Abstract: 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.

Abstract: A coupling device for use in a fluid system comprising a first coupler member (10) having a first valve means (14) and a second coupler member (20) having a second valve means (24), said coupling members (10, 20) being configured to cooperate with each other to provide a coupling device, each of the coupler members having means for connection to a fluid system and means for fastening the two members to each other; and said valve means (14, 24) being configured to cooperate with each other and to control fluid flow (F) through their respective coupler member. Fluid displacement means (15, 16, 17a,b, 18a,b) are arranged and configured for displacing at least a portion of fluid which is confined in the mating regions (M1, M2) between the coupler members (10, 20).