PROCEDURE FOR ASSEMBLY OF GLOBE VALVE Russian patent published in 2010 - IPC F16K5/06 F16K27/10 

FIELD: machine building.

SUBSTANCE: procedure consists of assembly of two coupled semi-cases with plug and seat, in boring aperture for flange installation and in welding flange around circumference to edge of bored aperture. An additional recess is made in an upper journal of the plug. Boring of the matching bore for installation of the flange is preliminary made in two coupled semi-cases of the valve. Diametre of the matching bore is 1-2 mm bigger, than matching diametre of the flange. The plug and the seat with associated elements are installed in the case of the global valve. The coupled semi-cases are inter-tightened providing a welding gap along perimetre of a locking seam. The locking seam is welded; the flange is assembled upon case cooling. The flange is fixed in process accessories. Axis of process accessories maximally coincides both with axis of the plug and axis of the flange. Process accessories with the attached flange are arranged in the recess of the upper journal of the plug. Thus fitted flange is tack welded to the case of the global valve in several points. Further bottom run is welded. The process accessories are removed and the seam is finally welded. When the case is cooled, the global valve is finally assembled with installation of a spindle and sealing with associated elements.

EFFECT: increased service life of global valve and its reliability during operation, reduced total labour input for assembly.

3 dwg