Centrifugal Pump Calpeda NMM

Close coupled centrifugal pumps with screwed connection

Close-coupled, centrifugal pumps; electric motor with extended shaft directly connected to the pump.
- NM, NM4: single-impeller
- NMD: with two back-to-back impellers (with axial thrust balancing).
Rated speed of rotation (50 Hz):
- NM, NMD= 2900 rpm
- NM= 1450 rpm.
Connections: threaded ports ISO 228/1 (BS 2779).
- NM, NMD: version with pump casing and lantern bracket in cast iron.
- BNM, BNMD: version with pump casing and lantern bracket in bronze.
The pumps are supplied fully painted.

For clean liquids without abrasive, 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 irrigation.

Liquids temperature from-10deg.c. to +90deg.c.
Ambient temperature up to 40deg.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 single-phase pump to 1,5-1,8 kW).

2-pole induction motor,50 Hz (n= 2900 rpm).
NM, NMD: single-phase
- 230/400 V +-10% up to 3kW;
- 400/690 V +- 10% from 4 to 9, 2 kW;
NMM, NMDM: single-phase 230 V +- 10%, with thermal protector.
4-pole induction motor, 50 Hz (n= 1450 rpm).
NM4: three-phase 230/400 V+- 10%.
Insulation class F.
Protection IP54.
Motor suitable for suitable for operation with frequency converter from 0,37 kW for NM4 and from 1,1 kW for NM, NMD.
IE2 efficiency class for single-phase motors up to 1,1 kW.
EI3 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.

Other voltages.
Frequency 60 Hz ( as per 60 Hz data sheet).
IP protection: IP55
Special mechanical seal
Higher or lower liquid or ambient temperatures.
Motor suitable for operation with frequency converter up to 0,33 kW for NM4 and up to 0,75 kW for NM,NMD.