Patent ID: 6085787
Filing Date: 2000-07-11
Classification: F16K,Y10T

Abstract:
A control valve comprising:a valve body including a first and a second flow channel connected with each other;a turnable, cup-formed closure member located within the valve body; anda shaft extending outside the valve body for turning the closure member;whereby the inner surface of the closure member is a surface of revolution, the center axis of which is the turning shaft of the closure member, and on the sides of the closure member there is at least one opening which, in the open position of the valve, is connected with the flow channels of the valve body;in the body of the valve there is an extension of the second flow channel, the outer surface of which extension is a surface of revolution concentric with the inner surface of the closure member, and which extend within the closure member against the inner surface of the closure member, and on the sides of which there is at least one opening; andthe at least one opening of the closure member is located so that in the open position of the valve it at least partly overlaps the at least one opening of the extension of the flow channel, and in the closed position of the valve the at least one opening of the extension of the flow channel is covered by the closure member, wherein an edge of each at least one opening of the flow channel extension is provided with a seal fitted against the closure member.