METHOD FOR CLEANING THE SEAT OF A DOUBLE SEAT VALVE AND DOUBLE SEAT VALVE FOR PERFORMING THE METHOD

摘要

A method for cleaning the seat of a double seat valve is provided. 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. The first seat cleaning flow is urged by the deflection surface radially inwards and axially towards the first closing member until it leaves the second closing member at a frontally and radially internal end of the second closing member, which end is located outside the recess. The deflection surface borders in its entirety the remaining region of the recess that is not delimited by the circumferential wall and opens out from the second closing at a front and radially internal end thereof that faces the first closing member.