An ASTM A351 CF3 control valve is a valve made from stainless steel SA-351 CF3, which is the cast equivalent of type 304L stainless steel. CF3 has a lower carbon content compared to CF8, enhancing its weldability and reducing the risk of decreased corrosion resistance around the weld areas. This type of control valve is designed to regulate fluid flow by varying the size of the flow passage based on signals from a controller, enabling precise control of flow rate and the management of process parameters such as pressure, temperature, and liquid level.