Ball valve structure

There are many types of structures for ball valves, but they are basically the same. They are all round ball cores with opening and closing parts, mainly composed of valve seats, balls, 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 to shut off, distribute, regulate flow, and change the flow direction of the medium. The valve seat uses different sealing forms according to different working conditions. The valve body of the O-ring ball valve is equipped with a ball with an intermediate through-hole inside. There is a through-hole with a diameter equal to the pipeline diameter on the ball, which can rotate in the sealing seat. There are circular elastomers 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, a large adjustable range, shear force, and can be tightly closed, making it particularly suitable for fluid materials with fibrous structures.

1、 O-type ball valve structure:
The valve body of the O-ring ball valve is equipped with a ball with an intermediate through-hole inside. There is a through-hole with a diameter equal to the pipeline diameter on the ball, which can rotate in the sealing seat. There are circular elastomers on both sides of the pipeline direction to achieve sealing. By rotating the ball by 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 minimal friction coefficient, resulting in low operating torque. In addition, the long-term sealing of sealing grease makes operation more flexible. Its product advantages are as follows:
1. O-type ball valve has low fluid resistance
Ball valves generally have two structures: diameter reduction and diameter reduction. Regardless of which structure, the flow resistance coefficient of the ball valve is relatively small. The conventional ball valve is a straight through type, also called full flow type ball valve. The channel diameter is equal to the inner diameter of the pipe, and the Friction loss is only the friction resistance of the same length of pipe. Among all valves, this type of ball valve has the smallest fluid resistance. There are two ways to reduce the resistance of the Plumbing: one is to reduce the fluid flow rate by increasing the pipe diameter and valve diameter, which will greatly increase the cost of the Plumbing. The second is to reduce the local resistance of the valve, and ball valves are the best choice.
2. The O-ring ball valve switches quickly and conveniently
The ball valve only needs to rotate 90 degrees to complete full opening or full closing, 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 polytetraethylene (PTFE), commonly known as soft sealed ball valves. Soft sealed ball valves have good sealing performance and do not have high requirements for the roughness and machining accuracy of the valve sealing surface.
4. Long service life of O-ring ball valve
Due to the excellent self-lubrication of polytetrafluoroethylene (PTFE or F4), the friction coefficient with the sphere is small. Due to the improved processing technology, the roughness of the ball valve has been reduced, greatly increasing its service life.
5. O-type ball valve has high reliability
The sealing pair of the ball and valve seat will not have any scratches, sharp friction, or other faults;
After the valve stem was changed to an internal type, the potential accident hazard of the valve stem flying out due to the loosening of the packing gland under fluid pressure was eliminated;