ELECTROMAGNETIC VALVE Russian patent published in 1994 - IPC

FIELD: pipeline valves and fittings. SUBSTANCE: additional spring installed between armature and shutoff member loads the latter in direction of seat. Holding effort developed by magnetically hard insert exceeds summary efforts of main and additional springs. Shutoff member has axially symmetric projection pointed to seat side with calibrated clearance formed between inner surface of projection and outer surface of seat. Valve members are made to meet preset relationship. EFFECT: enlarged operating capabilities. 1 dwg