Construction Close-coupled centrifugal pumps; electric motor with extended shaft directly connected to the pump. Pump casing with axial suction and radial delivery on top, main dimensions and perfor- mance according to EN 733 with additional sizes for completion. Connections Sizes Connections NM4 25/125, 25/160, 25/200 Threaded ports ISO 228 from NM4 32/16 to NM4 150/400 Flanges according to PN 10, EN 1092-2 Counter-flanges (on request) Sizes Flanges from NM4 32/16 to NM4 50/25. Screwed flanges EN 1092-1, PN 16 from NM4 32/16 to NM4 150/400 Flanges for welding EN 1092-1, PN 10 Applications - For clean liquids without abrasives, which are non-aggressive for the pump materials (contents of solids up to 0.2%). - For water supply. - For heating, air conditioning, cooling and circulation plants. - For civil and industrial applications. - When low noise operating is required. - 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. Continuous duty. Motor 4-pole induction motor, 60 Hz (n = 1750 rpm). NM4: three-phase 220/380 V, 380/660 V. Insulation class F. Protection IP 54. Constructed in accordance with IEC 60034. Special features on request - Other voltages. - Protection IP 55. - Bronze impeller. - Special mechanical seal. - Higher or lower liquid or ambient temperatures. 29 Close Coupled Centrifugal Pumps NM4 NM4 60 Hz 60 Hz Coverage chart n = 1750 rpm 6 7 8 910 20 30 40 50 100 5 10 NM4 25/200 NM4 NM4 25/160 NM4 25/125 NM4 32/16 NM4 40/16 NM4 50/16 NM4 65/16 NM4 80/16 NM4 100/20 NM4 125/250 NM4 100/25 NM4 100/315 NM4 125/315 NM4 150/315 NM4 100/400 NM4 125/400 NM4 150/400 NM4 80/20 NM4 80/25 NM4 80/315 NM4 80/400 NM4 65/20 NM4 65/25 NM4 65/31 NM4 50/20 NM4 50/25 NM4 40/20 NM4 40/25 NM4 32/20 20 H m 30 40 50 100 150 Q m /h l/min 300 400 500 1000 20 30 50 100 200 300 40 30 40 50 U.S. g.p.m. Imp. g.p.m. 100 200 300 400 40 50 H ft 100 200 20 30 200 300 400 2000 3000 4000 5000 500 1000 400 500 1000 2000 500 3 4 7 10 2 10 10 20 2 3 3 4 30 50 5 80 1.5 10000 2000 3000 700 70 72.822.C 3 Materiali Components NM4 B-NM4 Pump casing Cast iron Bronze Lantern bracket GJL 200 EN 1561 G-Cu Sn 10 EN 1982 Impeller Cast iron Bronze GJL 200 EN 1561 G-Cu Sn 10 EN 1982 Brass P- Cu Zn 40 Pb 2 UNI 5705 For NM4 25/125 - 25/160 - 25/200 NM4 32/16 - 32/20 - 40/20 Shaft Cr Ni steel AISI 303 up to 1,1 kW Cr Ni Mo steel Cr steel AISI 430 AISI 316 from 1,5 kW to 75 kW Mechanical seal Carbon - Ceramic - NBR Counter-flanges Steel Fe 430B UNI 7070
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NM4 60 Hz Close Coupled Centrifugal Pumps · Close-coupled centrifugal pumps; electric motor with extended ... For NM4 25/125 - 25/160 - 25/200 NM4 32/16 - 32/20 - 40/20 Shaft Cr
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ConstructionClose-coupled centrifugal pumps; electric motor with extendedshaft directly connected to the pump. Pump casing with axialsuction and radial delivery on top, main dimensions and perfor-mance according to EN 733 with additional sizes for completion.
ConnectionsSizes ConnectionsNM4 25/125, 25/160, 25/200 Threaded ports ISO 228from NM4 32/16 to NM4 150/400 Flanges according to PN 10, EN 1092-2
Counter-flanges (on request)Sizes Flangesfrom NM4 32/16 to NM4 50/25. Screwed flanges EN 1092-1, PN 16from NM4 32/16 to NM4 150/400 Flanges for welding EN 1092-1, PN 10
Applications- For clean liquids without abrasives, which are non-aggressive
for the pump materials (contents of solids up to 0.2%).- For water supply.- For heating, air conditioning, cooling and circulation plants.- For civil and industrial applications.- When low noise operating is required.- 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.Continuous duty.
Motor4-pole induction motor, 60 Hz (n = 1750 rpm).NM4: three-phase 220/380 V, 380/660 V.Insulation class F.Protection IP 54.Constructed in accordance with IEC 60034.
Special features on request- Other voltages. - Protection IP 55.- Bronze impeller. - Special mechanical seal.- Higher or lower liquid or ambient temperatures.
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Close Coupled Centrifugal PumpsNM4NM4 60 Hz60 Hz
Coverage chart n = 1750 rpm
6 7 8 9 10 20 30 40 50 100
5
10
NM4 25/200
NM4
NM4 25/160
NM4 25/125
NM4 32/16 NM4 40/16 NM4 50/16 NM4 65/16
NM4 80/16
NM4 100/20
NM4 125/250
NM4 100/25
NM4 100/315NM4 125/315
NM4 150/315
NM4 100/400 NM4 125/400NM4 150/400
NM4 80/20
NM4 80/25
NM4 80/315
NM4 80/400
NM4 65/20
NM4 65/25
NM4 65/31
NM4 50/20
NM4 50/25
NM4 40/20
NM4 40/25
NM4 32/20
20
Hm
30
40
50
100 150Q m /h
l/min 300 400 500 1000
20 30 50 100 200 30040
30 40 50U.S. g.p.m.
Imp. g.p.m.
100 200 300 400
40
50
Hft
100
200
20
30
200 300 400
2000 3000 4000 5000
500 1000400
500 1000 2000
500
3
4
7
10
2
10
10 20
2 33 4
30 50
5
80
1.5
10000
2000
3000
700
70
72.822.C
3
MaterialiComponents NM4 B-NM4Pump casing Cast iron BronzeLantern bracket GJL 200 EN 1561 G-Cu Sn 10 EN 1982
Impeller Cast iron BronzeGJL 200 EN 1561 G-Cu Sn 10 EN 1982
Brass P- Cu Zn 40 Pb 2 UNI 5705For NM4 25/125 - 25/160 - 25/200
NM4 32/16 - 32/20 - 40/20Shaft Cr Ni steel
AISI 303 up to 1,1 kW Cr Ni Mo steelCr steel AISI 430 AISI 316
from 1,5 kW to 75 kWMechanical seal Carbon - Ceramic - NBRCounter-flanges Steel Fe 430B UNI 7070