Calpeda Close-coupled, centrifugal pumps - Nm, Nmd

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 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 (S3 60% for single-phase pump to 1,5-1,8 kW).

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.

4-pole induction motor, 50 Hz (n ≈ 1450 rpm).

NM4: three-phase 230/400 V ± 10%.

Insulation class F.

Protection IP54

Motor 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.

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.

Impeller in chrome-nickel stainless steel AISI 316 for: NM 10.., NM 11.., NM 12...

Frequency 60 Hz (as per 60 Hz data sheet).

IP protection: IP55

Special mechanical seal

Motor suitable for operation with frequency converter up to 0,33 kW for NM4

and up to 0,75 kW for NM,NMD.

Higher or lower liquid or ambient temperatures.

- Cooling mixtures with temperatures from 0 to -30°C.

- Water with the temperature from 90° to 140°C.

- Oil with temperature up to 200°C and/or max density 30 cSt

Designation

Example: BNMD(4)M 20/140A/B

B = no indication: the pump is in the Cast Iron version

NM = Series

D = Double impeller

4 = 4-pole version (without indication, 2-pole version)

M = Single-phase version (no indication: three-phase)

20 = Delivery port diameter in mm

140 = Nominal impeller diameter

A = Impeller size

/B = It refers to a revision

The electropumps NM, B-NM series comply with the European

Regulation no. 547/2012.