Construction
Close-coupled centrifugal pumps; electric motor with extended shaft directly connected to the pump up to 22 kW, new bracket construction for standard motors ( stub-shaft construction ) from 30 to 75 kW with integrated thrust bearing.
Pump casing with axial suction and radial delivery on top, main dimensions and performance according to EN 733.
NM(S): version with pump casing and lantern bracket in cast iron.
B-NM(S): version with pump casing and lantern bracket/casing cover in bronze. ( the pumps are supplied fully painted ).
Connections: Flanges according to PN 10, EN 1092-2.
Counter-flanges ( on request ) Flanges for welding EN 1092-1, PN 10.
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 NM 32L/16,20; NM 40/16,20; NM 50/12,16; NM 65/12,16,20,25; NM80/16; NM 100/20).
- Continuous duty.
Motor
- 2-pole induction motor, 50 Hz (n ≈ 2900 rpm).
- NM, NMS: three-phase 230/400 ±10% up to 3 kW;
400/690 V ±10% from 4 to 75 kW. - Insulation class F. Protection IP 54 ( IP 55 for NMS )
- Motor suitable for operation with frequency converter from 1,1 kW.
- Classification scheme IE3 for three-phase motors from 0,75 kW.
- Constructed in accordance with : EN 60034-1, EN 60034-30-1.
Special Features on request
- Other voltages. – Frequency 60 Hz ( as per 60 Hz data sheet ).
- Protection IP 55. – Special mechanical seal.
- Packed gland ( only for NM standard construction )
- Single-phase motor ( NMM ) up to 1,5 kW.
- Higher or lower liquid or ambient temperatures.
- Motor suitable for operation with frequency converter up to 0.75 kW.
Materials
| Components | NM, NMS | B-NM, B-NMS |
| Pump casing Latern Bracket NM Casing cover for NMS |
Cast iron GJL 200 EN 1561 |
Bronze G-Cu Sn 10 EN 1982 |
| Lantern Bracket NMS | Cast Iron GJL 200 EN 1561 | Cast Iron GJL 200 EN 1561 |
| Impeller | Cast Iron GJL 200 EN 1561 |
Bronze G-Cu Sn 10 EN 1982 |
| Brass P-Cu Zn 40 Pb 2 UNI 5705 for 32/12, 32/16, 32/20, 32L/20, 40/20 | ||
| Shaft | Cr-Ni steel AISI 303AISI 430 from 3 kW TO 22 kW | Cr Ni Mo steel AISI 316 |
| Mechanical seal | Carbon-Ceramic-NBR | |
| Counter-Flanges | Steel Fe 4308 UNI 7070 | |
Specifications
- Rated Power Motor Output : 1,1 kW, 1,5 HP
- Weight : 27 kg
