The VFI is the industrial version (4-20 mA output) of the Grundfos vortex flow meter range

5-16 FC-PV/T/C-F-32U2U2F The SMART Digital DDA is a compact positive displacement

DDC 6-10 AR-PP/E/C-F-31I001FG The SMART Digital DDC is a compact positive displacement

DDC 9-7 AR-PV/E/C-F-31I002FG The SMART Digital DDC is a compact positive displacement

moisture-in-motor alarm

pressure relief valves 95730784 The VFI is the industrialPressure relief valves protect the pump in case of too high counterpressure. They are installed in the discharge line near the pump, using the 2 in line connections. The side connection leads the relief liquid back into the tank.