| 摘要 |
PURPOSE: To automatically limit pressure in a container to a specified value without using a pressure contactor and a safety valve by specifying a ratio between the maximum volume and the minimum volume of the upstream side compression chamber of one air ejection valve or each air ejection valve. CONSTITUTION: In this device, at least one compression chamber C1 is arranged with which a compression member (piston) 11 driven by a motor means 13 is cooperated, and the volume of the compression chamber C1 is compressed between the maximum volume and the minimum volume by the compression member 11 so that compressed air can be fed to a reservoir 1 through one air ejection valve of this compression chamber C1 or each air ejection valve 15. At this time, a ratio between the maximum volume and the minimum volume of the upstream side compression chamber C1 of one air ejection valve or each air ejection valve 15 is set to from 1.2 to 20. |
