As the tire valve mouth is an inevitable ageing problem for rubber material, the valve mouth is gradually cracked, deformed and inelastic. When the vehicle runs, the rubber valve mouth is also deformed as the centrifugal force swings back and forth, which will increase the aging of the rubber. Generally speaking, the life of the rubber valve is 3 to 4 years, which is not much different from the service life of the tire. Therefore, it is suggested to replace the rubber valve at the same time when changing the tire.
In order to avoid the aging problem of the rubber valve mouth, the metal valve mouth is gradually appearing on the market, and the valve mouth of the steel is one of them. Due to the change of material, a rubber valve to valve steel prices higher, the steel valve service life is two to three times the rubber valve, which is mainly due to the metal material is not easy to be oxidized, and the metal valve also has a more excellent air tightness.