The "3-way" designation indicates that these valves have three ports, enabling them to control the flow of fluid between multiple inlet and outlet paths. The "L-port" configuration refers to the internal design of the valve, where the ball or disc within the valve has an L-shaped bore. This design allows for three different flow configurations: straight-through flow, flow from the first port to the second port, and flow from the first port to the third port. One common application of PVC Metric 3-way valves with L-port configuration is in diverter or selector valve setups. For instance, in a chemical processing plant, these valves can be used to divert flow between different chemical tanks or direct flow to different stages of a production process.