VACUUM TIGHT COUPLING FOR TUBE SECTIONS

摘要

The invention relates to a vacuum tight coupling for the end portions (1, 2) of two tubular sections, the size of the inner space of a first end portion (1) being smaller than that of the second end portion (2). The second end portion, with its flange extremity (11) can axially slide over the first end portion against an abutment ring (10) on said first end portion. The coupling includes at least one sealing ring (4, 5) between said end portions and a clamping ring (3) with a substantially cylindrical outer surface. The ring (3) is composed of two substantially equal halves (12, 13) with each a U-shaped cross section with an inwardly oriented recess (6), said recess enclosing said flange and said abutment against each other. The two ring halves are fixed to each other at their extremities (15, 16) and the fixing means comprises in at least one place bolting means (9).