Patent ID: 6109591
Filing Date: 2000-08-29
Classification: F16K

Abstract:
A wide range proportional flow control valve, comprising:(a) means defining at least two relatively movable intersectable flow passages;(b) when said flow passages are moved relative to one another, the area of intersection is varied, and flow is controlled from a minimum to some maximum;(c) said flow control exhibiting substantially exponential flow change with linear relative movement of said intersectable flow passages over the entire range of operation above minimum and below maximum;(d) where said substantially exponential flow change is defined as flow=CN.sup.x, where C is a constant, N is the new orifice area/old orifice area per positive unit increment of relative movement, as, and x is an increment of movement relative to an initial position; and(e) where said flow passage intersections cooperate to provide an effective aperture having the appearance of a narrow slot rapidly diverging at one end.