43
N, N4
4
Construction
Single-stage end-suction
centrifugal pumps, with bearing
bracket.
Nominal duty points and main dimensions in accordance with
EN 733.
Back Pull-Out construction, for simple and quick dismantling
and reassembly.
N, N4: version with pump casing and lanter bracket in cast iron.
B-N, B-N4: version with pump casing and lanter bracket in bronze.
(the pumps are supplied fully painted).
Rated speed of rotation (50 Hz): N = 2900 rpm.
N4 = 1450 rpm.
Connections: PN 10 flanges EN 1092-2.
Counter-flanges (on request)
Sizes Flanges
from 32-160 to 50-250 Screwed flanges PN 16 EN 1092-1
from 65-125 to 150-400 Flanges for welding
PN 10 EN 1092-1
Shaft sealing
– Standardized mechanical seal in accordance with ISO 3069.
– Stuffing box seal (on request).
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 and for agriculture.
- 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.
Maximum permissible rotation speed: see table on page 52.
Pump-Motor unit
N,N4 pump connected to a standard electric motor in B3 construction
form (EN 60072-1), classification scheme EFF2 or
EFF1 (High efficiency) on request, IP 55 protection, three-phase
400 V , 50 Hz by means of a baseplate, driven by a flexible
coupling and with coupling protection.
Special features on request
- Special mechanical seal.
- Chrome-nickel steel AISI 316 pump-shaft.
- Higher or lower liquid or ambient temperatures.
- Other motor protection.
- Explosion proof construction in accordance with Directive 94/9
EEC (ATEX).
- Motor for other voltage.
- Frequency 60 Hz (as per 60 Hz data sheet).
Materials
Components N, N4 N, N4 B-N, B-N4
Mechanical seal Stuffing box Mechanical seal
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 32-125, 32-160, 32-200, 40-200
Shaft Chrome steel Carbon steel Cr-Ni-Mo steel
1.4104 EN 10088 C 40 UNI 7845 1.4401 EN 10088
(AISI 430) (AISI 316)
Shaft sleeve _ Bronze G-Cu Sn5 Zn5 Pb5 EN 1982 _
with chromate surface
Mechanical seal Carbon - Ceramic - NBR _ Carbon - Ceramic - NBR
Counter-flanges Steel Fe 430B UNI 7070
End-Suction Centrifugal Pumps
standardized EN 733
10/2010
