Ventil zur Verhinderung eines freien Durchflusses in Infusionsleitungen

摘要

An anti-siphon valve (6) for medical infusion lines and the like comprises a diaphragm made of elastic material interposed between one first tubular connector (2) and one second tubular connector (3), and co-operating with an annular valve seat (11) to keep the anti-siphon valve (6) normally closed. The diaphragm consists of a bottom wall (8) of a cup-shaped element (7), the external peripheral edge of which is normally kept pressed in fluid-tight contact against the annular valve seat (11) under the axial thrust exerted by the side wall (9) of the cup element (7).