100

36

2 250 2500

NRG NOS

Qm3/h

Hm

NRG

1

•  Housing-  Low pressure heating systems.-  Chilled water systems.-  Cooling systems.-  Recycling loop...

•  Industriy-  Cold water, clear, neutral, and low viscosity liquids...

OPERATING LIMITSCapacities up to :  250 m3/hHeads up to :  36 mMax. operating pressure :  10 barTemperature range :  –8° à +100°CND of ports :  32 à 150+ 130 °C with special mechanical seal.

APPLICATIONS

AdVANTAGES

•  Pump bearing with sleeve bearings (the only one available on the market) for ex-tremely silent pump unit operation.

•  Cast base provides optimum absorption of vibrations.

•  Mechanical  seal: no  leaks, no mainte-nance during operation.

•  Reduced monitoring and maintenance requirements.

•  Traditional equipment, tested quality.

•  Interchangeability  with  installed pumps.

HORIZONTAL PUMPSHeating - Air conditioning

Secondary hot waterStandard line

50 Hz

N.T. N° 125-1/ENG. - Ed.8/11-10

• NRG 1222 - A2C bearing, ND 125.

• NRG 686, A1C bearing, ND 65

• Oil-lubricated sleeve bearings with visual check of level • Optional mechanical seal for + 130 °CGraphite/Carbide/EP

NRG

2

dESIGN•  Hydraulic part- Centrifugal, horizontal shaft, single-stage 1).-  Axial suction, radial discharge upward.-  Pedestal  bearing  fitted  with  oil  lubricated sleeve bearings  (not  included),  as well  as filler and level check plugs.-  Mechanical seal.-  Pump connected to motor by spring coupling provided with a guard.

•  MotorStandardized, with selected ball-bearings.Reserve power (in 50% of cases) extending the service life of the unit without increasing power consumption.

Vitesse :  1450 rpmWinding ≤ 4 kW :  230-400 V  > 4 kW : 400 V ∆Frequency :  50 Hz  (option 60 Hz)Insulation class :  155 (F)Protection index :  IP 44EC conformity :  EN 809

STANdARd CONSTRUCTIONMain parts MaterialPump casing Cast iron FGL 250Discharge end Cast iron FGL 250Closed, radial impeller Cast iron FGL 250Oil lubricated bearing Cast iron FGL 250Pump shaft Steel X30 Cr 13Sleeve bearings Cast iron or BronzePump sleeve bearings  Ceramic

Casing gasket Ethylene-Propylene

Mechanical seal Graphite/Ceramic/EP

1) NRG 781 and 782 pump with 2 impellers..

SECTIONAL dRAWING

• 1111A - Pump casing• 1222A - End cover with seal• 2110A - Pump shaft• 2250A - Closed radial impeller• 2520A - Locating ring• 2530A - Stop ring• 2912A - Lock nut• 3011A - Ball bearing• 3110A - Pedestal bearing• 3244A - Ball-bearing housing• 3245A - Sleeve bearing support• 3300A - Pump sleeve bearing• 3300B - Sleeve bearing• 3300C - Friction ring• 3712A - Ball-bearing nut• 3861A - Lubrication ring• 4213A - Ring support• 4220A - Rotary ring support         mechanical• 4240A - Stationary ring                 seal• 4590A - Gasket under plug 9621A• 4590B - Gasket under plug 9621B• 4590C - Gasket under plug 9621C• 4590D - Gasket under plug 9621D• 4590E - Gasket (ball-bearing box)• 4590F - Gasket (ring support)

