What is the purpose of a pressure regulator in a pneumatic system?

In a pneumatic system, the primary function of a pressure regulator is to maintain a steady output pressure, ensuring consistent performance even when there are fluctuations in the input pressure. By regulating the air pressure, it allows the downstream components and tools to operate effectively and safely, as they can rely on a constant pressure level to perform their required tasks.

For instance, if the input pressure from the compressor varies due to load changes or other factors, the pressure regulator will adjust to maintain the specified output pressure. This capability is essential for applications where precise pressure control is necessary for effective operation, such as in cylinders, valves, or pneumatic tools.

In contrast, the other options address functions that are not within the primary role of a pressure regulator. Increasing air pressure is the role of the compressor, while cooling compressed air typically involves additional equipment such as air coolers. Filtering moisture is typically managed through separate moisture separators or filters. Thus, the main purpose of a pressure regulator is to ensure stable and reliable pressure output in a pneumatic system.