ed. 09/202

6

NR, NRS 60 H

z

Construction

NR, NR4 Close-coupled, single-impeller, centrifugal pumps; electricmotor wit

h

extended shaft directly connected to the pump

.

NRS Close-coupled centrifugal pumps, new bracket construction for standar

d

motors (stub-shaft construction) with integrated thrust bearing

.

NR, NR4 series: Single head electropumps

.

NRD, NRD4: Twin head pump with built-in automatic switching valve. The two

head can operate singularly or in parallel

.

Pump casing with suction and delivery connections with the same diameter an

d

on the same axis (in-line).

Connections: Flanges according to PN 10-16, EN 1092-2

.

Counter-flanges on request

.

Sizes

Flanges

NR,NR4 32,40,50,65,8

0

NRD, NRD4 50,65

Screwed flanges EN 1092-1, PN 1

6

NR 80

NR4 100, NR4 125

Flanges for welding EN 1092-1, PN 1

0

EN 1092-1, PN 10-16

Version with frequency converter (on request

)

Application

s

For clean liquids without abrasives, which are non-aggressive for the pum

p

materials ( solids content up to 0.2%)

.

For heating, air-conditioning, cooling and circulation plants

.

For civil and industrial applications

.

When low noise operation is required (n ≈ 1450 rpm)

.

Operating condition

s

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 (S3 60% for single-phase pump to 1,5 kW)

.

Motor

2-pole induction motor, 60 Hz (n ≈ 3450 rpm).

NR(D): three-phase 220/380 V, 220/440 V up to 3 kW

;

380/660 V, from 4 to 37 kW

;

NRM: single-phase 110 V, 127 V, 220 V.

with thermal protector up to 1.1 kW 220V only.

4-pole induction motor, 60 Hz (n ≈ 1750 1/min).

NR4: three-phase 220/380 V, 220/440, up to 3 kW;

380/660 V, from 4 to 5,5 kW

;

Insulation class F

.

Protection IP 54.

Motor suitable for operation with frequency converter from 0,37 kW for NR4 and

from 1,1 kW for NR(D).

IE3 e

fficiency class for three-phase motors (IE2 up to 0,65 kW)

.

Constructed in accordance with: EN 60034-1; EN 60034-30-1

.

EN 60335-1, EN 60335-2-41

.

Special features on reques

t

Other voltages.

Impeller in chrome-nickel stainless steel AISI 316. (from NR. 40.. to NR. 80..)

Protection IP 55.

Special mechanical sea

l

Higher or lower liquid or ambient temperatures

.

Motor suitable for operation with frequency converter up to 0,33 kW for NR(D)

4

and up to 0,75 kW for NR(D)

.

Designatio

n

Example: NR(D)(S)(4)(M) EI 50/125A/A-60

NR = Series

D = Twin hea

d

S = Series Version Stub-Shaf

t

4 = 4-pole version (without indication, 2-pole version)

M = Single-phase version (no indication: three-phase)

EI = With frequency converter I-MAT

50 = Delivery port diameter in m

m

125 = Nominal impeller diamete

r

A = Impeller diamete

r

/A = It refers to a revisio

n

60 = Frequency 60Hz

The electropumps comply with the European Regulation no. 547/2012.

Materials

Components

Materials

Pump casing

Cast iron GJL 200 EN 1561

Lantern bracket

Cast iron GJL 200 EN 1561

Impeller

Cast iron GJL 200 EN 1561 (Brass CW617N EN 12165 for NR-NR4 32..., 40..., 50/200, 50)

Shaft

Chrome-nickel steel 1.4305 EN 10088 (AISI 303)

Steel 1.4104 EN 10088 AISI 430F (NR 32/12, NR, NR4 50

)

Valve

Chrome-nickel steel AISI 304 - NB

R

Mechanical seal

Carbon - Ceramic - NBR

Counter-

flanges

Steel 1.0044 EN 10025-2 (Fe 430B)

139