The difference between O-type ball valve and V-type ball valve
Addtime：2024-05-06 From： View：458
Ball valve structure
There are various types of ball valves, but they are basically similar in structure. The basic components include a circular ball core as the closing and opening element, along with a valve seat, a ball body, a sealing ring, a valve stem, and other driving devices. The valve is opened and closed by rotating the valve stem by 90 degrees. It is used in pipelines for switching, distribution, regulating the flow rate, and changing the direction of the medium. The valve seat uses different sealing forms depending on the working conditions. The O-type ball valve has a ball body with an internal central hole. The ball has a through hole with a diameter equal to the pipe diameter. The ball can rotate in the sealing seat. On both sides of the pipeline, there are annular elastic bodies to achieve sealing. The V-type ball valve has a V-shaped structure on the ball core. The valve core is a 1/4 spherical shell with a V-shaped notch. It has a large flow capacity, a wide adjustable range, shear force, and the characteristic of tight closure. It is particularly suitable for working conditions where the fluid material contains fibrous substances.
I. Structure of O-type Ball Valve:
The valve body of the O-type ball valve is equipped with a ball inside that has an intermediate through-hole. There is a circular hole with a diameter equal to the pipe diameter on the ball. The ball can rotate within the sealing seat. On both sides of the pipeline direction, there are annular elastic bodies to achieve sealing. By rotating the ball 90°, the direction of the through-hole can be changed, thereby enabling the opening and closing of the ball valve. The O-type ball valve adopts a floating or fixed design. The relative moving parts are all made of materials with extremely low friction coefficient and self-lubrication properties, thus resulting in a small operating torque. In addition, the long-term sealing with the sealing lubricating grease makes the operation more flexible. The product advantages are as follows:
1. The O-type ball valve has low fluid resistance.
Ball valves generally have two structures: straight-through and reduced diameter. Regardless of which structure it is, the flow resistance coefficient of a ball valve is relatively small. The conventional ball valve is of the straight-through type, also known as the full-flow type ball valve. The channel diameter is equal to the inner diameter of the pipeline, and the resistance loss is only the friction resistance of the pipeline of the same length. Among all valves, this type of ball valve has the minimum fluid resistance. There are two ways to reduce the resistance of the pipeline system: one is to reduce the fluid flow velocity, which can be achieved by increasing the pipe diameter and the valve diameter, but this will greatly increase the cost of the pipeline system. The other is to reduce the local resistance of the valve, and the ball valve is the best choice.
2. The O-type ball valve operates quickly and conveniently.
The ball valve can be fully opened or closed simply by rotating it 90 degrees, thus enabling quick opening and closing.
3. The O-type ball valve has excellent sealing performance.
The majority of ball valve seats are made of elastic materials such as polytetrafluoroethylene (PTFE), and are commonly referred to as soft-sealed ball valves. Soft-sealed ball valves have excellent sealing performance, and the requirements for the roughness and processing accuracy of the valve sealing surface are not very high.
4. The O-type ball valve has a long service life.
Because polytetrafluoroethylene (PTFE or F4) has excellent self-lubricating properties and a low friction coefficient with the ball, and because the improved processing technology reduces the roughness of the ball, the service life of the ball valve has been significantly increased.
5. The O-type ball valve has high reliability.
The sealing pair consisting of the spherical part and the valve seat will not experience any faults such as abrasion or rapid wear.
After changing the valve stem to an internal type, the potential accident hazard of the valve stem flying out due to the loosening of the packing gland under the action of fluid pressure has been eliminated.
A ball valve with anti-static and fire-resistant structure can be used for pipelines transporting petroleum, natural gas and gas.
The valve core (ball) of the O-type ball valve is spherical in shape. From a structural perspective, when sealing, the ball is embedded in the side valve seat of the valve body. The parts in relative motion are all made of materials with extremely low friction coefficients and self-lubricating properties, thus resulting in a small operating torque. Additionally, the long-term sealing with the sealing grease ensures more flexible operation. Generally, it is used for two-position regulation, with a flow characteristic of quick opening. When the O-type ball valve is fully open, both sides are unobstructed, forming a straight pipe channel, and it has two-way sealing. It has the best "self-cleaning" performance and is suitable for two-position cut-off applications in particularly dirty and fiber-containing media. The ball core always rubs against the valve during the opening and closing process of the valve. Meanwhile, the seal between the valve core and the valve seat is achieved through the pre-tightening sealing force of the valve seat pressing against the ball core. However, due to the excellent mechanical and physical properties of the soft-sealing valve seat, its sealing performance is particularly excellent.
