The working principle of the flame retardant breathing valve:

The flame retardant breathing valve is applied to storage tanks, which may contain flammable and explosive materials.

1. The breathing valve plays a role in regulating the balance of air pressure inside the storage tank, as the rise and fall of the material liquid level will bring about a rise and fall of air pressure inside the storage tank. In addition, factors such as temperature can also affect the air pressure inside the storage tank, preventing the storage tank from overpressure rupture or excessive vacuum being flattened.

2. A flame arrester is designed to prevent external sources of fire from entering the storage tank through the breathing valve and causing a fire, such as lightning.