Year1
Structural Features of Forged Steel Ball Valve Body
This forged steel ball valve body adopts a side-mounted valve body structure, which consists of three valve bodies: the main valve body, the left valve body and the auxiliary valve to form a valve cavity. Among them, the structures of the left valve body and auxiliary valve body are relatively simple, while the structure of the main valve body is relatively complex.
Technical requirements for forged steel ball valve bodies
The main valve body cavity of the forged steel ball valve body has a highly precise inlaid valve seat hole. One end is the end flange connected to the pipeline and the other end is connected to the left valve body. The side flange of the connection has a gasket mounting hole on the side flange surface, and above it there are a thrust gasket mounting hole, a support hole for the valve stem and a stuffing box.
The accuracy of the seat hole, the support hole of the valve stem and the stuffing box hole in the inner cavity of the main valve is generally r. The surface roughness of the sealing gasket mounting hole on the side flange surface is generally r. The roughness of other processed surfaces for r.
Structural features of forged steel ball valve cover forging blanks
The lower end surface of the lower end flange of the forged steel ball valve cover has a high-precision convex stop (boss) connected to the valve body and has a valve body sealing welding lip The upper end of the side structure valve cover has a flange connected to the bracket and packing pressure plate. There is a stuffing box hole inside the upper end of the valve cover. The stuffing box hole has an internal stop and a graded precision hole. The stuffing box hole and the protruding stop on the lower end surface have coaxiality. The lower end of the inner hole is required to be the upper sealing part connected to the valve stem. There are multiple bolt holes on both the lower and lower flanges. The middle outer circle part is a heat sink structure, and the inner and outer surfaces of the entire valve cover part need to be machined to complete each surface. Surface roughness is one of the important factors to consider in processing.
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