| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve device capable of preventing fluids after passing a valve body from deviating and flowing toward the valve body in the valve device where the oscillating valve body is arranged in a pipe.SOLUTION: A valve device 1 includes a valve body 30 that is arranged so as to be turnable around a predetermined rotation shaft z1 in a pipe H in which fluids flow and that switches on/off the pipe H according to the turning.A protrusion 35 that is gradually tapered toward a main surface 31b upstream in a fluids distribution direction F in the valve body 30 is formed, and a spiral structure 35b that turns around a center axis z2 of the protrusion 35a is formed on an outer circumferential surface 35a of the protrusion 35. |
