Both V-shaped and O-shaped ball valves are a type of 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 the two, we can better understand and use them, and provide assistance for product selection.
1、 Structure and characteristics of V-shaped ball valve
V-shaped ball valve is an efficient valve with a unique design that features a V-shaped 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. Suitable for media containing fibers, fine particles, and slurries. The code of V-shaped 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-ring ball valve
The core of the O-ring ball valve is an integral ball, and the flow port is circular, so it is called an O-ring ball valve. The majority of the ball valves we use are O-ring ball valves. Its flow resistance is small, and 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. 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-shaped ball valves and O-shaped ball valves
1. The difference between the two is that the valve core structure is different. The flow passage of the O-ring ball valve is a complete circular shape, equipped with a double seat seal. The V-shaped ball valve is a 1/4 hemisphere valve core, with a V-shaped port on one side and a single seat seal. Some also use a global valve core, with a V-shaped flow port at one end, in the form of single seat sealing or double seat sealing.
2. Suitable for different media. O-ring ball valves are mostly used for clean media or small amounts of suspended particle media, and can achieve zero leakage when sealed with PTFE PTFE 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-shaped ball valves often use metal hard seals for media containing fibers, fine particles, and slurry. Because V-shaped ports and valve seats can cut fiber media, 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.
3. The applicable process control requirements vary. O-type 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-shaped ball valve has a V-shaped port, good adjustability, and a large adjustable ratio, up to 100:1 or higher. Equipped with pneumatic and electric actuators, mainly used for regulation and control, can also be used for switch control.
4. The flow characteristics are different. The flow characteristic of the O-ring ball valve is fast opening, suitable for switch control. The flow characteristics of V-shaped ball valves are approximately equal percentages and are suitable for regulating and controlling.
5. The size of the flow channel is different. There are generally two types of flow channel sizes for O-ring ball valves: full bore and reduced bore. The flow passage of V-shaped ball valves has different sizes according to process and design requirements, and is generally reduced in diameter. Different ball cores can be replaced to meet different flow requirements.