PIPELINE VALVES Russian patent published in 2012 - IPC F16K3/12 F16K49/00 

FIELD: machine building.

SUBSTANCE: in inner cavities of basic parts, mainly of the cover, which are free from zones occupied with movable parts of closing assembly there installed is(are) insert(s) made from elastomeric foam material, for example foamed polyurethane, or containing the cover from elastomeric material, for example rubber, the inner cavity of which is filled either with inert gas, or with air, or meshed cover from metal which is corrosion-resistant to the conductive medium the inner cavity of which is filled with hollow elements of various sizes, for example small balls.

EFFECT: creation of pipeline valves, including gate valves capable of withstanding multiple freezing and melting processes in inner cavities of conductive medium without destruction of basic parts, that is without loss of its operability.

4 cl, 4 dwg