Recommend Regulating Pressure Range: 30-120PSI.Max Regulator Pressure: 130PSI Regulator Inlet & Outlet Port Size: 1/4" BSP,can filter small particles, keep the air clean. Small size,light weight, easy installation and maintenance Instructions: First, get some tape and wrap a couple tape on ALL fittings. Remove it and replace it with a double ended male threaded fitting. Install one end to your compressor. Unscrew the moisture trial from the bottom of the filter and screw it on to the double male firing. Adjust the filter as vertical as possible and replace the moisture tap. If the output pressure is higher than the set pressure, the discharge pressure of the atmosphere to maintain a stable output Air filter regulator is that adjust The main channel of air pressure to a pressure value