CONTROL VALVE Russian patent published in 2000 - IPC

FIELD: pipeline control fittings. SUBSTANCE: control valve is intended for use in different production lines of heat and electric power plants and hydroelectric power plants, in particular in control systems of steam condensate level in high-pressure heaters and low-pressure heaters of turbine plant regeneration system. Control valve has straight-flow body, delivery and drain branch pipes positioned in body, seat and turning disc slide valve with peripheral holes made in them and power element taking-up medium pressure. When aligned, the above-indicated holes couple delivery and drain cavities of body. Slide valve is coupled to drive spindle and provided with bushing connected to it by fillet-shaped section. Power element is made as membrane with rigid centre. Membrane is secured over periphery between ends of slide-valve bushing and spindle. Active areas of fillet-shaped section ledges are of the same size. Rigid centre of membrane is positioned inside slide-valve bushing for transmission of medium power action on valve body through supporting rod. Rod is passed through central holes made in seat and slide valve. EFFECT: enhanced reliability of operation. 3 cl, 2 dwg