Globe valve manufacturers are one of the most widely used valves

Its popularity is due to low friction between sealing surfaces when opening and closing, durability, small opening height, ease of manufacture and ease of maintenance. It is not only suitable for medium and low pressure, but also for high pressure. The closing principle 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 tightly fit to prevent the flow of the medium. It plays an important role in the aerospace field. As an important part of aerospace equipment, it realizes the functions of medium transportation, cutting, and adjustment. Its sealing performance directly affects the safe and reliable operation of aerospace equipment. Studying the influencing factors and laws of typical sealing characteristics has guiding significance for the structural design of the valve sealing pair, thereby improving the sealing performance and reliability of the valve.

Working principle and features

Valves play an important role in cutting off and throttling the medium in the pipeline in which they are located. As an extremely important product, its sealing is to apply torque to the valve stem, and the valve stem applies pressure to the valve disc in the axial direction, so that the sealing surface of the valve disc and the sealing surface of the valve seat are closely fitted to prevent the medium from moving along the sealing surface. Gap leakage between faces.

The sealing pair is composed of the valve disc sealing surface and the valve seat sealing surface, and the valve stem drives the valve disc to move vertically along the center line of the valve seat. During the opening and closing process, the opening height is small, the flow rate is easy to adjust, the manufacture and maintenance are convenient, and the pressure is applicable to a wide range.

Compared with others commonly used in industrial production, its structure is simple and easy to manufacture and maintain. In terms of service life, the sealing surface is not easy to be worn and scratched. During the valve opening and closing process, there is no relative sliding between the sealing surface of the valve disc and the valve seat, so the sealing surface is less worn and scratched, thus prolonging the operation time. The service life of the seal pair. Globe valve manufacturers have a small disc stroke during full closing, and their height is relatively small compared to the alarm valve.