| 摘要 |
<p>PROBLEM TO BE SOLVED: To make the amount of fluid remaining between a flange 92 and a valve seat 102 little by arranging a valve seat 102 and a flange close to each other, and to eliminate a fear of deteriorating environment of the earth by suppressing the leakage of remaining fluid at a permissible small degree when the flange is taken off at altering and removing of piping. SOLUTION: This stop valve 90 is provided with the flange 92 and the through hole 93 in a valve box 91. In this through hole 93, a valve seat fixing screw portion 94, a valve rod guide screw portion 95, and a plug screw-in portion 96 are engraved in order from the flange 92 side, and a tube inserting hole 97 is opened so as to have a tilting angle ofθin regard to the through hole 93. A columnar valve rod 101, a bush 103 having a valve seat 102, and a plug 104 are respectively screwed and brazed in the valve rod guide screw portion 95, the valve seat fixing screw portion 94, and the plug screw-in portion 96. And a copper tube 105 having suitable length is inserted and brazed in the tube inserting hole 97.</p> |
