APPARATUS FOR CONTROLLING FLUID FLOW Russian patent published in 1997 - IPC

FIELD: fluid flow control in power plants. SUBSTANCE: apparatus includes drive in the form of electromagnetic linear step motor whose builtup stator is combined with body of apparatus. Said stator has alternating fluid-tightly connected one with another non-magnetic and magnetic members. Each pair of said members serves as poles of motor and form window for arranging control winding. Armature of said motor is in the form of sleeve and it is rigidly joined with movable member of regulating organ. EFFECT: enhanced reliability, increased operating life period. 2 dwg