• 4610A - O-ring (casing/end)• 4610B - O-ring (sleeve bearing/bearing)• 4610C - O-ring (ring support)• 4610D - Deflector• 6545A - Stop circlip• 6700A - Impeller key• 6700B - Coupling key• 9322A - Connecting strip• 9621A - Plug (pressure gauge)• 9621B - Plug (casing drain)• 9621C - Plug (bearing oil filling)• 9621D - Plug (oil drain)• 9900A - Special rod screw• 9901A - Flat head screw• 9906A - Hexagonal screw• 9908A - Screw (deflector)• 9914A - Screw (sleeve bearing)• 9921A - Impeller lock nut• 9923A - Nut (stud 9951a)• 9923B - Nut (stud 9951b)• 9929A - Impeller nut• 9951A - Stud (pump casing)• 9951B - Stud (bearing)  (•) Recommended spare parts

}

NRG

3

SECTIONAL dRAWINGS 

BEARINGA1C - A2C

BEARINGA3C

3

1 2 3 4 5 10 20 30 40 50

4 5 6 8 97 10 14 16 1812 20 24 30 40 50 60 8070 100 120 140 160 180 200 300

4000300020001000500400300200100 5000

40

30

24

20

17

15

12

10

9

8

7

6

5

4

3

2

20 30 40 50 100 200 300 400 500

100

90

80

70

60

50

45

40

35

30

25

20

15

10

8

100010

311

312

313

314

631

632

634

635

637

644

647

682

683

688

812

814

816

818

B649

B6410

B6411

686

781

1142

1144

1061

1062

1064

1222

1224

1226

1242

1244

1261

1262

1263

1282

1283

1286

15211522

1523

1525

1526

1581

1582

NRG4 POLES - 50 Hz

Imp.gpm

Hm

Qm3/h

Ql/minQl/s

Hft

NRG

4

GENERAL SELECTION GRAPH AT 1450 RPM

FEATURESa) Electrical data-  Complete unit with electrical motor :•  Three-phase 230-400 V - 50 Hz ≤ 4 kW,•  Three-phase 400 V - 50 Hz > 4 kW.-  Motor must be protected by circuit breake.

b) Installation-  On level foundation.-  Attached to base.

-  Connection  to  installation:  welded  round PN10 counter-flanges (screw-on for models NRG 311 to 314).

c) Packaging-  Supplied  with  gaskets  and  bolts,  without counter-flanges (optional).

d) Maintenance-  Repair:  see  recommended  spare  parts  (•) subject to wear.

ACCESSORIES •  Motor protection circuit breaker.•  Pressure gauge kit.•  Round, screw-on or welded counterflanges.•  Isolating valves.•  Check valves.•  Anti-vibration sleeves.

Brides asp.ref. - PN10 à portée de joint 

dN d c g trousmm mm mm n x Ø

32 140 100 78 4 x 1840 150 110 88 4 x 1850 165 125 102 4 x 1865 185 145 122 4 x 1880 200 160 138 8 x 18100 220 180 158 8 x 18125 250 210 184 8 x 18150 285 240 212 8 x 22

NRG

5

Suct.-disch. flanges - PN10 with gasket contact face

Nd d c g holes

ELECTRICAL dATA ANd dIMENSIONS

• For 3-phase 230-400 V motors ≤ 4 kW: star or delta connection.•  For 3-phase 400 V ∆ > 4 kW: star-delta connection.

Order reference Bearing power Full-load 

Current in A Ports L H a L1 B2 S1 H1 P1* X L2 L3 B3 Ød h drain port mass ± Counter-

flange to be order for pipe Ø

P2 suct. disch.kW 3~230V 3~400V NDS NDD mm mm mm mm mm mm mm mm mm mm mm mm mm mm F kg

NRG 311 A0C 0,75 3,45 2 32 32 613 315 70,5 600 300 205 165 0 27 80 315 265 16 30 1/4” 5133-42

(screw on)NRG 312 A0C 0,75 3,45 2 32 32 613 315 70,5 600 300 205 165 0 27 80 315 265 16 30 1/4” 51NRG 313 A0C 0,75 3,45 2 32 32 613 315 70,5 600 300 205 165 0 27 80 315 265 16 30 1/4” 51NRG 314 A0C 0,75 3,45 2 32 32 613 315 70,5 600 300 205 165 0 27 80 315 265 16 30 1/4” 51NRG 631 A0C 0,75 3,45 2 65 65 634 345 83 621 300 225,5 165 0 27 80 315 265 16 30 1/4” 61

