Ball valve packing

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

F16K 5/06 (2006.01)

Patent

CA 2473685

A ball valve includes a valve element (22) and a single piece packing (32) that seals the valve element within a valve cavity (20). The single piece packing is installed over the valve element at room temperature or may be molded thereon. The valve element may include a flow control element such as a ball (24) and upper (28) and lower (30) trunnions. The various dimensions of the valve element and packing are selected to facilitate room temperature assembly and to substantially reduce the volume of packing material, thereby improving the performance of the valve over wider temperature ranges and pressure ratings.

L'invention concerne un robinet à tournant sphérique comprenant un ensemble obturateur (22) et une garniture d'étanchéité monobloc (32) assurant l'étanchéité de cet ensemble obturateur à l'intérieur de la cavité (20) du robinet. Cette garniture d'étanchéité monobloc est installée autour de l'ensemble obturateur à température ambiante ou peut être moulée sur ce dernier. Cet ensemble obturateur peut comprendre un organe de régulation de débit tel qu'un tournant sphérique (24) ainsi que des axes supérieur (28) et inférieur (30). Les diverses dimensions de cet ensemble obturateur et de la garniture d'étanchéité sont sélectionnées pour faciliter le montage à température ambiante et réduire considérablement le volume du matériau de la garniture d'étanchéité, en améliorant ainsi les performances dudit robinet dans des larges plages de température et de pression nominale.

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