FIELD: machine building.
SUBSTANCE: pit body 1 is jointed to pipeline 2 by half-coupling 5 representing hollow half-cylinder 6 with bore 7 cut in lengthwise axis X-X to make pit bottom hole 8 aligned with half-coupling hole 9. Sleeve 11 is fitted through valve seat hole in half-coupling wall 12 after walls of sleeve 11 are cleaned. Hydraulic plug 15 is fitted in said sleeve 11 to receive unions 16 for hydraulic composition 18 to be pumped therein. Gland 16 is fitted on sleeve 11 and reinforced by screen 20 in two layers. Then, second hydraulic plug 22 made of ''Maxplug'' material is fitted on half-coupling top section 21 and reinforced gland 19. Hydraulic plug 22 hardened, protective coating 23 is fitted thereon. Said coating is made of ''Maxsill Flex'' material. Note here that gland is made from sealant based on modified silyl ''Vitrafin Bond''.
EFFECT: expanded performances, higher reliability and efficiency.
5 cl, 3 dwg
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