What is the basic working principle of the Aluminium Breather Valve?

The Aluminium Breather Valve is mainly composed of valve cover, valve body, valve disc, sealing gasket and other components. These components work together to realize the function of the breathing valve. The valve cover is usually connected to the valve body by threads or other means to protect the internal structure of the valve body, and it is also easy to disassemble and repair. The valve body is the main part of the breathing valve, usually made of aluminum alloy material, with sufficient strength and corrosion resistance. There is a channel inside the valve body for the inflow and outflow of gas. The valve disc is one of the key components of the breathing valve, usually made of lightweight materials such as aluminum or plastic. The valve disc can be opened and closed freely according to the pressure difference inside and outside the container, thereby regulating the flow of gas. The sealing gasket is located between the valve disc and the valve seat to ensure the sealing of the valve disc in the closed state. The sealing gasket is usually made of corrosion-resistant and high-temperature resistant materials to ensure its long-term reliability.
The working principle of the Aluminium Breather Valve is based on the pressure difference between the inside and outside of the container. When the internal pressure of the container rises or falls to the set value, the breathing valve will automatically open or close to maintain the air pressure balance inside and outside the container. Under normal operating conditions, the pressure in the container is maintained within the working pressure range of the breathing valve. At this time, the valve disc fits tightly on the valve seat to form a sealed state to prevent gas leakage.
When the internal pressure of the container rises to exceed the upper limit of the working pressure of the breathing valve, the high-pressure gas directly acts on the bottom of the valve disc. Since the area above the valve disc is larger than the area below, the upward thrust generated by the high-pressure gas is sufficient to overcome the gravity of the valve disc and the external air pressure acting on the top of the valve disc. At this time, the valve disc is pushed open, and the high-pressure gas in the container is discharged through the breathing valve, thereby reducing the pressure in the container.
When the internal pressure of the container drops below the lower limit of the working pressure of the breathing valve, the atmospheric pressure generates a downward thrust acting on the top of the valve disc relative to the negative pressure in the container. At the same time, due to the design of the suction valve disc, when negative pressure is formed in the container, the atmospheric pressure directly acts on the bottom of the suction valve disc through the suction channel. The combined action of these two forces causes the suction valve disc to be pushed open, allowing external air to enter the container through the breathing valve to replenish the gas in the container, thereby maintaining air pressure balance.
By automatically opening and closing the valve flap, the breathing valve can prevent the tank from being damaged by overpressure or vacuum, ensuring the safe and stable operation of the tank. The breathing valve can control the inflow and outflow of gas, thereby reducing the evaporation loss of the stored liquid and reducing the pollution to the atmosphere. This is especially important for tanks that need to store flammable, explosive or toxic and harmful media. By automatically adjusting the air pressure balance inside and outside the container, the breathing valve can ensure the stability and safety of the tank under normal working conditions. Aluminum alloy materials have excellent corrosion resistance and lightweight characteristics, making Aluminium Breather Valves adapt to the use requirements of various harsh environmental conditions.