FIELD: pipe line engineering. SUBSTANCE: perforated insert 1 is conical. The diameter of the perforation holes is decreased from the inlet to the outlet. Spacers 3 made of a silencing material are interposed between springs 4 and flange 2 on both of its sides. The damper is provided with plunger 8 and additional bearing ring 14. Supporting rings 6,14 abut against housing 13. Guides 5 are secured between rings 6 and 14. Housing 13 is provided with passageways wherein plunger 8 passing through seals 9 are received. One end of plungers abuts against pressing ring 7. The other end abuts against adjusting screw 11 with lock nuts 12. Perforated insert 1, supporting and pressing rings 6,14, and 7, guides 5, springs 4, and spacers 3 are mounted inside a common cell. EFFECT: enhanced reliability. 4 dwg
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