Power Valve Series Vex Includes A Regulator Valve (Vex1*0), Precision Regulator (Vex1*3), 3 Position Valve (Vex3) And A Economy Valve (Vex5). The 3 Port Large Capacity Poppet Exhausting Regulator Is Equipped With A Relief Port The Same Size As The Connection Port. The 3-Port, 3-Position Double Solenoid That Permits Vacuum Suction, Vacuum Destruction, And Suspension (Closed) Is Ideal For A System Where Many Valves Are Used.