| 摘要 |
PROBLEM TO BE SOLVED: To obtain a cage type decompression device that attains stable control by transferring from gap flow to normal flow smoothly and suppressing occurrence of noise, vibration, cavitation and the like in fluid decompression.SOLUTION: The number of small holes 4a on the lowest step of an outer peripheral side variable cage part 4 is made smaller than the number of small holes 4a on another step. Also, the lower end part of a blockage wall surface 2a included in a plug 2 is formed with a slant so that the side of an inner peripheral side variable cage 5 is positioned above the side of the outer peripheral side variable cage part 4. |
