| 摘要 |
PURPOSE:To improve air-tightness of a valve, by providing in the intermediate part of a pitch interval of flange tightening bolts a V-shaped cooling water hold, making two in one set and communicating with each other, while connecting the cooling water hole with each peripheral groove, in the case of the valve for high temperature and high pressure fluid. CONSTITUTION:A flange 5 is tightened to a valve main unit 1 by flange tightening bolts 6, and cooling water holes 8-11 are radially drilled respectively in the valve main unit 1 and the flange 5. The cooling water hole 8 and 9 and the cooling water hole 10 and 11 are mutually formed in a V-shape making two in one set, while the cooling water holes 8, 9, 10 and 11 are respectively connected with peripheral grooves 12, 13, 14 and 15. consequently, a valve, generating little temperature difference between valve members, causes also no leak of steam. |
