FIELD: change-over of flow. SUBSTANCE: valve has sleeve 112 with stepped guide passage (180, 182) for valve piston 114 which has projection 184 axially dividing second stage 182 of guide passage into first end control chamber 186 and second circular control chamber 188. first connecting passage 194 available in sleeve 112 is used to connect second circular control chamber 188 with circular chamber 180 receiving lateral inlet 30 of main flow. Free section of valve seat 144 and free section of main axial flow 146 correspond approximately to section of first stage 180 of guide passage. EFFECT: improved dynamic of valve. 9 cl, 4 dwg
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