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NM, NMD0 pages
09/2013
NM, NMD
Close Coupled Centrifugal Pumps
with threaded ports
Construction
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).
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
The electropumps NM, B-NM series comply with the European Regulation no.
547/2012 in force starting from 01.01.2013.
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.
Materials
Components
Pump casing
Lantern bracket
NM, NMD
Cast iron
GJL 200 EN 1561
B-NM, B-NMD
Bronze
G-Cu Sn 10 EN 1982
Brass P- Cu Zn 40 Pb 2 UNI 5705
Cast iron
Bronze
GJL 200 EN 1561
G-Cu Sn 10 EN 1982
Impeller
NM 17
Shaft
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.
Cr steel AISI 430
Cr Ni Mo steel
Cr Ni steel AISI 303
AISI 316
1,1 -1,5 - 2,2 kW
Carbon - Ceramic - NBR
Mechanical seal
Coverage chart n ≈ 2900 rpm
5
4
130
U.S. g.p.m.
5
10
Imp. g.p.m.
20
30
10
20
40
30
50
100
40
50
200
100
300
200
400
300
400
NMD 32/210
100
H
300
NMD 25/190
m
NMD 40/180
200
NMD 20/140
50
NM 3
40
30
NM 20/160
NMD 20/110
NM 25/160
H
NM
12
NM 25/20
ft
100
NM 11
NM 2
20
NM 25/12
NM 1
50
NM 10
40
NM 17
10
30
20
5
4
1
m 3/h
Q l/min 30
2
40
3
50
4
5
6 7
100
8 9 10
150
200
20
300
400
30
500
40
50
1000
100
1500
72.820.C
7
1
"
