A 216-WCB is a type of industrial valve, specifically a cast iron, resilient seated, gate valve designed for water and wastewater applications. The "WCB" designation typically indicates that the valve body is made from a cast iron material, which provides durability and strength. These valves are commonly used for on/off service in various piping systems, allowing for efficient control of fluid flow. The A 216 standard refers to the material specifications set by ASTM for cast iron valves.