Valve for controlling fluid flow

The invention relates to a valve for controlling a fluid flow, comprising a valve housing, in which a valve recess is formed, from which a fluid channel extends as far as an outer surface of the valve housing; the invention relates to a valve having two valve components which are accommodated in the valve recess so as to be linearly displaceable in each case along a common axis of movement, the valve components consisting of a first valve component and a second valve component, the first valve component being mounted on the second valve component so as to be linearly displaceable along the axis of movement, and the second valve component being mounted on the first valve component so as to be linearly displaceable along the axis of movement. And/or the second valve member is provided with an axial sealing ring which releases a fluid communication connection between the adjacent fluid channels in a release position of the second valve member, the axial sealing ring abuts against at least one axial end face of t