ELECTROMAGNETIC VALVE Russian patent published in 1994 - IPC

FIELD: pipeline valves and fittings. SUBSTANCE: sleeve is secured on electromagnet armature at side of shutoff member pressed to seat by main spring. Hole is made in sleeve bottom and circular projection is made inside sleeve concentrically with hole. Shutoff member is loaded by additional spring towards seat. Effort of additional spring in compressed state is less than initial pressing effort of main spring. Valve members are made to meet preset relationship. Height of seat is greater than height of projection. Height of seat exceeds sum of sleeve bottom thickness, height of projection and travel of additional spring. EFFECT: enlarged operating capabilities. 3 cl, 2 dwg