NR, NR4
In-line pumps
SCOPE
2 / 110
mc / h
PREVALENCE
2 / 39
m
POWER
0.25 / 7.5
kW
, 
, 
, 
Execution
Close-coupled, single-impeller, centrifugal pumps; electricmotor with extended shaft directly connected to the pump.
NR, NR4 series: Single head electropumps.
NRD, NRD4: Twin head pump with built-in automatic switching valve. The two head can operate singularly or in parallel.
Pump casing with suction and delivery connections with the same diameter and on the same axis (in-line).
Version with frequency converter (on request)
Applications
For clean liquids without abrasives, which are non-aggressive for the pump materials (solids content up to 0.2%).
For heating, air-conditioning, cooling and circulation plants.
For civil and industrial applications.
When low noise operation is required (n ≈ 1450 rpm).
Utilisation limits
Liquid temperature from -10 °C to +90 °C.
Ambient temperature up to 40° C.
Total suction lift up to 7 m.
Maximum permissible working pressure up to 10 bar.
Continuous duty.
Motor
2-pole induction motor, 50 Hz (n ≈ 2900 rpm).
NR(D): three-phase 230/400 V ± 10% up to 3 kW;
400/690 V ± 10% from 4 to 18,5 kW.
NRM: single-phase 230 V ± 10%.
4-pole induction motor, 50 Hz (n ≈ 1450 rpm).
NR4: three-phase 230/400 V ± 10% up to 3 kW;
400/690 V ± 10% for 4 kW.
Insulation class F.
Protection IP 54.
Motor suitable for operation with frequency converter from 0,37 kW for NR4 and from 1,1 kW for NR(D).
IE3 efficiency class for three-phase motors (IE2 up to 0.65 kW).
Constructed in accordance with EN 60034-1; EN 60034-30-1. EN 60335-1, EN 60335-2-41.
Watch the videos
Case History
Case History
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