water-lubricated journal bearings and a volume compensating diaphragm

horizontal

pressure switch

multistage

where a pressurised system has advantages

dda 7 5 16 ar pv e c f 31u2u2fg 97721958 water-lubricated journal bearings and aDDA 7. 5 16 AR PV E C F 31U2U2F 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