CUT-OFF VALVE Russian patent published in 2000 - IPC

FIELD: mechanical engineering. SUBSTANCE: shut-off valve may be used with control member, primarily with electromagnetic drive. Inlet and outlet branch pipes of valve body are positioned on common axis. Cowl is placed inside body and made integral with the latter. Circular space is provided between cowl and body for working medium. Shut-off member includes internal cavity coupled to control member. Control member is provided with lines of connection to inlet and outlet branch pipes. Shut-off member is rigidly connected with rod. Distribution chamber communicating with internal cavity of shut-off member is positioned in central part of cowl. Chamber walls are made for the above-indicated rod to move along them. Control member is mounted for alternate shutting-off of connecting lines with inlet and outlet branch pipes. Construction of valve makes it possible to reduce degree of contamination of working medium coming into control member. EFFECT: enhanced efficiency. 5 cl, 3 dwg