| 摘要 |
PURPOSE:To simply install a valve body into a casing and improve the air tightness at a connecting portion between the valve body and a connecting passage, by longitudinally dividing into two parts a cylindrical valve body retainer frame for retaining the valve body, and bringing the inside surfaces of flanges of the valve body into press contact with the end surfaces of the connecting portion of the connecting passage. CONSTITUTION:A valve body 2 is formed at its both ends with flanges 4 and 5. The inside surfaces of the flanges 4 and 5 are in contact with end flanges of a casing-like frame 6 divided axially. The valve body 2 is provided at its central position with a valve portion. A casing 3 has a lower opening portion formed with an external thread 30. A cap nut 31 is fastened to the external thread 30, thereby improving the air tightness at a connecting portion between the valve body and a connecting passage.
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