- Pressure regulator with water separator for compressed air. Quick connection is a standard 1/4 inch female thread. Includes a filter, a pressure gauge, a water separator, and two interface types to fit most compressors on the market. - Associated parameters: pipe diameters PT1/8 and PT1/4. Pressure adjustment range 0.5-8.5 kgf/cm2, maximum adjustable pressure 9.5 kgf/cm2. Operating temperature range 5-60 C. - Easy to use: connect to a 1/4 inch port, then pull up the regulator and turn the black top knob to set the desired pressure. Designed to protect the water separator from mechanical pollution and water ingress, and to maintain a constant operating pressure for even air supply and smoother operation. - Full copper construction: made of high-quality metallic copper with a smooth surface and no sharp edges. The water separator surface coating is rust resistant, wear resistant and corrosion resistant. It helps filter and dry air to keep the air supply clean. - Practical use scenarios: 1) In a workshop, supply clean, dry air to spray guns or pneumatic tools with stable pressure. 2) In a manufacturing line, maintain consistent air pressure for actuators and pneumatic valves while removing moisture. 3) In general maintenance tasks or DIY projects, ensure reliable operation of air blow guns and small compressors.