Diaphragm valve

Abstract

A diaphragm valve (1) is proposed having a valve housing (2) and a valve part (3) movable relative to the valve housing. The valve part (3) comprises a diaphragm carrier (6) which can be driven to perform a switching movement (26), which carries a sealing diaphragm (8) fixed there, which delimits the valve chamber (7), the valve seat (47) is located in the valve cavity (7). The sealing diaphragm (8) has a sealing section (53) lying opposite the valve seat (47), which at least partially belongs to the loose diaphragm section (55) of the sealing diaphragm (8), when the diaphragm carrier is in the When removed from the valve seat (47) in the case of switching, the loose diaphragm section (55) can be lifted from the diaphragm carrier (6) in order to reduce the stress on the sealing diaphragm (8).

Description

technical field

[0001] The invention relates to a diaphragm valve with a valve housing and at least one valve part movable therewith, wherein the valve part has a diaphragm carrier which is movable relative to the valve housing when a switching movement is carried out and which is connected to the valve housing A flexible sealing membrane delimiting the valve chamber together with the body, wherein the sealing membrane is fastened in a sealed manner on the valve housing at its outer edge region and has a spaced distance from this and is fixed on the diaphragm carrier and participates in it. Stationary diaphragm section for converting movement, wherein a valve seat facing the sealing diaphragm is arranged in the valve chamber, the sealing section of the sealing diaphragm being at least partially supported by the base surface of the diaphragm carrier facing the valve chamber in a sealable manner Pressed against the valve seat to isolate at least two fluid passages leading into t...

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