DIAPHRAGM VALVE Russian patent published in 1999 - IPC

FIELD: manufacture of fittings. SUBSTANCE: when working medium is fed to body passage, diaphragm rests against inner surface of cover under action of pressure undergoing longitudinal strain. As a result working medium overflows to passage through clearance formed between diaphragm and seat. Circular clearance δ between side surface of diaphragm and bead is shut off due to radial tension, thus creating lateral seal excluding leakage of working medium outside. Innovation is characterized by mathematical dependence. EFFECT: simplified construction; enhanced operational reliability; increased speed of response. 2 dwg