II. Structure of V-type Ball Valve:
The ball core of the V-type ball valve has a V-shaped structure. The valve core is a 1/4 spherical shell with a V-shaped notch, which has a large flow capacity, a wide adjustable range, a shear force, and the characteristic of tight closure. It is particularly suitable for working conditions where the fluid contains fibrous substances. Generally, V-type ball valves are single-sealed ball valves. They are not suitable for bidirectional use.
V-shaped edge, cutting impurities. During the rotation of the sphere, the V-shaped cutting edge of the sphere is in contact with the valve seat, thereby cutting the fibers and solid substances in the flowing fluid. However, ordinary ball valves do not have this function, which easily causes the fibers and impurities to get stuck during closure, resulting in great inconvenience for maintenance and repair. In contrast, the V-shaped ball valve has a valve core that will not be blocked by fibers. Moreover, due to the use of flange connection form, its disassembly and assembly are simple, requiring no special tools, and the maintenance and repair are also simple and easy. When the valve is closed, a wedge-shaped cutting action is generated between the V-shaped notch and the valve seat, which not only has a self-cleaning function but also prevents the ball core from getting stuck. The valve body, valve cover and valve seat are respectively made of metal point-to-point structure, and a valve stem spring with a smaller friction coefficient is used. Therefore, the operating torque is small and very stable.
The V-type ball valve has a right-angle rotary structure and can achieve flow regulation. It can achieve different degrees of proportion based on the V-shaped angle of the V-type ball. The V-type ball valve is generally used in conjunction with valve actuators and positioners to achieve proportional regulation. The V-type valve core is most suitable for various regulating scenarios, featuring a large rated flow coefficient, a wide adjustable ratio, good sealing effect, zero sensitivity in regulation performance, small size, and the ability to be installed vertically or horizontally. It is suitable for controlling gases, steam, liquids, etc. The V-type ball valve has a right-angle rotary structure, consisting of a V-type valve body, pneumatic actuator, positioner, and other accessories; it has an inherent flow characteristic approximately equal to 100%; it adopts a double-bearing structure, has a small starting torque, excellent sensitivity and response speed, and strong shear capacity.
There are various types of ball valves, but they are basically similar in structure. The basic components include a circular ball core as the closing and opening element, along with a valve seat, a ball body, a sealing ring, a valve stem, and other driving devices. The valve is opened and closed by rotating the valve stem by 90 degrees. It is used in pipelines for switching, distribution, regulating the flow rate, and changing the direction of the medium. The valve seat uses different sealing forms depending on the working conditions. The O-type ball valve has a ball body with an internal central hole. The ball has a through hole with a diameter equal to the pipe diameter. The ball can rotate in the sealing seat. On both sides of the pipeline, there are annular elastic bodies to achieve sealing. The V-type ball valve has a V-shaped structure on the ball core. The valve core is a 1/4 spherical shell with a V-shaped notch. It has a large flow capacity, a wide adjustable range, shear force, and the characteristic of tight closure. It is particularly suitable for working conditions where the fluid material contains fibrous substances.
I. Structure of O-type Ball Valve:
The valve body of the O-type ball valve is equipped with a ball inside that has an intermediate through-hole. There is a circular hole with a diameter equal to the pipe diameter on the ball. The ball can rotate within the sealing seat. On both sides of the pipeline direction, there are annular elastic bodies to achieve sealing. By rotating the ball 90°, the direction of the through-hole can be changed, thereby enabling the opening and closing of the ball valve. The O-type ball valve adopts a floating or fixed design. The relative moving parts are all made of materials with extremely low friction coefficient and self-lubrication properties, thus resulting in a small operating torque. In addition, the long-term sealing with the sealing lubricating grease makes the operation more flexible. The product advantages are as follows:
1. The O-type ball valve has low fluid resistance.
Ball valves generally have two structures: straight-through and reduced diameter. Regardless of which structure it is, the flow resistance coefficient of a ball valve is relatively small. The conventional ball valve is of the straight-through type, also known as the full-flow type ball valve. The channel diameter is equal to the inner diameter of the pipeline, and the resistance loss is only the friction resistance of the pipeline of the same length. Among all valves, this type of ball valve has the minimum fluid resistance. There are two ways to reduce the resistance of the pipeline system: one is to reduce the fluid flow velocity, which can be achieved by increasing the pipe diameter and the valve diameter, but this will greatly increase the cost of the pipeline system. The other is to reduce the local resistance of the valve, and the ball valve is the best choice.
