| 摘要 |
A retarding valve at a single-tower air drier for obtaining a controlled time for the flow of regenerating air from an air tank to a desiccant cartridge has a movable valve stem (7), which is provided with a piston (14) having a slightly smaller diameter than a chamber (13), in which it is movable in hydraulic oil (15), so that a narrow circumferential slit for the oil is formed. The valve stem with its piston is biassed by a spring (16) from a position - at the beginning of each regenerating cycle - permitting flow through the valve to a position closing off flow through the valve. <IMAGE> |
