pressure increase in the valve's chamber, ensuring usage safety.
Low Torque Design: Special structure design of the valve stem facilitates easy opening and closing, reducing operational force.
Frictionless Operation: Solves the issue of friction between sealing surfaces that affects traditional valves.
Wedge Sealing Structure: The valve stem provides mechanical force, pressing the ball onto the seat to ensure reliable sealing performance under different conditions.
Self-Cleaning Structure: When the ball deviates from the seat, fluid in the pipeline uniformly passes along the ball's sealing surface, achieving a self-cleaning effect.
Single Seat Design: Eliminates concerns about abnormal pressure increase in the valve's chamber, ensuring usage safety.
Low Torque Design: Special structure design of the valve stem facilitates easy opening and closing, reducing operational force.
Frictionless Operation: Solves the issue of friction between sealing surfaces that affects traditional valves.
Wedge Sealing Structure: The valve stem provides mechanical force, pressing the ball onto the seat to ensure reliable sealing performance under different conditions.
Self-Cleaning Structure: When the ball deviates from the seat, fluid in the pipeline uniformly passes along the ball's sealing surface, achieving a self-cleaning effect.
The Multiple Advantages: Showing Superior Performance
The eccentric segment ball valve boasts multiple advantages, making it an ideal choice for industrial fluid control:
Low Fluid Resistance: The resistance coefficient is equivalent to the same length of pipe, ensuring minimal resistance during fluid passage.
Simple and Lightweight Structure: Compact design with small size and lightweight, making it adaptable to various industrial scenarios.
Tight and Reliable: Widely uses plastic sealing materials, exhibiting excellent sealing performance suitable for vacuum systems.
Convenient Operation: 90° rotation achieves full open to full close, facilitating remote control and enhancing operational efficiency.
Easy Maintenance: Simple structure with movable sealing rings, facilitating disassembly and replacement.
Corrosion-Resistant Design: Seals the sealing surfaces of the ball and seat from the medium during full open or close, preventing erosion of the sealing surfaces.
Simple and Lightweight Structure: Compact design with small size and lightweight, making it adaptable to various industrial scenarios.
Tight and Reliable: Widely uses plastic sealing materials, exhibiting excellent sealing performance suitable for vacuum systems.
Convenient Operation: 90° rotation achieves full open to full close, facilitating remote control and enhancing operational efficiency.
Easy Maintenance: Simple structure with movable sealing rings, facilitating disassembly and replacement.
Corrosion-Resistant Design: Seals the sealing surfaces of the ball and seat from the medium during full open or close, preventing erosion of the sealing surfaces.
In conclusion, the eccentric segment ball valve, with its unique design and superior performance, plays a crucial role in industrial fluid control. Its widespread application and outstanding features make it a highly favored choice in the field of industrial valves.
