| 摘要 |
A process of producing a compact swing type check valve body with reduced weight, the valve comprising a valve body (1) accommodating a sub-assembly of a disc (2) and a disc carrier (3) the sub-assembly (2, 3) constructed and disposal to swing about a hinge pin (4) during the valve operation, the valve body consisting of one each flow bore area and a neck area which together configure an interior volume for disc opening travel constituting a swept volume including a core clearance to allow interference-free swing travel of the subassembly inside the valve body wall, the process comprising the steps of constructing the swept volume in an elbow shape to allow free swinging or curvilinear travel of the disc, the swept volume forming the inner side or the core of the valve body; forming a radial clearance between the outer diameter of the disc and inner wall of the valve body; forming an outer profile of the valve body over the inner wall including the flow bore and neck areas, wherein the radial clearance is contracted based on the casting tolerances, profile of the disc, and associated valve body production parameters, wherein a dimensional offset is maintained from the formed elbow towards outer side by the disc swept volume, and wherein a wall thickness is built over the inner wall to outer wall constituting said outer profile. |
