A coupling device for use on ends of loading arms for coupling to loading adapters on transportation vehicles, the coupling device including a first coupler member having a first valve, a second coupler member having a second valve, first and second members arranged and configured to displace at least a portion of fluid from a plurality of mating regions between the first and second coupler members, and a volume defined between the first and second coupler members having an inlet conduit and an outlet conduit, the inlet and outlet conduits connected to an external fluid control and integrated in the first coupler member.