The Differences between The V-typed Ball Valves and O-typed Ball Valves
Both V-typed and O-typed ball valves are a type of the ball valve. Two types of ball valves have different structures and characteristics, which are suitable for different working conditions. By analyzing the differences and characteristics between them, we can better understand and use them, and provide assistance for product selection.
1.Structure and characteristics of V-typed ball valves
The V-typed ball valve is an efficient valve with a unique design that features a V-typed opening on one side of the hemispherical valve core. By adjusting the opening of the valve core, the cross-sectional area of the medium flow can be effectively changed, achieving precise flow control. At the same time, it can also be used for switch control to achieve the opening or closing of pipelines. This valve has a self-cleaning function and can achieve small flow adjustment within a small opening range, with a large adjustable ratio. It is suitable for media containing fibers, fine particles, and slurries. The code of V-typed ball valve is VQ, and its design complies with JB/T 13517 standard. Having high reliability and stability, it is an indispensable and important component in the field of fluid control.
2.Structure and characteristics of O-typed ball valves
The core of the O-typed ball valve is an integral ball, and the flow port is circular, so it is called an O-typed ball valve. The majority of the ball valves we use are O-shaped ball valves. Its flow resistance is small. The switching process only requires the valve core to rotate 90 degrees, so the switching speed is fast. Equipped with an AT cylinder, it can be used as a quick shut-off valve. Its inlet and outlet are sealed with two valve seats, ensuring reliable sealing. It can be used for gases, vapors, liquids, and media containing small amounts of suspended particles. Design standards refer to GB/T12237.
3.Differences between V-typed ball valves and O-typed ball valves
A. The difference between them is that the valve core structure is different. The flow passage of the O-typed ball valve is a complete circular shape. It is equipped with a double seat seal. The V-typed ball valve is a 1/4 hemisphere valve core, with a V-typed port on one side and a single seat seal. Some also use a global valve core, with a V-typed flow port at one end, in the form of single seat sealing or double seat sealing.
B. It is suitable for different media. O-typed ball valves are mostly used for clean media or small amounts of suspended particle media. It can achieve zero leakage when sealed with PTFE valve seats. However, when the medium contains a lot of impurities or granular media, it is easy to cause blockage in the middle chamber, causing the ball valve to lock and the switch to malfunction. V-typed ball valves often use metal hard seals for media containing fibers, fine particles, and slurry. Because V-typed ports and valve seats can cut fiber media, and they are widely used in the paper industry. Due to the use of partial spherical valve core and single seat sealing, it effectively prevents medium blockage of the valve.
C. The control requirements of applicable process vary. O-typed ball valves are mainly used for switch control and have poor regulating performance. Equipped with an AT pneumatic piston actuator, it can achieve rapid cutting. The V-typed ball valve has a V-typed port and a large adjustable ratio, up to 100:1 or higher. Equipped with pneumatic and electric actuators, it is mainly used for regulation and control. It can also be used for switch control.
D. The flow characteristics are different. The flow characteristic of the O-typed ball valve is fast opening, which is suitable for switch control. The flow characteristics of V-typed ball valves are approximately equal percentages and are suitable for regulating and controlling.
E. The size of the flow channel is different. There are generally two types of flow channel sizes for O-typed ball valves: full bore ball valves and reduced bore ball valves. The runner of V-typed ball valves has different sizes according to the process and design requirements, and reduced bore ball valves are generally used. Different ball cores can be replaced to meet different flow requirements.