A three-way ball valve is a type of multi-way ball valve that has three ports, allowing for the flow of fluid to be redirected in three different directions. It is typically made from stainless steel and has a ball inside with three holes that can be aligned with different ports to control the flow of fluid.

A common configuration for a three-way ball valve is the L-port and T-port.

In the L-port configuration, the valve has one inlet port and two outlet ports, with one outlet port being at a 90-degree angle to the other. This allows the flow of fluid to be directed to one outlet port or the other.

In the T-port configuration, the valve has one inlet port and two outlet ports, with one outlet port being at a 180-degree angle to the other. This allows the flow of fluid to be directed to one outlet port or both outlet ports simultaneously.

Three-way ball valves are commonly used in applications where the flow of fluid needs to be redirected or controlled in three different directions, such as in chemical processing, oil and gas, and water treatment industries. They are also used in applications where space is limited and multiple valves would be impractical.