| 摘要 |
<p>PCT No. PCT/EP92/01275 Sec. 371 Date Dec. 6, 1993 Sec. 102(e) Date Dec. 6, 1993 PCT Filed Jun. 5, 1992 PCT Pub. No. WO92/21900 PCT Pub. Date Dec. 10, 1992Described are a procedure for cleansing double seat a valve, especially one operating with low or no leakage, and a valve arrangement for implementing the procedure which guarantees, among other things, that the cleansing of the relevant areas of the double seat valve is possible with a minimal, economical and environmentally friendly use of cleansing or disinfecting agents. In terms of industrial process engineering, among other things, a partial stroke of a closing member exposes a guide passage (A or C) in such a manner that the cleanser stream (R) branches off via the exposed guide passage (A or C) out of the valve housing part (1a or 1b), thereby cleansing the guide passage (A or C), and at least one of the following areas, the other guide passage (C or A), the leakage hollow space (6), and the seating surface (2a) which has been made accessible. For implementing the procedure it is suggested, among other things, that a bore (4d) be provided in axial alignment in the second rod (4b) which is connected with the guide passage (A) on the one hand and with guide passage (C) on the other. It is also proposed that the transmission path between the bore (4d) and the guide passage (A) contain a branching point (V), from which a further connection is created to an ring slot (9) formed between the first rod (3a) and the second rod (4b) which is coaxially conveyed in the first. It is suggested that the ring slot (9) provide a connection to the leakage hollow space (6). The cleanser stream (R) should be released, branching into partial streams (R1, R2) at the branching point (V) (Figure 3a), by exposure of the guide passage (A) by a partial stroke of the first closing member (3) against the opening movement (H) of the valve, or of guide passage (C) by a partial stroke of the second closing member (4).</p> |
