A flow control valve includes a body having a body bore oriented coaxially with a longitudinal axis of the body and a seat member extending into the bore. The position of each polygon on the optic axis is set so that at least adjacent polygons are partially superimposed. Uses of the disclosed binder compositions as binders for non-woven fibers and fiber materials are also disclosed. Also in the method, a ground conductor is coupled to a second terminal of the transistor.