Filter Valves Type : Source Treatment Unit Model Number : AD402-A Series Auto Drain Valve Fluid: : Compressed air Proof pressure: : 1.5MPa Operating pressure range: : N.C. 0.15 to 1.0 MPa,N.O. 0.1 to 1.0 MPa Port size: : 1/2 Drain port size: : 3/8