As a common combined device in industrial equipment, filter-regulator-lubricator (FRL unit) plays an irreplaceable and important role in modern production. Its role is not limited to managing pressure, purification and lubrication during the flow of gas or liquid, but is also of great significance in improving production efficiency, ensuring equipment safety and extending equipment life. By effectively managing the pressure, purification and lubrication of fluid media, it can ensure the normal operation of equipment, improve production efficiency, reduce production costs, and provide a solid guarantee for the sustainable development of industrial production.