| 摘要 |
PURPOSE:To prevent the occurrence of freezing due to content moisture and make operation sure, by installing dryer interposingly between a pneumatic forming device and a selector valve, in case of an air leveling damper type level-control device. CONSTITUTION:Pressure air formed in a compressor 6 is fed to a dryer 8 and, after content moisture is removed, further fed to a solenoid valve 13 through a pipe 30. And, during stoppage of the compressor, the dryer 8 is made lower in its position than that of the valve 13 whereby condensed mositure in the valve 13 and the pipe 30 is gathered in the dryer 8 and removed. With this constitution, sticking of moisture to the solenoid valve 13 is prevented from occurring, so that even at the wintertime, a freeze of the moisture is obviated, thus operation is made securable. |
