| 摘要 |
In order, for example, in the case of double-acting pneumatic cylinders, to facilitate the expulsion of the air from the respective rear side of the piston, a valve device is provided, in the housing of which an inlet (8) is connected to an outlet (9) by a through-flow bore (80, 90) with a lateral discharge opening (11). A piston (12) with a longitudinal piston bore (13) and a through-flow valve (14, 15) arranged therein is arranged displaceably in the through-flow bore (80, 90). When air flows from the inlet (8) to the outlet (9) through the piston (12), the discharge opening is closed. When air flows in at the outlet (9), the through-flow valve (14, 15) closes and the piston (12) exposes the outlet opening (11). <IMAGE>
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