Water exhaust valves are suitable for water and non-corrosive gas media, widely used in water supply and drainage, HVAC and boiler systems. Suitable for normal to medium temperature conditions, the working temperature is generally 0 ℃ to 120 ℃. The main function is to automatically remove the air and gas in the pipeline to prevent air block and air lock, to ensure the safe and efficient operation of the system. Valve body materials commonly used cast iron, stainless steel or copper alloy, seals using corrosion-resistant rubber, compact structure, sensitive opening and closing, easy maintenance, adapt to a variety of complex working conditions.