초록 ▼

The invention provides an annular seating, for valves and cocks comprising a body formed with an axial duct and a movable closure member having a bearing surface associated with the seating. The seating has a metal casing having a hollow cross-section having an anchor part adapted to be held in a re

The invention provides an annular seating, for valves and cocks comprising a body formed with an axial duct and a movable closure member having a bearing surface associated with the seating. The seating has a metal casing having a hollow cross-section having an anchor part adapted to be held in a recess of the body and an annular closure part having an annular contact surface adapted to co-operate resiliently with the annular bearing surface of the closure member when the seat is in the operating position.

대표청구항 ▼

A butterfly valve for high-temperature service, comprising a body formed with an axial duct having an annular shoulder and clamping means, a butterfly rotatable around an axis which is transverse with respect to the axis of said duct, said butterfly having on its periphery a spherical bearing surfac

A butterfly valve for high-temperature service, comprising a body formed with an axial duct having an annular shoulder and clamping means, a butterfly rotatable around an axis which is transverse with respect to the axis of said duct, said butterfly having on its periphery a spherical bearing surface whose center is at the intersection of the axis of rotation of the butterfly and the axis of said duct, said spherical bearing surface being adapted to engage an annular seat fitted in said duct, said annular seat comprising anchoring means fitted between said shoulder and said clamping means, and a rounded over wing made of a resilient metal wound on itself, one end of which is integral with said anchoring means and the other end of which is free with respect to said anchoring means, wherein said rounded over wing projects oppositely to the axis of rotation of the butterfly, said rounded over wing being capable of a resilient winding movement on itself when engaged by said spherical bearing surface, said clamping means comprising an annular curved edge adapted to retain by sliding engagement therewith the rounded over wing of said annular seat oppositely to the contact zone between the seat and the butterfly.