Maintaining sterile conditions in a fluid transportation system

A capping device configured to terminate a first connector while disconnected from a second connector a fluid transportation system, said first connector comprising an exposed surface portion, said exposed surface portion being enclosed when the first connector is connected to the second connector, said capping device comprising:

• a body defining a chamber with having an opening;
• a liquid-containing disinfectant in the chamber;
• a sealing element arranged in the opening to form a sealed cavity retaining the disinfectant;
• and
• a structure configured to engage and guide the first connector towards the body such that a portion of the first connector displaces the sealing element into the chamber,
• wherein
• a circumferential portion of the sealing element is in continuous contact with a cylindrical wall portion of the chamber during a displacement of the sealing element into the chamber, and
• the sealed cavity is configured such that the displacement of the sealing element into the chamber causes a pressure inside the sealed cavity to increase, thereby actively pressing the disinfectant out of the sealed cavity and on to at least part of the exposed surface portion.