WEDGE GATE VALVE Russian patent published in 2015 - IPC F16K3/12 

FIELD: machine building.

SUBSTANCE: wedge gate valve contains body, gate in form of hard wedge in contact by its side surfaces with seats, O-rings. The side surfaces of the hard wedge are made spherical, on them O-rings are free installed, they are in contact with the internal cone plane with spherical surfaces of the wedge, and with outside surface in contact with seats. O-ring internal plane is at angle λ to the outside O-ring plane. The gate has pressing elements secured in groove made on the spherical side surfaces of the wedge.

EFFECT: increased tightness of the valve gate, reduced possibility of scores on the sealing surfaces of the gate under high pressure drop of the medium, and exclusion of the possibility of the gate jamming in the body slot by means of self-adjustment of the O-rings without breaching of the contact between the sealing surfaces of seats and O-rings.

3 cl, 2 dwg