| 摘要 |
In a throttle device for a pressure control apparatus, the return line inside a pressure control valve or in the line course outside it is provided with a cross-sectional constriction that throttles the flow. This cross-sectional constriction is variable automatically, as a function of the flow rate and hence of the prevailing pressure, in such a way that at a low flow rate a small flow cross section and at a high flow rate a large flow cross section results. It is thus possible to design the return line pressure as high as possible over a wide range of the flow rate and to keep the pressure difference between the inflow line and return line slight and thereby to minimize the noise production in the pressure control valve. |
