NR Multi-row pumps
Design:
Single impeller centrifugal pumps with direct motor-pump connection and common shaft. The pump housing (multi-row version) has suction and delivery sockets of the same diameter and located on the same shaft.
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 household and industrial areas. If necessary, work with a reduced noise level (n = 1450 rpm). Use in heating, air conditioning, cooling and circulation installations.
Operating limits:
- Maximum allowable final pressure in the pump casing: 10 bar.
- Continuous operation.
- Fluid temperature from -10°С to +100°С.
- The ambient temperature is not more than 40°С.
- Manometric suction lift no more than 7 m.
Dimensions | Flange |
|---|---|
NR,NR4 50, NR,NR4 65 | Threaded flanges PN 16, EN 1092-1 |
NR4 80, NR4 100 | Lap Weld Flanges Standard |
NR4 125 | PN 10, EN 1092-1 |
Construction materials
Component | Material |
|---|---|
Pump housing | Cast iron GJL 200 EN 1561 |
Working wheel | Cast iron GJL 200 EN 1561 (Brass P-Cu Zn 40 Pb 2 UNI 5705 for NR 50) |
Shaft | Up to 1.1 kW - AISI 303 chrome steel |
Fur. seal | Charcoal - Ceramics - NBR |
Counter flanges | Steel Fe 42 UNI 7070 |
Special executions on request
- Other voltages - Frequency 60 Hz (see catalog for frequency 60 Hz)
- With protection device IP 55 - Special mech. seals
- For media with higher or lower temperatures.
Specifications:
n = 2900 rpm
|
n = 1450 rpm
|
