24255 curve book - rapid allweiler curve book.pdf · version 1 - nt, nshd, nb & dv curve book:...

CURVE BOOKEND-SUCTION CENTRIFUGAL PUMPS TO EN733 (DIN 24255)

Version 1 - NT, NSHD, NB & DV Curve Book: Rapid Allweiler PumpsWhilst all care has been taken to ensure the accuracy of the information contained in this brochure was correct at the time of printing, please be advised we cannot be held responsible for any errors contained within and or changes that may have taken place. Dimensions contained within are for reference purpose only and should not be used for construction; certified drawings are available upon request. For confirmation of any information contained herewith please contact a member of our technical sales team.

WE HAVE ALL THE TICKS

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1

2 3 4 6 8 10 20 30 40 60 80 100

FLOW RATE [m3/h]

200 300 400 600 800 1000 16002

3

4

6

8

10

[m]

H

20

30

40

60

80

1450 rpm

HEA

D

25-160

25-200

32-160

32-200

40-200

2/25-2002/32-200

40-160

65-16080-160

50-160

100-200

80-200

65-200

50-200

100-250

80-250

65-250

40-25050-250

2/40-250

2/50-250

125-250150-250

200-25065-315

65-400

80-315

100-315

125-315

150-315

200-315

250-315

80-400100-400

125-400200-400

250-400125-400/1

150-400/1

10

20

30

40

100

160

70

2 3 4 6 8 10

FLOW RATE [m3/h]

20 60 100 200 300 400 700

25-160

25-200

32-160

32-200

40-200

2/25-200 2/32-200

40-160

65-16080-160

50-160

125-250

100-200

80-200

65-200

50-200

100-250

80-250

65-25040-250

50-250

2/40-250 2/50-250

2900 rpm

[m]

H

HEA

D

TOMBSTONE CURVES

Pg. no.

25-160 2 4225-200 3 432/25-200 4 4432-160 5 4532-200 6 462/32-200 7 4740-160 8 4840-200 9 4940-250 10 502/40-250 11 5150-160 12 5250-200 13 5350-250 14 542/50-250 15 5565-160 16 5665-200 17 5765-250 18 5865-315 19 65-400 2080-160 21 5980-200 22 6080-250 23 6180-315 24 80-400 25100-200 26 62100-250 27 63100-315 28100-400 29125-250 30 64125-315 31125-400 32125-400/1 33150-250 34150-315 35150-400/1 36200-250 37200-315 38200-400 39250-315 40250-400 41

Size

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

2

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 25mm25mm

1450 rpm

DIN 24 255NT 25-160

30%40%

40%

45%

45%

50%

50%

0 2 4 6 8 10Q (m3/hr)

HEAD

(m)

1

2

3

4

5

6

7

8

9

P (k

W)

0.00

0.10

0.20

0.30

NPSH

(m)

0

1

2

3

4

125

125

140

140

159

159

159

51.0%

Safety margin of 0,5 m necessary

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

3

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 25mm40mm

1450 rpm

DIN 24 255NT 25-200

10% 15%20%

25%27%

27%

0 1 2 3 4 5 6 7Q (m3/hr)

HEAD

(m)

4

8

12

16

P (k

W)

0.0

0.2

0.4

0.6

0.8

NPSH

(m)

0

2

4

6

160

160

160

180

180

190

190

190

198

198

205

205

205

29.0%

Safety margin of 0,5 m necessary

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

4

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 25mm40mm

1450 rpm

DIN 24 255NT 2/25-200

10% 15%20%

23%

23%

25%

25%

27%

27%

28%

28%

9630Q (m3/hr)

HEAD

(m)

5

10

15

20

25

P (k

W)

0.0

0.4

0.8

1.2

1.6

NPSH

(m)

1.00

1.20

1.40

1.60

145

145

145

165

165

165

185

185

185

205

205

205

29.0%

Safety margin of 0,5 m necessary

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

5

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 32mm50mm

1450 rpm

DIN 24 255NT 32-160

30% 42%

42%

50%

50%

55%

55%

58%

58%

0 5 10 15 20 25Q (m3/hr)

HEAD

(m)

1

2

3

4

5

6

7

8

9

10

11

12

P (k

W)

0.0

0.2

0.4

0.6

0.8

1.0

NPSH

(m)

0

1

2

3

4

125

125

125

140

140

160

160

170

170

170

61.0%

Safety margin of 0,5 m necessary

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

6

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 32mm50mm

1450 rpm

DIN 24 255NT 32-200

30% 40%

40%

47%

47%

50%

50%

0 4 8 12 16 20Q (m3/hr)

HEAD

(m)

4

6

8

10

12

14

16

P (k

W)

0.0

0.4

0.8

1.2

1.6

NPSH

(m)

0.0

0.5

1.0

1.5

2.0

2.5

160

160

160

175

175

195

195

205

205

205

54.0%

Safety margin of 0,5 m necessary

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

7

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 32mm50mm

1450 rpm

DIN 24 255NT/NS 2/32-200

30%35%

35%

40%

40%

45%

45%

47%

47%

02510150Q (m3/hr)

HEAD

(m)

5

10

15

20

25

P (k

W)

0.0

0.4

0.8

1.2

1.6

NPSH

(m)

0

1

2

3

145

145

165

165

185

185

205

205

205

48.0%

Safety margin of 0,5 m necessary

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

8

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 40mm65mm

1450 rpm

DIN 24 255NT/NS 40-160

40% 50%

50%

55%

55%

60%

60%

63%

63%

65%

65%

040302010Q (m3/hr)

HEAD

(m)

