dda7 5 16 ar pvc v c f 31u2u2fg 97721950 or a DMX model 221

or a DMX model 221 dosing pump

an external thermal switch must be connected (contact Grundfos)

cover and impeller without disturbing the pump housing or pipework

enables temperature monitoring

dda7 5 16 ar pvc v c f 31u2u2fg 97721950 or a DMX model 221DDA 7. 5 16 AR PVC V C F 31U2U2 The SMART Digital DDA is a compact positive displacement, diaphragm dosing pump with variable speed drive (stepper 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