| 摘要 |
The invention relates to an overflow valve (10) for a gaseous fluid, having a piston (26) which is prestressed by means of a compression spring (28) and is received in a cylinder (16, 18) of the overflow valve (10) such that it can be displaced along a longitudinal centre axis (14). Moreover, it is provided in said overflow valve that a sealing ring (42) for radial and axial sealing is arranged on a piston underside (40), that the radial outer side (48) of the sealing ring (42) bears against the cylinder (16, 18) on the inner side with the formation of a radial press fit, that the sealing ring (42) bears against a hollow-cylindrical valve seat (44) in a closed state of the overflow valve (10) as a consequence of the prestress of the compression spring (28), and that the sealing ring (42) is raised up from the valve seat (44) with the formation of an annular gap (82) in an open state of the overflow valve (10) after a predefined limit pressure of the fluid is exceeded, in order to release a flow path (84) for the fluid. |
