DDE Series Digital Dosing Pump, Type Key: DDA 120-7 AR-SS/T/SS-F-31A3A3BG.7 GPH Max Flow, 102 PSI Max Pressure, 122 °F Max Operating Temp. 3/4" x 3/4" NPT Female Control Variant A with alarm relay and analog input (DDA, DDC) w/Front-Mounted Control Panel & Standard Valve.