Fluid control valve with soft startup

Details Fluid control valve with soft startup Fluid control valve with soft startup

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 17/06 (2006.01) F16K 31/48 (2006.01)

Patent

CA 2199089

A fluid control valve includes an adjustable soft start capability. The fluid control valve isolates an input port and connects an outlet port to an exhaust port when the fluid control valve is in its closed position. A system is provided forlocking the fluid control valve in the closed position. When the fluid control valve is moved to an open position, the exhaust port is isolated and full communication between the input port and the outlet port is delayed by a piston which continues to block fluid flow between the input port and the outlet port. An adjustable by-pass passage bleeds pressurized fluid from the input port around the piston to the outlet port until a specified pressure is built up at the outlet port. When the pressure at the outlet port reaches the specified pressure, the piston is moved from a position which blocks the flow from the input port to the outlet port to a position which allows full communication between the input port and the outlet port.

Une vanne de régulation d'un fluide comporte un mécanisme de mise en marche réglable. La vanne isole un orifice d'entrée et fait communiquer un orifice de sortie à un orifice d'échappement lorsqu'elle est en position Fermé. Un système permet de bloquer la vanne en position Fermé. Lorsque la vanne est mise en position Ouvert, l'orifice d'échappement est isolé et la communication entre l'orifice d'entrée et l'orifice de sortie est retardée par un piston qui bloque l'écoulement du fluide entre les deux orifices. Un passage de dérivation réglable purge le fluide sous pression de l'orifice d'entrée autour du piston à l'orifice de sortie jusqu'à ce que la pression y atteigne un point déteminé. Lorsque le niveau déterminé est atteint, le piston est déplacé d'une position où l'écoulement est bloqué de l'orifice d'entrée à l'orifice de sortie à une position qui permet la communication entre l'orifice d'entrée et l'orifice de sortie.

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