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Linn - Model NM, NMD -Close Coupled Centrifugal Pumps with Threaded Ports
FromLinn-Pumpen GmbH
Close-coupled, centrifugal pumps; electric motor with extended shaft directly connected to the pump. NM: single-impeller NMD: 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 lanter bracket in cast iron. B-NM, B-NMD: version with pump casing and lanter bracket in bronze. (the pumps are supplied fully painted).
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Applications
- For clean liquids without abrasives, which are non-aggressive
- for the 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 conditions
- 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
- (16 bar for pumps NMD 25/190; NMD 32/210; NMD 40/180).
- Continuous duty.
Motor
- 2-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.
- Classification scheme IE2 for three-phase motors from 0,75 kW.
- Constructed in accordance with EN 60034-1; EN 60034-30. 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 operation with frequency converter.