| 摘要 |
A forged flange-type valve fabrication method that has all the left and right pipeline connections thread fastened to the two sides of the valve body. Utilizing such a forging method, one-piece or two-piece valves have a left and a right primary elements and structurally identical left and the right pipeline connection sections of a two-piece flange-type valve, the ball valve housing section of a one-piece flange-type valve, the plug, the ball valve housing section, and the ball valve position limiter section. External threads and water-tight gasket sleeves are formed on front outer side and ends of the left pipeline connection section of a one-piece flange-type valve and the left and the right pipeline connection sections of a two-piece flange-type valve. Internal threads are tapped in the left connection hole in the structurally identical ball valve housing sections of a one-piece or a two-piece flange-type valve and the right connection hole of the ball valve limiter section. The left pipeline connection section of the one-piece flange-type valve is structurally identical to the left and the right pipeline connections sections of the two-piece flange-type valve and as such either of the pipeline connection sections can be fastened tightly to the left connection hole of the ball valve housing section and the right connection hole of the ball valve position limiter section, which enables the left and the right pipeline connection sections of the one-piece or the two-piece flange-type valve to be interchangeable.
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