Patent ID: 6293518
Filing Date: 2001-09-25
Classification: F16K

Abstract:
A lift valve having a nominal diameter size and comprising a casing having end-face surfaces arranged parallel to one another for sealing abutment against sealing faces of pipelines or abutting components; a valve stem arranged in a casing neck perpendicular to a pipeline axis; and a closure element which is connected to the valve stem and interacts with a valve seat in said casing; wherein the end-face surfaces of the casing each are formed on a region of the casing which surrounds the closure element; the valve seat is oriented obliquely with respect to the valve stem, and the valve seat is arranged as a connecting oblique element in the region between the end-face surfaces of the casing; the end-face surfaces of the casing being spaced apart a distance which is greater than a length of the closure element projected onto the pipeline axis, and said lift valve having a casing wall thickness, valve seat length, and junction size between the valve seat and the casing which are configured to provide said lift valve with an overall length equal to the distance between the casing end-face surfaces and not greater than the nominal diameter of the lift valve size.