Quarter-turn rotary plug valve with seats reciprocable...

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

Patent

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F16K 5/20 (2006.01) F16K 5/00 (2006.01) F16K 25/00 (2006.01) F16K 31/44 (2006.01)

Patent

CA 2389230

A method and apparatus for controlling fluid flow with a quarter-turn plug valve with seats operated to lift off the sealing surface (63) of the plug (64) prior to plug rotation and to reseat upon completion of plug rotation. One embodiment shown relates to a quarter-turn rotary plug valve having a handle (16) operable through a 90 angle and having both upstream and down--stream seats (101) which are operated to lift off from the sealing surface (63) of the plug prior to initiation of plug rotation and then reseat upon completion of plug rotation.

L'invention concerne un procédé et un dispositif destinés à commander un courant de liquide au moyen d'un robinet à tournant quart-de-tour comportant des sièges actionnés de manière à se soulever par rapport à la surface de jointure (63) du tournant (64) avant la rotation du tournant, et à retourner en position initiale lorsque la rotation du tournant est achevée. Dans un mode de réalisation, l'invention concerne un robinet à tournant quart-de-tour rotatif comportant une poignée (16) pouvant être tournée à 90 DEG , et des sièges amont et aval (101) actionnés de manière à se soulever par rapport à la surface de jointure (63) du tournant avant rotation du tournant, et à retourner en position initiale lorsque la rotation du tournant est achevée.

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