Device providing an effective seal for a spherical rotary slide valve
AssigneeSociete Nouvelle Auxim (Societe Anonyme)
InventorGabriel Seguenot
Life of this patent
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Abstract
A ball-type valve comprises a rotary valve member in a housing or valve body whose ducts communicating with the passage in the valve member are provided with respective sealing devices. These sealing devices comprise elastomeric formable rings received in blind recesses around the respective ducts and communicating therewith by orifices opening behind each deformable ring so that the fluid pressure in the respective duct under pressure will urge the deformable ring against the annular gasket and press the gasket against the rotary valve member.
Claims12
In a sealing device for a valve with a spherical rotary valve member of the type in which an effective seal between a valve body and the rotary valve member is insured by means arranged within the body around ducts provided in said body for passage of the fluid each include an annular gasket capable of being pressed against the rotary valve member by means reacting to the hydrostatic pressure, the improvement wherein the means reacting to the hydrostatic pressure are constituted by at least one ring of a material elastically deformable under pressure, located at the bottom of a blind annular recess formed in said body and communicating with the corresponding duct for passage of the fluid and between the bottom of the recess and engaging and pressed against the annular gasket to form a continuous sealing assembly therewith.
Dependencies are inferred from the claim text.