SEALING DIAPHRAGM AND CHECK VALVE HAVING A SEALING DIAPHRAGM FOR FLUID TECHNOLOGY APPLICATIONS

摘要

The invention relates to a sealing diaphragm (1) and a check valve (9) comprising a sealing diaphragm (1) for fluid technology applications. A sealing diaphragm (1) for fluid technology applications is to be provided, which is economical and constructionally simple to produce, which can be used as a closing means for a check valve (9) and with which unwanted interfering noise can be prevented during operation. The object of the invention is achieved by a sealing diaphragm (1) with a flat, flexible sealing section, which can be bent or curved with a fluid pressure, wherein at least one resilient frictional tooth (4) is provided on or next to the surface of the sealing section at a distance from an edge of the sealing section, designed and arranged in such a way that it forms an angle between 30° and 150° with the sealing section and it tilts together with the bending or curving movement of the flat sealing section, wherein the frictional tooth has a contact surface (7) on a side orientated in the tilting direction. The object of the invention is also achieved by a check valve (9) for fluid technology outlet openings, comprising a housing part (10) having a fluid outlet (12), wherein an above-mentioned sealing diaphragm (1) is arranged in the flow path of the outlet opening, which is in contact with a sealing surface of a seal seat with a sealing section against the direction of flow and which can be bent or curved with a fluid pressure in the flow direction, wherein the contact surface (7) of the at least one frictional tooth (4) is simultaneously in contact with a corresponding bearing surface.