Which port configurations characterize common ball valves?

• A. Full port and standard port
• B. Full port and multi port
• C. Reduced port and standard port
• D. Standard port and reduced port

Answer: (B)

In ball valves, how the flow path is described often boils down to bore size or “port” count. The two most common configurations you’ll encounter are full-port (full bore) and multi-port.

Full-port means the bore inside the valve matches the pipe diameter, so when the valve is fully open there’s minimal resistance and no constriction to flow. This is a typical characteristic of many common straight-through ball valves used in piping systems where you want maximum flow capacity and low pressure drop.

Multi-port refers to valves that have more than two ports, such as 3-way or 4-way configurations. These are used to direct flow along different paths or to mix/divert flows within a single valve body, offering versatile routing options without needing separate fittings.

So, the combination of full-port for straight-through flow efficiency and multi-port for versatile flow routing is what you’d most commonly see in ball valve configurations.