FIELD: mechanical engineering. SUBSTANCE: sealing device for swivel 1 includes inner and outer members 2 and 3 of swivel rotating relative to each other. These members have inner lines for passage of fluid medium; these lines are communicated through one or more ring-shaped spaces 7 at boundary between members of swivel. One swivel member 3 is provided with peripheral groove 16 on each side of ring-shaped space 7; groove 16 is used for receiving circular member 17 which is movable radially. Circular member 17 is provided with seals 18 and 19 located for static sealing relative to other swivel member 3 and for dynamic sealing between circular member 17 and side walls of peripheral groove 18 in such way that first swivel member 3 is rotatable relative to other swivel member 2 irrespective of circular members 17. EFFECT: enhanced reliability of joint. 8 cl, 4 dwg
