The valve is a one-way valve that is used to inflate the air in the tire and maintain the air pressure in the tire. Nowadays, the tires used in automobiles are all linerless tires. The valve and the tire are separated from each other in structure, and the valve is installed on the rim to play its role. Although the valve is small, it can be divided into valve body (base), gasket, gasket, fastening nut, valve core, valve cap in structure, and each part is also Has its own role. (Take metal valve as an example)