Three Ways to Improve the Quality of Sealing Pair of Pneumatic Ball Valve
1. Ball of pneumatic ball valve The ball of pneumatic ball valve can be divided into floating pneumatic ball valve and fixed pneumatic ball valve. However, no matter what kind of ball, especially large pneumatic ball valve, the dead weight of the ball will bring adverse effects on the sealing performance and service life of the valve. For example, the ball of the floating ball has no supporting shaft, so the fitting surface of the seal seat bears its dead weight. Therefore, under the same working condition, the greater the dead weight of the ball, the greater the wear on the sealing fitting surface in its dead weight direction, which greatly reduces the service life of the pneumatic ball valve. At the same time, once the preload of the bath towel between the sphere and the seal seat disappears, the greater the mass of the ball, the greater the differential pressure necessary to reduce the sealing, which greatly reduces the low-pressure sealing performance. Similarly, if the pneumatic ball valve is equipped with a pneumatic device for quick opening and closing, its inertia torque will be several times, dozens of times increased. Therefore, how to think of ways to reduce the dead weight will have considerable social and economic benefits for the performance and life of products, inertia torque and even manufacturing costs. Cast thin wall balls and hollow balls are used abroad, and cast balls are also used domestically. However, the casting quality cannot pass the standard. Even as a qualified part, a unique processing method, called plate balling process, has been explored. With this method, the utilization rate of plate is up to 60%, the weight is reduced by 50%, and there is only one weld, which is at a less critical fitting surface.

The device stress of stainless steel pneumatic butterfly valve should not be too high
As the stainless steel pneumatic butterfly valve can be bent at will and the internal stress generated by bending under the condition of the rated bending radius is very small, it can bring great convenience to the operation of the device and also play a certain role in ensuring the safe operation of the pipeline system, which is the main reason why some pipeline systems must use the pneumatic butterfly valve.
However, in a complex pipeline system, there are often difficulties in the work of the device due to the constraints of space and location: formed pipes cannot be installed; Some cold corrections will inevitably occur when the pipes are bent, straightened and fitted. According to the pipe diameter and the detailed situation on site, the cold correction amount ranges from several millimeters to tens of millimeters, some hundreds of millimeters. Theoretically, the greater the amount is, the higher the internal stress will be. These residual device stresses in the pipeline system are undoubtedly a great hidden danger, which will cause the occurrence of problems such as pneumatic butterfly valve fracture and affect the safety of the pipeline.
The smaller the device stress of the stainless steel pneumatic butterfly valve, the easier the device work will be, and it will also play a great role in ensuring the safety of the pipeline. I hope you can control the device stress when installing the stainless steel pneumatic butterfly valve.