CLOSURE SYSTEM FOR PIPELINES SHUT-OFF Russian patent published in 2009 - IPC F16K7/07 F16K27/00 

FIELD: machine building.

SUBSTANCE: invention relates to piping accessories and can be used for pipelines shut-off of different purposes, through which it is transported liquid medium or gas. Closure system or pipelines shut-off of contains through casing with expansion and flexible sluice. Expansion of casing is implemented in the form of pipe bend, installed crosswise casing. In the capacity of sluice it is installed damped and fixed by ends bend of flexible elastic hose pipe so, that flow passage of casing intersects pipe bend in middle part from the side of major radius of band surface. Ratio of dimensions of casing and band of pipe are selected from the condition, in which flow passage of the device in open position is more or equal to section of connected pipes.

EFFECT: reduction of hydraulic friction and for design simplification of closure system.

3 dwg