| 摘要 |
A valve which is controlled by the pressure of the medium flowing through it, having a closing part (2), a closing spring (3) acting thereon, and a valve seating body (5) for the closing part (2). The valve seating body (5) has at least two valve seats (12) of different opening cross-section and is movable, preferably as a rotatable stopcock (5), so that each of the valve seats (12) can alternatively be assigned to the closing part (2). This allows different opening pressures to be set. <IMAGE>
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