| 摘要 |
<p>PURPOSE:To enable the pneumatic cooling in pneumatic cooling work to be automatically controlled, by parallelly providing plural control circuits, which comprise a pressure reducing valve and a selector valve as one set, in the pilot air curcuit of an air regulator. CONSTITUTION:Plural control circuits, in which a pressure reducing valve 10 and a selector valve 11 are connected in series, are parallelly provided in a pilot air circuit 9 of a pilot controlled air regulator 2. In this way, a pressure in the main circuit 1 can be regulated to a prescribed level by opening the selector valve 11 of the pressure reducing valve 10, preset to a desired cooling pressure, so as to control operation of the pilot controlled air regulator 2. Accordingly, the pneumatic cooling of pneumatic cooling work can be automatically controlled.</p> |
