A V-type ball valve has a V-shaped opening on one side of a hemispherical valve core. By adjusting the valve core opening, the cross-sectional area for media flow is changed, thus regulating flow rate. It can also be used for on/off control to open or close pipelines. It has a self-cleaning function, can achieve minute flow rate regulation within a small opening range, has a large adjustability ratio, and is suitable for media containing fibers, fine particles, and slurries. The designation VQ is used to denote a V-type ball valve. The design standard is JB/T 13517.
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Working Principle of a V-Type Ball Valve
The ball of a V-type ball valve is V-shaped. The actuator, controlled by an air source, rotates the ball axially to either the opening or closing angle. Because the V-type ball valve provides a bidirectional seal, it can be installed in any orientation. In the closed state, the small ball size ensures excellent sealing performance and prevents fluid leakage. In the open state, the ball is at a 45-degree angle, minimizing resistance to fluid flow.
V ball valve Drive and Control Methods
Pneumatic Actuators
Driven by pneumatic piston or rack and pinion actuators, these achieve rapid opening and closing and proportional adjustment. With a valve positioner, precise opening control is possible, making them suitable for automation systems.
Electric Actuators
Combined with electric actuators, these support remote control and intelligent adjustment. Electric V-ball valves offer fast operation and are suitable for scenarios requiring high-frequency operation.
V ball valve Structural Features
V-Shaped Cutout Design
A V-shaped opening is formed on one side of the ball core, creating a wedge-shaped shearing effect with the metal valve seat. As the ball core rotates, the flow area between the V-shaped opening and the valve seat continuously changes, achieving flow regulation. This design gives the valve self-cleaning capabilities, cutting off fibrous impurities and preventing media accumulation.
Fixed Ball Structure
The fixed ball design prevents the ball from moving with pressure, reducing friction and wear and extending service life. The valve seat is loaded by a leaf spring, ensuring reliable sealing with a leakage rate ≤10⁻⁶ × rated flow coefficient.
Eccentric Structure and Hardening Treatment
Some models (such as the V1000V hard-seal eccentric V-type regulating ball valve) employ an eccentric design. The ball core surface is treated with hard chrome plating, ion nitriding, or supersonic spraying to improve surface hardness and enhance wear resistance and corrosion resistance.
V ball valve Advantages
Superior Performance
Adjustment Accuracy: Flow characteristics are equal percentages, with an adjustable ratio up to 100:1 (some models reach 300:1), suitable for fine flow control.
Low fluid resistance: Low pressure drop loss in the fully open state, improving system efficiency.
Wear-resistant and corrosion-resistant: Made of stainless steel, carbon steel or special coating, suitable for high temperature, high pressure and strong corrosive media.
Easy to operate: Supports remote automatic control, and opens and closes quickly (90° rotation completes the switch).
V ball valve Typical Application Scenarios
- Chemical/Petroleum: Processing corrosive media, high-viscosity fluids, and materials containing particulate matter (such as lime slurry).
- Pharmaceuticals/Food: Meets hygiene standards and is used for precise dosage control (e.g., Medtonic Pharmaceuticals case).
- Water treatment: regulating flow and pressure, and controlling water quality.
- Gas/Compressed Air: Control gas emissions and pressure to prevent pipeline fluctuations.
- Heating, ventilation and air conditioning: regulates system flow and temperature to improve energy efficiency.
- Power/Lighting: Ensure stable pipe connections and avoid arcing interference.
V ball valve factory
