This valve is applicable for water pipelines with a working temperature $\le 80^\circ \text{C}$. It is installed at the highest points of horizontal pipelines to eliminate gases from the network and to draw in air when negative pressure occurs within the pipeline, preventing pipeline damage.

The double-orifice air release valve features two chambers: a large orifice chamber and a small orifice chamber. The large orifice chamber provides high-capacity air exhaust and intake, while the small orifice chamber allows micro-amounts of air to be released when the pipeline is fully filled with water. Its primary function is to prevent transient negative pressure inside the pipeline during pump shutdowns, which could otherwise lead to structural failure of the pipeline.