NM threaded connection
-1-80x80.jpg "NM threaded connection")
Design:
Monoblock centrifugal pumps with direct connection between the engine and the pump and a common shaft.
Bells: threaded UNI-ISO 228/1.
Series NM: one impeller.
NMD series: two impellers placed oppositely with balanced axial force.
Application:
Pumping of clean liquids that are not aggressive to materials and do not contain abrasive impurities from which the pump is made (solids content max. 0.2%).
Use in heating, air conditioning, cooling and circulation installations.
Use in household and industrial areas.
Use in fire fighting installations.
Irrigation.
Water supply.
Operating restrictions:
- Continuous operation.
- Fluid temperature from -10°C to +90°C.
- Ambient temperature not more than 40°C.
- Manometric suction lift max. 7 m.
- Maximum allowable final pressure in the pump housing: 10 bar (16 bar for pumps NMD 25/190, NMD 32/210, NMD 40/180).
| Component | NM, NMD | B-NM, B-NMD |
| pump housing | Cast iron GJL 200 EN 1561 | Bronze G-Cu Sn 10 EN 1982 |
| Connecting part | Cast iron GJL 200 EN 1561 | Bronze G-Cu Sn 10 EN 1982 |
| working wheel | Brass P-Cu Zn 40 Pb 2 UNI 5705 | Brass P-Cu Zn 40 Pb 2 UNI 5705 |
| Impeller NM17 | Cast iron GJL 200 EN 1561 | Bronze G-Cu Sn 10 EN 1982 |
| Shaft | Steel Cr AISI 430 | Steel Cr Ni Mo AISI 316 |
| Steel Cr Ni AISI 303 up to 1.1 - 1.5 - 2.2 kW | ||
| mechanical seal | Charcoal - Ceramics - NBR | |
n = 2900 rpm
|
-1-240x240.jpg "Pump Calpeda B-NM17/D/A")