Valve for conducting hyperpolarized gas

Details Valve for conducting hyperpolarized gas Valve for conducting hyperpolarized gas

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 31/122 (2006.01) F16K 3/24 (2006.01) F16K 27/00 (2006.01)

Patent

CA 2520102

The valve (10) of the present invention provides a one-piece valve stem piston (16, 18, 20) having a piston head (70) and a piston stem (72). The piston head (70) has a larger diameter than the piston stem (72). The stem (72) incorporates only a single sliding O-ring (90) in the area that seals the gas in the valve cylinder bore (44, 46, 48). The valve blocks gas flow by sealing against the positioning each O-ring over the gas flow port. This provides the valve with a low sliding friction upon piston movement. Pilot control air pressure is reduced because of the lower friction and due to the air operating on the larger surface area of the piston head (70). All materials in the construction of the valve are non-metallic.

L'invention concerne une soupape (10) qui comporte un piston de tige de soupape monopièce (16, 18, 20) à tête (70) et tige (72) de piston. La tête (70) a un diamètre supérieur à celui de la tige (72). La tige (72) comprend uniquement un joint torique coulissant (90) dans la zone d'étanchéité du gaz à l'intérieur de l'alésage du cylindre de la soupape (44, 46, 48). La soupape bloque le flux de gaz par étanchéité contre le positionnement de chaque joint torique sur l'orifice d'écoulement du gaz. Cela confère à la soupape un faible frottement de coulisse au moment du déplacement du piston. On réduit ainsi la pression d'air de commande, en raison du frottement réduit et du passage de l'air sur la surface plus étendue de la tête (70) de piston. Tous les matériaux entrant dans la réalisation de la soupape sont non métalliques.

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