The globe valve is one of the most widely used valves. It is popular because of the small friction between the sealing surfaces during opening and closing, which is relatively durable, the opening height is small, the manufacturing is easy, and the maintenance is convenient. It is suitable for high pressure in medium and low pressure. The closing principle of the shut-off valve is that, relying on the pressure of the valve bar, the sealing surface of the valve disc and the sealing surface of the valve seat are closely fitted to prevent the medium from circulating. China’s valve “three-way to give” has stipulated that the flow direction of the stop valve, all from top to bottom, so the installation is directional. The structure of the shut-off valve is longer than the gate valve, and the fluid resistance is large. When the machine is operated for a long time, the sealing reliability is not strong.
As one of the most important shut-off valves, the shut-off valve plays an important role in the aerospace industry. As an important component of aerospace equipment, the shut-off valve realizes the functions of medium conveying, cut-off, adjustment, etc. Its sealing performance directly affects the safe and reliable operation of aerospace equipment. Studying the influencing factors and influence rules of the typical shut-off valve sealing characteristics, it has guiding significance for the structural design of the valve sealing pair, thus improving the sealing performance and reliability of the valve.