STOP VALVE Russian patent published in 2006 - IPC F16K3/02 

FIELD: valving.

SUBSTANCE: stop valve comprises sealing insert that is clamped between the bottom and top members and first inlet and second outlet sides. The sealing insert has rigid housing that is secured to the regions whose rigidity is less than that of the rigid housing. The regions of lesser rigidity have the region of contact and pressing zones in the flange connections. The areas have also the other zones that are clamped between the first inlet side member and bottom and top members and between the second output side member and bottom and top members. The insert for setting the stop valve in the housing has piping member that is mounted in the flow and is made for permitting receiving the sliding member. The piping member of the insert has rigid housing whose one part is rigidly connected with the agent of low rigidity.

EFFECT: enhanced reliability.

33 cl, 9 dwg