Method for cleaning the seat of a double seat valve and double seat valve for performing the method

Abstract

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).

Description

technical field [0001] The invention relates to a method for cleaning the seat of a double-seat valve having two closing parts arranged in series and movable relative to one another, which in the closed position of the double-seat valve prevent Fluid overflows from one valve body part of the valve body into the other valve body part, the two closures delimiting a leakage cavity between them both in the closed position and in the open position, said leakage cavity passing through An outlet opening is connected to the environment of the double-seat valve, said outlet opening being delimited by a tube axis formed on the first closing part and leading out of the valve body, and the method also has the feature according to the preamble of claim 1 other features. The invention also relates to a double seat valve for carrying out the method, having the features of the preamble of claim 9 . Background technique [0002] A cleanable-seat double-seat valve of the aforementioned type...

AI Technical Summary

Problems solved by technology

[0012] The double-seat valve according to the company document [2] or DE 10 2010 046 137 A1, of course, has a major disadvantage, that is, on the one hand the third element in the form of a flow barrier element sealed on the housing side and its arrangement in the leakage cavity The combination of construction and other features integrated into the closure arrangement leads to a complex and thus fault-prone constructional configuration of the double-seat valve

On the other hand, the additional built-in parts in the leakage cavity, together with the additionally required seals, corners and dead spaces, are in principle difficult to clean in the through-flow and are therefore unsuitable from a hygienic point of view for certain fields of application.

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