Structural principle of globe valve（1）

According to the movement of the valve disc of the globe valve, the change in the valve seat opening is directly proportional to the valve disc stroke. Due to the relatively short opening or closing stroke of the valve stem and the highly reliable cut-off function, as well as the proportional relationship between the change of the valve seat opening and the stroke of the valve disc, this type of valve is very suitable for regulating flow. Therefore, this type of valve is very suitable for use as a shut-off or regulating and throttling device.

The valve plays an important role in cutting off and throttling the medium in the pipeline where it is located. As an extremely important cut-off valve, the sealing of the globe valve is achieved by applying torque to the valve stem, and the valve stem applies pressure to the valve disc in the axial direction, making the sealing surface of the valve disc and the sealing surface of the valve seat tightly fit, preventing the leakage of the medium along the gap between the sealing surfaces.

The sealing pair of the shut-off valve consists of the sealing surface of the valve disc and the sealing surface of the valve seat. The valve stem drives the valve disc to move vertically along the centerline of the valve seat. During the opening and closing process of the shut-off valve, the opening height is relatively small, making it easy to adjust the flow rate. It is also easy to manufacture and maintain, and has a wide range of pressure applications.