Floating valve for air ventilation

A floating valve mounted in a vent hose connected to a surge tank of a vehicle cooling system for air ventilation, the floating valve comprising:

• an upper port including a first hollow, wherein an upper end portion of the first hollow is connected to the vent hose;
• a lower port including a second hollow, wherein a lower end portion of the second hollow is connected to the vent hose at a location facing the upper port;
• a structure portion provided to connect the upper port and the lower port to each other in fluidical communication with the upper port and the lower port;
• and
• a floating ball provided to be movable inside the structure portion so that the floating ball floats to seal an opening of the first hollow in the upper port when cooling fluid flows into the structure portion,
• wherein the structure portion includes a lower structure portion, and an inside of the lower structure portion is provided with a seating portion to allow the floating ball to be accommodated on the seating portion and provide a space through which the lower port and the lower structure portion fluidically communicate with each other,
• wherein the seating portion is formed in a shape corresponding to an external surface of the floating ball so that the floating ball is accommodated thereon, and
• wherein the seating portion consists of two parts formed in a symmetrical shape such that in a state that the floating ball is seated on the seating portion, air passes through the passage between the floating ball and the inner wall of the lower structure portion.