A valve to which the invention relates is provided with two fluid ports and with one movably guided closing member which can be switched between a first position in which it opens a throughflow cross section between the two fluid ports, and a second position in which it blocks a fluidic connection between the two fluid ports. The greatest throughflow cross section which can be opened can be limited by a stop member. The stop member can be adjusted between different stop positions by means of a remotely actuated setting device.