| 摘要 |
PROBLEM TO BE SOLVED: To facilitate machining of a valve housing hole in installation of a relief valve to a manifold, secure strength of a circumference wall of the valve housing hole, and allow installation of the relief valve in a narrow space. SOLUTION: In a relief valve 47, the hole end face of a valve housing hole 61 is tapered off, while the fitting end face of a valve seat 66 is formed into a tapered shape following the tapered end face of the valve housing hole 61, and between an O-ring groove 66B in the fitting end face of the valve seat 66 and the hole end face of the valve housing hole 61, an O-ring 68 is arranged. |
