CONTROL VALVE (VERSIONS) Russian patent published in 2010 - IPC F16K1/44 F16K47/04 

FIELD: machine building.

SUBSTANCE: group of inventions refers to accessories engineering and is designed for implementation in hydraulic control valves of systems of automatic control of parametres at steam-power installations. The control valve with flow of working medium from below consists of a case with a profiled seat and a movable part-plunger. The profiled part of the seat has sections of various shape. One of the sections is made as a cylinder, another - as a cone, while the plunger has a conic shape. Borders of the seat and the plunger are positioned in the same horizontal plane. Here is disclosed a design version of the control valve. According to this version working medium flows from above; the profiled part of the seat is made in form of a cone, while plunger profile has sections with various shape. One of the sections is made as a cylinder, another - as a cone; borders of the seat and the plunger are positioned in the same horizontal plane. Also there is disclosed a double-seat control valve with through sections made, as described above.

EFFECT: decreased levels of vibration and acoustic noise under specified economical mode of operation of controlled object, partial from nominal by hydraulic parametres, due to facilitating free extension of flow behind minimal throat.

3 cl, 3 dwg