ConstructionClose-coupled, centrifugal pumps; electric motor withextended shaft directly connected to the pump.NM: single-impellerNMD: with two back-to-back impellers (with axial thrust balancing).Connections: threaded ports ISO 228/1 (BS 2779).NM, NMD: version with pump casing and lantern bracket in cast iron.B-NM, B-NMD: version with pump casing and lantern bracket in bronze.(the pumps are supplied fully painted).ApplicationsFor clean liquids without abrasives, which are non-aggressive forthe pump materials ( solids content up to 0.2%).For water supply.For heating, air-conditioning, cooling and circulation plants.For civil and industrial applications.For fire fighting applications. For irrigation.Operating conditionsLiquid 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(16 bar for pumps NMD 25/190; NMD 32/210; NMD 40/180).Continuous duty (S3 60% for 1,5-1,8 kW)Motor2-pole induction motor, 50 Hz (n ≈ 2900 rpm).NM, NMD: three-phase 230/400 V ± 10% up to 3 kW;400/690 V ± 10% from 4 to 9,2 kW;NMM, NMDM: single-phase 230 V ± 10%, with thermal protector.Insulation class F. Protection IP 54.Motor suitable for operation with frequency converter from 1,1 kW.IE2 efficiency class for single-phase motors up to 1,1 kW.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.Special features on request– Other voltages. – Frequency 60 Hz (as per 60 Hz data sheet).– Protection IP 55. – Special mechanical seal– Higher or lower liquid or ambient temperatures.– Motor suitable for operation with frequency converter up to 0,75 kW.
