Coupling system for connecting a pressure tube to a valve body

摘要

The present invention refers to a coupling system (50) for connecting a pressure tube (52) to a valve body (10). It comprises a coupling member (54) at one end of the pressure tube and an opening in the valve body for receiving a coupling member. The coupling member comprises an outer retainer ring (68) into which the pressure tube is inserted and an engaging portion (70) at the retainer ring facing the end of the pressure tube. An inner support sleeve (80) is inserted into the end of the pressure tube and extends axially at least up to the engaging portion. The engaging portion comprises engaging elements (72) that are elastically compressible in a radial inward direction and provided to engage behind a circumferential ridge (62) protruding from the wall of the opening in the received position of the coupling member.