FIELD: machine building.
SUBSTANCE: coupling contains top connection to connect with tubing of large diameter, bottom connection to connect with tubing with small diameter, expansion around part of bottom connection to connect with branch having said large diameter, channel to exhaust the companion gases, comprising longitudinal and transverse parts. At that the longitudinal part of the channel to exhaust the companion gases of the coupling passes along the coupling from its top to level of the coupling connection with the branch. The transverse part for the companion gases exhaust of the coupling is through hole passing perpendicular to the transverse part of the coupling, the hole connects the space beyond the coupling with the said expansion.
EFFECT: increased reliability and expansion of the functionality.
6 cl, 3 dwg
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