dda 200 4 fcm pvc v c f 31u3u3fg 99159406DDA 200 4 FCM PVC V C F 31U3U3 The SMART Digital DDA is a compact positive displacement, diaphragm dosing pump with variable speed drive (PMS motor) and intelligent control electronics with minimum energy consumption. The SMART Digital Dosing series operates at full stroke length to ensure optimum accuracy, priming and suction, even for high viscosity or degassing liquids. The duration of each discharge stroke varies according to the capacity set,