Compress the pre tensioned spring to make the valve seat separate from the spherical surface to form a relief channel, so as to ensure that the pressure in the middle chamber can be smoothly discharged into the pipeline, avoiding the potential safety hazard caused by the abnormal pressure rise in the middle chamber. The self discharging valve seat can be used for media in any state, without abnormal pressure rise caused by chemical change or phase change of unstable media in the valve chamber. Because only one valve seat plays a sealing role during normal operation, the operating torque of the valve is relatively low. This structure has mature technology and simple manufacturing. Since only the upstream valve seat plays a sealing role for the self draining valve seat, the sealing performance of the valve will be affected when the upstream valve seat is damaged. At this time, the installation direction of the valve must be turned 180 degrees before continuing to use.

Now it seems that these problems are no longer difficult. The fork type pneumatic valve takes us into a new world of data control. He can stay anywhere between 0-90 ° to within 0.1mm. This has opened up a new world. In addition, its size is very small and its consumption is very small. Compared with the rack type, it takes up 30% less space and saves 40% of the air supply. This not only saves raw materials but also reduces the space occupied. At the same time, its service life has also increased to more than 1 million times.