Saint-gobain Performance Plastics Corporation

Filip Rousseau

Herman M Dubois

Jan Kustermans

Christophe Valdenaire

Philippe Burlot

Rojendra Singh

Mathilde Leboeuf

Benny Proost

Shabarish Nunna

Gabriele Tittonel

Simone Caglio

Denis Fernandez

Andrea Maffezzoli

Andreas Vanvaerenbergh

A seal for a ball valve comprising a resilient ring defining an engagement feature; a first polymer ring disposed adjacent to a first axial end of the resilient ring and coupled with the engagement feature; and a second polymer ring disposed adjacent to a second axial end of the resilient ring and coupled with the engagement feature.

Ball valve seal

Systems and methods are disclosed that include providing a valve suitable for maintaining a seal and preventing fluid flow through the valve at cryogenic temperatures. The valve includes a valve body having a longitudinal axis along a flow path through the valve, a ball selectively rotatable within the valve body to selectively allow fluid flow through the valve, a seat formed within the valve body and comprising a cavity having an angled wall, and a seat insert at least partially disposed within the cavity and having a first sealing surface that forms a first sealing interface with the ball to prevent leakage through a first leakage path and a second sealing surface that forms a second sealing interface with the angled wall to prevent leakage through a second leakage path when the ball valve is selectively rotated to prevent fluid flow through the valve.

Seat insert in a ball valve for cryogenic applications

A stem packing assembly including a first annular member defining a central axis, a second annular member defining a central axis coaxial with the central axis of the first annular member, and an annular energizing member defining a central axis coaxial with the central axis of the first annular member. In an embodiment, the stem packing assembly can have a leakage rate according to ISO 15848-1 of less than 1&#xd7;10mgsmfor at least 500 cycles at 160&#xb0; C., and less than 1&#xd7;10mgsmfor at least 500 cycles at &#x2212;46&#xb0; C. In another embodiment, the first annular member can include a PAEK, the second annular member can include a PTFE, and the annular energizing member at least partially includes a PTFE.

Valve and choke stem packing assemblies

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Niel, Belgium

Filip Rousseau