An air actuated valve is a type of valve that uses air pressure to control the flow of liquids and gases. This type of valve is often used in industrial applications, such as in water treatment plants, oil and gas refineries, and chemical processing plants. Air actuated valves are usually composed of a body, a stem, and a diaphragm. The body is the outer casing of the valve and contains the stem and diaphragm. The stem is the part of the valve that is connected to the diaphragm and is used to open and close the valve. The diaphragm is the part of the valve that is connected to the air pressure and is used to control the flow of the liquid or gas. Air actuated valves are often used in applications where a high degree of accuracy and control is required, such as in the control of pressure, temperature, and flow rate. Air actuated valves are also often used in applications where a quick response time is needed, such as in the control of valves in a water treatment plant. Air actuated valves are a reliable and cost-effective way to control the flow of liquids and gases in industrial applications.