FIELD: mechanical engineering. SUBSTANCE: movable partition 3 in the form a flexible diaphragm is mounted in case 1 with outlet nozzle 2 to form working and control chambers 4 and 5 respectively. Drive rod 7 is fastened to diaphragm 3. Axial bore 9 is made in working valve 6, the end of rod 7 which has spring 10 is positioned in bore 9. Cowl 8 is fastened in chamber 4. Rod 7 is built up from rod members 15, 16 connected for movement relative to each other. The partition 3 has corrugations 11. Members 15, 16 are connected by flexible or telescopic link 17. EFFECT: improved structure. 3 cl, 3 dwg
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