FIELD: machine building.
SUBSTANCE: invention relates to the shaft seal that contains over one sealing module, at least one liquid supply and one liquid output, provided with main seal, which relates with major part of the pressure difference. The second main seal is made in form of the radial double seal, made by two gas seals, each of them contains rotating sealing surface and fixed sealing surface, and these pairs of the sealing surfaces are correspondingly located against each other in same seal plane, at that both seal planes spreading mainly radially relatively to the shaft.
EFFECT: invention improves reliability of the device.
14 cl, 4 dwg
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