| 摘要 |
The invention relates to a method for cleaning the seat of a double seat valve (1) and a double seat valve (1) for performing the method, which, even if the cross-sectional surface of the discharge bore is smaller than that of the largest tube conduit that can be connected to the double seat valve, ensure that the seat cleaning flow is guided to the greatest possible extent without swirling into and out of the leakage cavity, and reliably avoid a pressure-increasing, direct impact on the seat regions. This is technically achieved in that the first seat cleaning flow (R1) is urged by the deflection surface (4d) radially inwards and axially towards the first closing member (3) until it leaves the second closing member (4) at a frontally and radially internal end (4e) of the second closing member (4), which end is located outside the recess (4b). The double seat valve (1) for performing the method is characterised in that the deflection surface (4d) borders in its entirety the remaining region of the recess (4b) that is not delimited by the circumferential wall (4c) and opens out from the second closing member (4) at a front and radially internal end (4e) thereof that faces the first closing member (3). |
