Directional control valves are identified by the number of what component?

Directional control valves are identified by the number of piping connections because these connections indicate how many paths the fluid can take through the valve. Each piping connection corresponds to a different port that directs fluid flow in various configurations. For example, a valve with two connections typically allows for a flow in and out, while a valve with more connections may provide options for multiple outputs or inputs, enabling complicated control of hydraulic or pneumatic systems.

The number of piping connections is a critical aspect in defining the functionality of the valve, as it directly relates to the way the fluid can be routed through the system. This component is crucial for understanding how the valve integrates into the larger hydraulic or pneumatic network in machinery and equipment.