66-76NRG 632 A0C 0,75 3,45 2 65 65 634 345 83 621 300 225,5 165 0 27 80 315 265 16 30 1/4” 61NRG 634 A0C 0,75 3,45 2 65 65 634 345 83 621 300 225,5 165 0 27 80 315 265 16 30 1/4” 61NRG 635 A0C 0,75 3,45 2 65 65 634 345 83 621 300 225,5 165 0 27 80 315 265 16 30 1/4” 61NRG 637 A0C 0,75 3,45 2 65 65 634 345 83 621 300 225,5 165 0 27 80 315 265 16 30 1/4” 61NRG 644 A0C 1,5 6,6 3,8 65 65 696 385 110 646 300 251 165 0 60 80 315 265 16 30 1/4” 80

66-76NRG 647 A0C 1,5 6,6 3,8 65 65 696 385 110 646 300 251 165 0 60 80 315 265 16 30 1/4” 80NRG 682 A1C 3 17,8 6,8 65 65 847 465 110 770 330 265 195 0 74 80 425 295 16 30 1/4” 150

66-76NRG 683 A1C 3 17,8 6,8 65 65 847 465 110 770 330 265 195 0 74 80 425 295 16 30 1/4” 150NRG 686 A1C 3 17,8 6,8 65 65 847 465 110 770 330 265 195 0 74 80 425 295 16 30 1/4” 150NRG 688 A1C 4 15,8 9,6 65 65 845 465 110 770 330 265 195 0 79 80 425 295 16 30 1/4” 162NRG 781 A3C 5,5 - 12 70 70 1343 553 175 1340 450 490 303 0 0 190 660 400 24 53 1/2” 250 66-76NRG 812 A0C 0,75 3,45 2 80 80 672 365 101 659 300 264 165 0 27 80 315 265 16 30 1/2” 67

82-89NRG 814 A0C 0,75 3,45 2 80 80 672 365 101 659 300 264 165 0 27 80 315 265 16 30 1/2” 67NRG 816 A0C 1,5 6,6 3,8 80 80 709 365 101 659 300 264 165 0 60 80 315 265 16 30 1/2” 72NRG 818 A0C 1,5 6,6 3,8 80 80 709 365 101 659 300 264 165 0 60 80 315 265 16 30 1/2” 72NRG B649 A1C 1,5 6,6 3,8 80 65 763 415 110 763 330 258 195 0 0 80 425 295 16 30 1/4” 90 82-89

and66-76

NRG B6410 A1C 1,5 6,6 3,8 80 65 763 415 110 763 330 258 195 0 0 80 425 295 16 30 1/4” 90NRG B6411 A1C 3 6,8 3,8 80 65 764 415 110 763 330 258 195 0 4 80 425 295 16 30 1/4” 110NRG 1142 A1C 4 15,8 9,6 100 80 873 455 130 798 330 293 195 0 79 80 425 295 16 30 1/4” 157 102-114

and 82-89NRG 1144 A1C 4 15,8 9,6 100 80 873 455 130 798 330 293 195 0 79 80 425 295 16 30 1/4” 157   *  Please note dimension P1 If P1 = 0 (zero) the discharge side axis is 

brought within the suction side axis.

holes

NDS

NDD

Brides asp.ref. - PN10 à portée de joint 

dN d c g trousmm mm mm n x Ø

32 140 100 78 4 x 1840 150 110 88 4 x 1850 165 125 102 4 x 1865 185 145 122 4 x 1880 200 160 138 8 x 18100 220 180 158 8 x 18125 250 210 184 8 x 18150 285 240 212 8 x 22

