Ball valves and gate valves have significant differences in structure, working principle, characteristics and application occasions.
Structure and Working Principle
Ball Valve: Control the flow of fluid by rotating the ball. When the ball rotates to be parallel to the pipeline axis, the fluid can pass; when the ball rotates 90 degrees, the fluid is blocked. The structure of the ball valve allows it to work under high pressure. The valve ball is fixed, and the valve stem and the support shaft decompose part of the pressure from the medium, reducing the wear of the valve seat, thereby extending the service life of the valve.
Gate Valve: Control the flow of fluid by lifting and lowering the valve plate. When the valve plate moves upward, the fluid channel is fully opened; when the valve plate moves downward to fit with the bottom of the fluid channel, the fluid is completely blocked. The valve plate of the gate valve bears great pressure from the medium, causing the valve plate to press against the downstream valve seat, increasing friction and wear of the valve seat.
Advantages and Disadvantages of Ball Valves and Gate Valves
Ball Valve:
Advantages: simple structure, good sealing, fast opening and closing, low fluid resistance, suitable for high-pressure and large-diameter pipeline systems. Suitable for occasions where fluids need to be quickly cut off or connected, easy to operate, small size, and easy maintenance.
Disadvantages: not suitable for regulating high-viscosity fluids and small flows.
Gate Valve:
Advantages: good sealing, low resistance, simple structure, suitable for cutting off or opening fluids. Strong flow regulation ability, suitable for large-diameter pipelines.
Disadvantages: slow opening and closing speed, not suitable for regulating high-viscosity fluids and small flows.
Differences in application scenarios
Ball Valve: widely used in pipeline systems in the fields of petroleum, chemical industry, natural gas, etc. for fluid control and regulation.
Gate Valve: commonly found in pipeline systems in the fields of water supply, drainage, sewage treatment, etc., for cutting off and opening fluids.
Post time: Mar-10-2025