Cast Steel Bellows Seal Flanged Globe Valves

The globe valve, also known as the cut-off valve, is one of the most widely used valves. The reason why it is popular is that the friction between the sealing surfaces during the opening and closing process is small, it is more durable, the opening height is not large, and it is easy to manufacture. , easy maintenance, not only suitable for medium and low pressure, but also suitable for high pressure. The closing principle of the globe valve is to rely on the pressure of the valve stem to make the sealing surface of the valve disc and the sealing surface of the valve seat closely fit to prevent the flow of the medium. my country's valve "Three Chemicals" once stipulated that the flow direction of the globe valve shall be from top to bottom, so there is directionality during installation. The structure of the globe valve is longer than that of the gate valve, and at the same time, the fluid resistance is large, and the sealing reliability is not strong during long-term operation.
As one of the most important shut-off valves, the globe valve plays an important role in the aerospace field. As an important component of aerospace equipment, globe valve realizes the functions of medium conveying, cutoff and adjustment, and its sealing performance directly affects the safe and reliable operation of aerospace equipment. The study of the influencing factors and influence rules of the sealing characteristics of typical globe valves has guiding significance for the structural design of the valve sealing pair, thereby improving the sealing performance and reliability of the valve.
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