Views: 0 Author: J-VALVES Publish Time: 2024-04-16 Origin: Site
Structure and working principle of floating ball valve
The core component of a floating ball valve is a floating ball. Under the action of medium pressure, the ball can produce a certain displacement and be tightly pressed against the sealing surface at the outlet end, thereby realizing sealing. This structure enables the floating ball valve to automatically adjust the sealing position when closed to ensure sealing performance.
Advantages of rapid opening and closing
The opening and closing operation of the floating ball valve is extremely rapid, and the switching action can be completed only by rotating 90 degrees. This rapid opening and closing ability makes it perform well in occasions where rapid cutting off or restoring fluid flow is required. For example, in an emergency shut-off system, it can respond quickly to prevent accidents.
Strategies for balancing rapid opening and closing and sealing performance
(I) Optimize the selection of sealing materials
Choosing high-performance sealing materials is the key to improving sealing performance. Elastic materials such as polytetrafluoroethylene (PTFE) are widely used on the sealing surfaces of floating ball valves due to their good chemical stability and low friction coefficient. By optimizing the formulation and processing technology of sealing materials, the wear resistance and fatigue resistance of sealing rings can be further improved.
(II) Improve the sealing structure
Adopting an elastic valve seat structure can effectively increase the elasticity of the sealing surface, thereby compensating for the decline in sealing performance caused by wear of the sealing surface to a certain extent. In addition, designing a reasonable sealing surface angle and semicircular groove structure can ensure sealing performance while reducing the opening and closing torque.
(III) Reasonably control the preload
Appropriate preload is the basis for ensuring the sealing performance of floating ball valves. Insufficient preload may lead to poor sealing at low pressure, while excessive preload will increase the opening and closing torque and even cause plastic deformation of the sealing ring material. Therefore, in the design and installation process, it is necessary to reasonably control the preload according to the actual working conditions.
