| 摘要 |
The invention relates to a pneumatic pressure regulation valve (1), the through passage of which may be automatically altered, comprising an operating membrane (2), pressurised by a reference pressure, the gas pressure and by a control spring (5). On a change in the differential pressure, the operating membrane (2) is adjusted and the same or a closing body (2') operated thereby, alters the through passage through a flow cross-section (3) and a structure (30) defining the flow cross-section (3) on the membrane side forms a stop (31) for the operating membrane (2) or the closing body (2') in the closed position thereof. According to the invention, at least one front stop (4) is arranged in the pressure regulation valve (1) such that, on displacement of the operating membrane (2) in the closing direction, the operating membrane (2) or the closing body (2') first come into contact with the front stop (4) and, on further displacement of the operating membrane (2) in the closing direction, the operating membrane (2) or the closing body (2') further reduces the through passage by elastic flexible deformation or further elastic flexible deformation and in a final position also comes into contact with the stop (31). |
