| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure control device 10 equipped with a rectifier 44 for preventing pressure fluctuation which occurs downstream of the pressure control device 10. SOLUTION: The pressure control device 10 includes a valve seat 11 and the rectifier 44. The valve seat 11 is installed in a channel through which fluid flows, divides the channel into an upstream side channel 12 and a downstream side channel 13, and defines an aperture 14 whose inner diameter is smaller than the inner diameter of the upstream side channel 12. An aperture axis and the upstream side channel axis forms an angle. The aperture axial direction shows the flowing direction of the fluid flowing through the aperture 14, and the upstream side channel axial direction shows the direction of the fluid flowing in the upstream side channel 12. The rectifier 44 is arranged upstream of the valve seat 11, and provided with a plate-shaped guidance part 46 and a cylindrical guidance part 48. The plate-shaped guidance part 46 is formed as the plate-shaped section installed almost in parallel with the upstream side channel axis, and the cylindrical guidance part 48 is installed at the plate-shaped guidance part 46, and guides the fluid upstream of the aperture 14 to the downstream side. COPYRIGHT: (C)2009,JPO&INPIT
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