Italian Calpeda pumps of the NR, NR4 series (belong to the multi-row type) have a distinctive feature that is associated with their design. Pumps of this series have one impeller. Due to the direct connection of the motor to the pump using a common shaft, increased power indicators are achieved. An important feature of these series is that they can be used both for clean liquids and for compositions with expected contamination. Special designs are possible on request for environments with higher or lower temperatures.