Type of impeller: Radial-flow impeller L or Axial-flow rotor R

Radial-flow impeller = L Usage: Major pressure need to be overcome. (differential head, pressure drops, high specific weight or high viscosity)	Axial-flow rotor = R Usage: Free run out and no significant pressure losses.(decanting a huge amount of liquid)

High delivery head	High delivery rate
heavy liquids (density > 1,0 kg/dm3) viscous liquids long discharge pipework differential head to overcome pressure drops due to valves, fittings, flow meter filling small canisters low power consumption at a small flow rate (0 to 55 l/min) small decrease of the flow rate at increasing operating pressure insensitive to changes in operating conditions	light liquids (density < 1,0 kg/dm3) thin-bodied liquids short discharge pipework low differential head to overcome low pressure drops emptying big containers, pumping high flow rates low power consumption at a larger flow rate (55 o 200 l/min) noticeable decrease of the flow rate at increasing operating pressure sensitive to changes in operating conditions