About Tyre Valve
As the only part of the car in contact with the ground, the importance of the tire for the safety of the vehicle is self-evident. For a tire, in addition to the solid internal structure of the crown, belt, curtain layer, and airtight layers, have you ever thought of the insignificant valves that also play a decisive role in driving safety? The role?
■About Tyre valve introduction
The Tyre valve is a one-way valve that fills the gas in the tire and maintains the pressure in the tire. Today, tires used in automobiles are all liner-free tires. Valves and tires are separated from each other on the structure. Tyre valve are installed on the rim to play its role.
Valves are small, but they can be divided into valve body (base), gaskets, gaskets, fastening nuts, valve cores, and valve caps. Each part is also Has its own role. (Taking a metal valve as an example)
The Tyre valve body (base) is the only way for the gas to enter the tire, and at the same time accommodates and protects the Tyre valve core. From the name, the fastening nut knows that its role is to make the valve and wheel ring more stable; The gaskets of different materials are used to fasten the fastening nuts; the rubber gaskets seal the inside of the rim to prevent leakage; the valve caps that are often lost can avoid the intrusion of foreign materials on the valve nozzles. The secondary sealing of the valve is achieved, and the valve core has the function of preventing the gas from leaking out while ensuring that the gas is smoothly injected into the tire.
■Tyre valve of different materials
After the introduction of the Tyre valve, the following will be the focus of today's content, we will introduce you to the characteristics of different materials of the valve. Yes, as different metal materials are used in all aspects of automotive components, the tyre valve is no longer a single rubber material, metal material has been widely applied to the tyre valve, and in the current market, rubber, steel, aluminum The alloy valve with three kinds of materials is the most common.
Rubber valve
As the valve with the most common material, the lower cost makes the rubber valve be widely installed on the original rim, and the replacement cost is very low in the future. The price is the cheapest among the three material valves.
However, due to the inevitable aging of the rubber material, the valve body gradually cracks, deforms, and loses its elasticity. When the vehicle is running, the rubber valve will also oscillate back and forth with the centrifugal force, which will further promote the aging of the rubber. In general, rubber valve life is 3-4 years, which is similar to that of the tire. Therefore, it is recommended to replace the rubber valve when replacing the tire.
Steel valve mouth
In order to avoid the problem of rubber valve aging, metal valves have gradually appeared in the market, and steel valves are one of them. Because of the change in material, the price of steel valves is much higher than that of rubber valves.
The service life of steel valves is two to three times that of rubber valves. This is mainly due to the fact that their metal materials are not easily oxidized, and metal valves have even better air tightness.
However, the weight of the steel valve is the heaviest of the three material valves. The total weight of the four steel valves reaches 150g. Taking into account the tire's dynamic balance, the installation of steel valve after the need to assemble more weight on the rim, which will increase the unsprung mass of the vehicle.
Aluminum alloy valve
The aluminum alloy valve also belongs to the metal valve. Its service life and airtightness are comparable to those of the steel valve. However, the price goes up further. This is mainly because the aluminum alloy is lighter than steel, which undoubtedly makes the wheel more balanced. favorable.
