Commissariat a L'energie Atomique Et Aux Energies Alternatives

Technetics Group France Sas

Garlock France Sas

Commissariat a L'energie Atomique

Michel Lefrancois

Laurent Guimet

Jean-François Juliaa

Christian Rouaud

Patrick Le Gallo

Philippe Caplain

Florent Ledrappier

Jean-Marie Gentzbittel

Richard Levoy

Olivier Constant

Fabienne Le Guyadec

Christophe Darles

Ludovic Morice

Frédéric Sauvinet

Philippe Reynaud

Christophe Mengelle

Bertrand Thevenon

Jean-Jacques Darque

Marin Tessier

Etienne Boyer

Tony Zaouter

Thierry David

Marin Teissier

A metallic sealing assembly between a rotating shaft and a fixed frame comprises: a flexible metallic seal having two tori, inner and outer, that are concentric and of different average diameters, comprising a metal envelope which encases and holds the inner and outer tori; a shaft rotating about an axis of rotation, comprising an annular shoulder against which the seal comes to press; a counter-face, comprising a contact face against which the seal comes to press; a wedge block positioned around the rotating shaft such that the seal is held between the wedge block and the contact face, the wedge block mounted to slide on the rotating shaft; a metal part which forms a cap through which the rotating shaft passes and which is secured to the frame and/or to the counter-face, the rotating shaft being free to rotate with respect to the cap and axially secured to the cap.

Metallic sealing assembly for sealing between a rotating shaft and a fixed frame

A static metal seal comprising an outer sealing layer, wherein the outer sealing layer comprises a textured surface that is configured to come into contact with the surfaces that are to be sealed, the textured surface comprising a network of depressions spaced apart from one another on the textured surface, wherein the depressions are blind, do not pass all the way through the outer sealing layer, and do not communicate with one another.

Metal seal comprising a textured outer sealing layer

A metal sealing system for a triple eccentricity butterfly valve includes a dynamic metal seal, having a metal core surrounded by an external coating; a metal case with an external surface that has an inclined conical shape, including a first housing inside which the dynamic metal seal is mounted; a metal cover fixed to the metal case to allow it to close by flush fitting of the upper or lower faces of the metal cover and the metal case, the metal case having a second housing into which the metal cover fits, the dynamic metal seal being located between the metal cover and the surface of the metal case defining the first housing.

Metal sealing system for triple eccentricity butterfly valve

An annular assembly for compressing a seat of a ball-valve, including: a valve body or insert, including an annular internal counter-bore that defines an inner counter-bore diameter; a sleeve inserted into the annular internal counter-bore, defining at least one outer diameter of the sleeve; the body or the insert defining with the sleeve an annular housing in which the assembly includes, in succession: a downstream stack of head rings, an annular head shim, a stack of mechanisms of compression, an annular base shim, and an upstream stack of base rings.

Assembly for compressing a ball valve seat

The seal comprises a casing made of two portions () crimped into one another with an accurate hermetic position adjustment at interfaces () and a composite structure comprising inside the casing an advantageously flexible and resilient core () and a winding () of brush bristles. This structure directly extends facing internal faces () facing each other in the casing, which compresses the same and has an arcuate shape having a slightly higher radius of curvature. The composite structure is held at an accurate position, firmly but free of constraint.

Brush-type circular seal

A static sealing element () includes an elastic tapered washer () the deformation of which enables a force to be transmitted, a casing () to establish the seal, and two supporting washers (and) which transmit the forces originating from the elastic washer () to the curved edges () of the casing () so as to exert on them a pressure which maintains the seal. The casing () made thus be manufactured from a ductile material, but one which is less deformable than the customary elastomers.

Sealing element having an elastic tapered washer and casing to exert pressure

A sealing joint comprises, compressed between two parts, a stack of flexible strips separated by offset supports (); an envelop () surrounds this structure () and ensures its sealing. Under compression, the strips distort around the supports becoming very stiff for little distortion. Thus, we can rightly be wary of the consequences regarding the relief of strain on the material, notably at high temperatures.

Sealing joint with laminated internal structure for very high temperatures

The seal can be used at high temperature. It is composed of a central flexible graphite core () maintained in its shape by two metal cups () that do not touch. It is all surrounded by a tight sheath () enabling the flexible core () to be maintained in a neutral atmosphere such as a partial vacuum or a neutral gas.

Flexible graphite sealing joint with metal jacket for high temperature

Growing community of inventors

Saint Etienne, France

Michel Lefrancois