Difference between O-type ball valve and V-type ball valve

Difference between O-type ball valve and V-type ball valve
Ball valve structure
There are many structures for ball valves, but they are basically the same. They are all circular ball cores with opening and closing components, mainly composed of valve seats, spheres, sealing rings, valve stems, and other driving devices. The valve can be opened and closed by rotating the valve stem 90 degrees. They are used in pipelines for closing, distributing, adjusting flow rates, and changing the flow direction of media. The valve seat uses different sealing forms according to different working conditions. The valve body of the O-type ball valve is equipped with a ball with a middle through-hole inside. The ball has a through-hole with a diameter equal to the diameter of the pipeline. The ball can rotate in the sealing seat, and there are annular elastic bodies on both sides of the pipeline direction to achieve sealing. The V-shaped ball valve core has a V-shaped structure, and the valve core is a 1/4 ball shell with a V-shaped notch. It has a large flow capacity, adjustable range, shear force, and can be closed tightly. It is particularly suitable for working conditions where fluid substances are fibrous.

1、 O-type ball valve structure:
The valve body of the O-type ball valve is equipped with a ball with a middle through-hole inside. The ball has a through-hole with a diameter equal to the diameter of the pipeline. The ball can rotate in the sealing seat, and there are annular elastic bodies on both sides of the pipeline direction to achieve sealing. By rotating the sphere 90 °, the direction of the through-hole can be changed, thereby achieving the opening and closing of the ball valve. The O-type ball valve adopts a floating or fixed design, and the relative moving parts are made of self-lubricating materials with extremely low friction coefficients, resulting in low operating torque. In addition, the long-term sealing of the sealing grease makes the operation more flexible. The product advantages are as follows:
1. O-type ball valve has low fluid resistance
Ball valves generally have two structures: through diameter and reduced diameter. Regardless of the structure, the flow resistance coefficient of the ball valve is relatively small. The conventional ball valve is a straight through type, also known as a full flow type ball valve, with a channel diameter equal to the inner diameter of the pipeline, and the resistance loss is only the frictional resistance of the same length of pipeline. Among all valves, this type of ball valve has the lowest fluid resistance. There are two ways to reduce the resistance of the pipeline system: one is to reduce the fluid flow rate by increasing the pipe diameter and valve diameter, which will greatly increase the cost of the pipeline system. The second is to reduce the local resistance of the valve, and ball valves are the best choice.
2. O-type ball valve switches quickly and conveniently
The ball valve only needs to be rotated 90 degrees to fully open or fully close, so it can quickly achieve opening and closing.
3. O-type ball valve has good sealing performance
The vast majority of ball valve seats are made of elastic materials such as polytetrafluoroethylene (PTFE), commonly referred to as soft sealed ball valves. Soft sealed ball valves have good sealing performance and do not require high roughness and machining accuracy on the sealing surface of the valve.
4. O-type ball valve has a long service life
Due to its excellent self-lubricating properties, polytetrafluoroethylene (PTFE or F4) has a low coefficient of friction with spheres. Due to the improvement of processing technology, the roughness of the ball has been reduced, greatly improving the service life of the ball valve.
5. O-type ball valve has high reliability
The sealing pair between the sphere and the valve seat will not experience scratches, rapid wear, or other malfunctions;
After the valve stem was changed to an internal type, the potential safety hazard of the valve stem flying out due to the loosening of the packing gland under fluid pressure was eliminated;
Ball valves with anti-static and fire-resistant structures can be used for pipelines transporting oil, natural gas, and coal gas.
The valve core (ball) of the O-type ball valve is spherical, and structurally, the ball seat is embedded in the valve body side seat during sealing. The relative moving parts are made of self-lubricating materials with extremely low friction coefficients, resulting in low operating torque. In addition, the long-term sealing of the sealing grease makes the operation more flexible. Generally used for two position adjustment, with a fast opening flow characteristic. When the O-type ball valve is fully opened, the unobstructed valve is formed on both sides, forming a straight pipe channel and bidirectional sealing. It has the best self-cleaning performance and is suitable for two position cutting occasions with particularly unclean and fiber containing media. The ball core always generates friction with the valve during the opening and closing process, and the sealing between the valve core and the valve seat is achieved through the pre sealing force of the valve seat pressing against the ball core. However, due to the excellent mechanical and physical properties of the soft seal valve seat, its sealing performance is particularly good.
2、 V-shaped ball valve structure:
The V-shaped ball valve core has a V-shaped structure, and the valve core is a 1/4 ball shell with a V-shaped notch. It has a large flow capacity, adjustable range, shear force, and can be closed tightly. It is particularly suitable for working conditions where fluid substances are fibrous. Generally, V-shaped ball valves are single sealed ball valves. Not suitable for bidirectional use.
V-shaped edge, cut off impurities. During the rotation of the sphere, the V-shaped blade of the sphere is tangent to the valve seat, thereby cutting off fibers and solid substances in the fluid. However, general ball valves do not have this function, which can easily cause fiber impurities to get stuck when closing, causing great inconvenience to maintenance and repair. And the valve core of the V-shaped ball valve will not be stuck by fibers. In addition, due to the use of flange connection, it is easy to disassemble and assemble without the need for special tools, and maintenance is also simple and easy. When the valve is closed. The V-shaped notch and valve seat create a scissor like effect, which not only has self-cleaning function but also prevents the ball core from getting stuck. The valve body, valve cover, and valve seat are each made of metal point-to-point structure, and a valve stem spring with a low friction coefficient is used. Therefore, the operating torque is small and stable.
V-shaped ball valve is a right angle rotary structure that can achieve flow regulation. It can achieve different degrees of proportion according to the V-shaped angle of the V-shaped sphere. V-shaped ball valves are generally used in conjunction with valve actuators and positioners to achieve proportional adjustment, The V-shaped valve core is most suitable for various regulating occasions, with a large rated flow coefficient, adjustable ratio, good sealing effect, zero sensitivity regulating performance, small volume, and can be installed vertically and horizontally. Suitable for controlling media such as gases, vapors, liquids, etc. The V-shaped ball valve is a right angle rotary structure, consisting of a V-shaped valve body, pneumatic actuator, locator, and other accessories; There is an inherent flow characteristic that is approximately equal in percentage; Adopting a dual bearing structure, it has low starting torque, excellent sensitivity and induction speed, and super strong shear capacity.