<p>The check valve comprises a housing in which is installed a cage-like insert for the support of a spring element and for the guiding of a shut-off component against the spring element. The cylindrically and cup-like constructed shut-off component (10) is guided on the insert (5) by its cylindrical generated surface (18) and by a flat outer face (13) lies against the sealing seat (14). The bottom face (11) of the shut-off component has a deformation (15) centering the spring element (9).</p>
