In the process of designing high-pressure globe valves, check valves and low-pressure gate valves, in addition to selecting materials reasonably, it is also necessary to analyze their design forms, mainly to selectively control the radial displacement of the valve packing. Make sure that each ring is effectively used in the packing set. When designing the valve, under the action of the pre-tightening force, each single ring must have the same amount of radial deformation, so the designer must ensure the rationality of the valve stem design, so as to avoid the medium to the External penetration, thereby continuously improving the sealing performance of the valve. In the process of installing the valve, in order to prevent the occurrence of problems such as sealing, the convex surface of the graphite packing group is usually made to face the medium, which can not only reasonably control the pressure of the valve during use, but also effectively avoid The occurrence of valve sealing problems. According to the research, it is found that if the internal pressure of the valve is larger, the larger the packing deformation will be generated, and the sealing of the valve will have higher reliability at this time, thereby further improving the quality of the valve.
