Valve fitting for a tire assembly of a working vehicle equipped with a central tire inflation system (ctis)

A valve fitting comprising:

• a fitting body defining a fitting passageway;
• a supply port in fluid communication with the fitting passageway;
• a supply port coupler operable to connect the supply port with an associated feed port coupler providing a pressurized fluid;
• a working port in fluid communication with the fitting passageway;
• a working port coupler operable to connect the working port with an associated tire of a tire assembly of an associated work vehicle;
• a supply valve moveable in the fitting passageway between:
• a first position A closing the fitting passageway from the supply port;
• and
• a second position B opening the fitting passageway to the supply port;
• a biasing assembly biasing the supply valve towards the first position A;
• and
• an actuator assembly comprising an actuator member operable to urge the supply valve towards the second position B against the bias of the biasing assembly in response to the associated feed port couple being connected with the supply port coupler.