NRG

6

Suct.-disch. flanges - PN10 with gasket contact face 

Nd d c g holes

Order reference Bearing power Full-load  

current in A Ports L H a L1 B2 S1 H1 P1* X L2 L3 B3 Ød h drain port mass ± Counter-

flange to be order for pipe Ø

P2 suct. disch.kW 3~230V 3~400V DNA DNR mm mm mm mm mm mm mm mm mm mm mm mm mm mm F kg

NRG 1061 A2C 4 15,8 9,6 100 100 935 505 128 860 375 310 235 105 64 100 450 340 16 30 3/8” 199102-114NRG 1062 A2C 4 15,8 9,6 100 100 935 505 128 860 375 310 235 105 64 100 450 340 16 30 3/8” 199

NRG 1064 A2C 5,5 – 12 100 100 1087 530 128 960 405 335 260 105 119 100 525 370 16 30 3/8” 200NRG 1222 A1C 1,5 6,6 3,8 125 125 790 415 125 790 330 285 195 650 0 80 425 295 16 30 3/8” 92

127-140NRG 1224 A1C 3 11,8 6,8 125 125 864 415 125 790 330 285 195 650 74 80 425 295 16 30 3/8” 130NRG 1226 A1C 3 11,8 6,8 125 125 864 415 125 790 330 285 195 650 74 80 425 295 16 30 3/8” 130NRG 1242 A2C 4 15,8 9,6 125 125 945 515 134 870 375 320 235 115 64 100 450 340 16 30 3/8” 192

127-140NRG 1244 A2C 5,5 – 12,1 125 125 1097 540 134 970 405 345 260 115 119 100 525 370 16 30 3/8” 198NRG 1261 A2C 7,5 – 16 125 100 1097 540 134 970 405 345 260 130 119 100 525 370 16 30 3/8” 250 127-140

and102-114

NRG 1262 A2C 7,5 – 16 125 100 1097 540 134 970 405 345 260 130 119 100 525 370 16 30 3/8” 250NRG 1263 A2C 11 – 22 125 100 1262 563 134 1265 450 415 283 130 0 190 660 400 24 53 3/8” 280NRG 1282 A3C 11 – 22 125 100 1397 623 140 1400 490 450 303 155 0 210 740 440 24 53 3/8” 340 127-140

and102-114

NRG 1283 A3C 11 – 22 125 100 1397 623 140 1400 490 450 303 155 0 210 740 440 24 53 3/8” 352NRG 1286-T36 A3C 18,5 – 37 125 100 1397 623 140 1400 490 450 303 130 0 210 740 440 24 53 3/8” 360NRG 1521 A3C 7,5 – 16,4 150 150 1298 603 160 1295 450 445 303 130 0 190 660 400 24 53 3/8” 238

150-159NRG 1522 A3C 7,5 – 16,4 150 150 1298 603 160 1295 450 445 303 130 0 190 660 400 24 53 3/8” 238NRG 1523 A3C 7,5 – 16,4 150 150 1298 603 160 1295 450 445 303 130 0 190 660 400 24 53 3/8” 238NRG 1525-T36 A3C 15 – 29,5 150 150 1453 603 160 1415 490 465 303 130 410 210 740 440 24 53 3/8” 334NRG 1526-T36 A3C 15 – 29,5 150 150 1453 603 160 1415 490 465 303 130 410 210 740 440 24 53 3/8” 334NRG 1581-T36 A3C 22 – 43,5 150 125 1464 623 146 1410 490 460 303 170 570 210 740 440 24 53 3/8” 447 150-159 and 

127-140NRG 1582-T36 A3C 22 – 43,5 150 125 1464 623 146 1410 490 460 303 170 570 210 740 440 24 53 3/8” 447   *  Please note dimension P1 If P1 = 0 (zero) the discharge side axis is 

brought within the suction side axis.

ELECTRICAL dATA ANd dIMENSIONS

• For 3-phase 230-400 V motors up to 4 kW: star or delta connection.•  For 3-phase 400 V ∆ > 4 kW: star-delta connection.

holes

NDS

NDD