Views: 0 Author: Site Editor Publish Time: 2023-12-12 Origin: Site
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 shut-off valve is sealed by applying torque to the valve stem, and the valve stem moves in the axial direction. The valve flap exerts pressure to make the sealing surface of the valve flap and the sealing surface of the valve seat closely fit, and prevent the medium from leaking along the gap between the sealing surfaces.
The sealing pair of the globe valve is composed of a valve flap sealing surface and a valve seat sealing surface. The valve stem drives the valve flap to move vertically along the centerline of the valve seat. During the opening and closing process of the globe valve, the opening height is small, the flow is easy to adjust, and the manufacturing and maintenance are convenient, and the pressure application range is wide.
Compared with another commonly used shut-off valve in industrial production, an alarm valve, the shut-off valve is simpler than the former in terms of structure and is easy to manufacture and maintain. In terms of service life, the sealing surface of the globe valve is not easy to wear and scratch. During the opening and closing process of the valve, there is no relative sliding between the valve disc and the sealing surface of the seat, so the wear and abrasion of the sealing surface are small, so the sealing is improved. During the full closing process of the auxiliary service life stop valve, the disc stroke is small, and its height is smaller than that of the alarm valve. The disadvantage of the globe valve is that the opening and closing torque are large and it is difficult to achieve rapid opening and closing. Because the flow passage in the valve body is relatively tortuous, the fluid flow resistance is large, and the fluid power is lost in the pipeline.