2. The O-type ball valve operates quickly and conveniently.
The ball valve can be fully opened or closed simply by rotating it 90 degrees, thus enabling quick opening and closing.
3. The O-type ball valve has excellent sealing performance.
The majority of ball valve seats are made of elastic materials such as polytetrafluoroethylene (PTFE), and are commonly referred to as soft-sealed ball valves. Soft-sealed ball valves have excellent sealing performance, and the requirements for the roughness and processing accuracy of the valve sealing surface are not very high.
4. The O-type ball valve has a long service life.
Because polytetrafluoroethylene (PTFE or F4) has excellent self-lubricating properties and a low friction coefficient with the ball, and because the improved processing technology reduces the roughness of the ball, the service life of the ball valve has been significantly increased.
5. The O-type ball valve has high reliability.
The sealing pair consisting of the spherical part and the valve seat will not experience any faults such as abrasion or rapid wear.
After changing the valve stem to an internal type, the potential accident hazard of the valve stem flying out due to the loosening of the packing gland under the action of fluid pressure has been eliminated.
A ball valve with anti-static and fire-resistant structure can be used for pipelines transporting petroleum, natural gas and gas.
The valve core (ball) of the O-type ball valve is spherical in shape. From a structural perspective, when sealing, the ball is embedded in the side valve seat of the valve body. The parts in relative motion are all made of materials with extremely low friction coefficients and self-lubricating properties, thus resulting in a small operating torque. Additionally, the long-term sealing with the sealing grease ensures more flexible operation. Generally, it is used for two-position regulation, with a flow characteristic of quick opening. When the O-type ball valve is fully open, both sides are unobstructed, forming a straight pipe channel, and it has two-way sealing. It has the best "self-cleaning" performance and is suitable for two-position cut-off applications in particularly dirty and fiber-containing media. The ball core always rubs against the valve during the opening and closing process of the valve. Meanwhile, the seal between the valve core and the valve seat is achieved through the pre-tightening sealing force of the valve seat pressing against the ball core. However, due to the excellent mechanical and physical properties of the soft-sealing valve seat, its sealing performance is particularly excellent.
II. Structure of V-type Ball Valve:
The ball core of the V-type ball valve has a V-shaped structure. The valve core is a 1/4 spherical shell with a V-shaped notch, which has a large flow capacity, a wide adjustable range, a shear force, and the characteristic of tight closure. It is particularly suitable for working conditions where the fluid contains fibrous substances. Generally, V-type ball valves are single-sealed ball valves. They are not suitable for bidirectional use.
V-shaped edge, cutting impurities. During the rotation of the sphere, the V-shaped cutting edge of the sphere is in contact with the valve seat, thereby cutting the fibers and solid substances in the flowing fluid. However, ordinary ball valves do not have this function, which easily causes the fibers and impurities to get stuck during closure, resulting in great inconvenience for maintenance and repair. In contrast, the V-shaped ball valve has a valve core that will not be blocked by fibers. Moreover, due to the use of flange connection form, its disassembly and assembly are simple, requiring no special tools, and the maintenance and repair are also simple and easy. When the valve is closed, a wedge-shaped cutting action is generated between the V-shaped notch and the valve seat, which not only has a self-cleaning function but also prevents the ball core from getting stuck. The valve body, valve cover and valve seat are respectively made of metal point-to-point structure, and a valve stem spring with a smaller friction coefficient is used. Therefore, the operating torque is small and very stable.
The V-type ball valve has a right-angle rotary structure and can achieve flow regulation. It can achieve different degrees of proportion based on the V-shaped angle of the V-type ball. The V-type ball valve is generally used in conjunction with valve actuators and positioners to achieve proportional regulation. The V-type valve core is most suitable for various regulating scenarios, featuring a large rated flow coefficient, a wide adjustable ratio, good sealing effect, zero sensitivity in regulation performance, small size, and the ability to be installed vertically or horizontally. It is suitable for controlling gases, steam, liquids, etc. The V-type ball valve has a right-angle rotary structure, consisting of a V-type valve body, pneumatic actuator, positioner, and other accessories; it has an inherent flow characteristic approximately equal to 100%; it adopts a double-bearing structure, has a small starting torque, excellent sensitivity and response speed, and strong shear capacity.