0

2

4

6

8

10

12

P (k

W)

0.0

0.4

0.8

1.2

1.6

NPSH

(m)

0

1

2

3

125

125

125

145

145

145

158

158

158

170

170

170

66.0%

Safety margin of 0,5 m necessary

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

9

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 40mm65mm

1450 rpm

DIN 24 255NT/NS 40-200

35% 45% 50%

50%

54%

54%

58%

58%

60%

60%

0 5 10 15 20 25 30Q (m3/hr)

HEAD

(m)

4

6

8

10

12

14

16

18

P (k

W)

0.0

0.4

0.8

1.2

1.6

2.0

NPSH

(m)

0

1

2

3

4

160

160

160

178

178

195

195

205

205

205

62.5%

Safety margin of 0,5 m necessary

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

10

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

30%

30%

40%

40%

45%

45%

50%

50%

55%

55%

0 5 10 15 20 25 30 35 40Q (m3/hr)

HEAD

(m)

0

5

10

15

20

25

P (k

W)

0

1

2

3

NPSH

(m)

0

2

4

6

8

10

200

200

200

225

225

225

250

250

250

60.0%

Safety margin of 0,5 m necessary

40mm65mm

1450 rpm

DIN 24 255NT/NS 40-250

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

11

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

30%

30%

40%

40%

45%

45%

50%

50%

54%

54%

0 10 20 30 40 50Q (m3/hr)

HEAD

(m)

5

10

15

20

25

30

35

40

P (k

W)

0

2

4

6

NPSH

(m)

0.0

0.5

1.0

1.5

2.0

2.5

175

175

195

195

215

215

235

235

256

256

256

56.0%

Safety margin of 0,5 m necessary

40mm65mm

1450 rpm

DIN 24 255NT/NS 2/40-250

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

12

30% 42% 52% 60%

60%

65%

65%

68%

68%

70%

70%

0 10 20 30 40 50Q (m3/hr)

HEAD

(m)

2

4

6

8

10

P (k

W)

0.0

0.4

0.8

1.2

1.6

NPSH

(m)

0

1

2

3

125

125

125

138

138

153

153

165

165

165

71.0%

Safety margin of 0,5 m necessary

50mm65mm

1450 rpm

DIN 24 255NT/NS 50-160

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

13

35% 45% 53% 60%

60%

64%

64%

68%

68%

70%

70%

0 10 20 30 40 50Q (m3/hr)

HEAD

(m)

5

10

15

20

P (k

W)

0.0

0.5

1.0

1.5

2.0

2.5

NPSH

(m)

0

1

2

3

4

160

160

160

178

178

191

191

205

205

205

71.0%

Safety margin of 0,5 m necessary

50mm65mm

1450 rpm

DIN 24 255NT/NS 50-200

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

14

35% 45% 55% 60%

60%

63%

63%

65%

65%

0 10 20 30 40 50Q (m3/hr)

HEAD

(m)

5

10

15

20

25

P (k

W)

0

1

2

3

4

5

NPSH

(m)

0

1

2

3

4

5

200

200

200

220

220

235

235

250

250

250

67.0%

Safety margin of 0,5 m necessary

50mm65mm

1450 rpm

DIN 24 255NT/NS 50-250

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

15

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

40%

40%

45%

45%

50%

50%

55%

55%

58%

58%

60%

60%

0 10 20 30 40 50 60Q (m3/hr)

HEAD

(m)

0

10

20

30

40

P (k

W)

0

2

4

6

NPSH

(m)

0

1

2

3

4

175

175

195

195

215

215

235

235

256

256

256

61.0%

Safety margin of 0,5 m necessary

50mm65mm

1450 rpm

DIN 24 255NT/NS 2/50-250

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

16

40% 50%

50%

60%

60%

65%

65%

70%

70%

0 10 20 30 40 50 60 70 80 90Q (m3/hr)

HEAD

(m)

1.0

1.9

2.8

3.7

4.6

5.5

6.4

7.3

8.2

9.1

10.0

P (k

W)

0.0

0.4

0.8

1.2

1.6

2.0

NPSH

(m)

0

2

4

6

8

10

125

125

125

135

135

135

145

145

145

160

160

160

170

170

170

72.0%

Safety margin of 0,5 m necessary

65mm80mm

1450 rpm

DIN 24 255NT/NS 65-160

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

17

40% 50% 60% 65%70%

70%

72%

72%

0 10 20 30 40 50 60 70Q (m3/hr)

HEAD

(m)

5

10

15

P (k

W)

0

1

2

3

NPSH

(m)

0

1

2

3

4

160

160

160

178

178

194

194

205

205

205

73.0%

Safety margin of 0,5 m necessary

65mm80mm

1450 rpm

DIN 24 255NT/NS 65-200

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

18

50%

50%

60%

60%

65%

65%

68%

68%

051001050Q (m3/hr)

HEAD

(m)

2

4

6

8

10

12

14

16

18

20

22

24

26

28

P (k

W)

0

2

4

6

8

10

NPSH

(m)

0

4

8

12

16

200

200

200

225

225

225

240

240

240

250

250

250

265

265

265

71.5%

Safety margin of 0,5 m necessary

65mm80mm

1450 rpm

DIN 24 255NT/NS 65-250

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

19

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

30% 40%

40%

50%

50%

55%

55%

60%

60%

62%

62%

65%

65%

0 20 40 60 80 100 120Q (m3/hr)

HEAD

(m)

0

10

20

30

40

P (k

W)

0

4

8

12

16

NPSH

(m)

0

2

4

6

8

10

270

270

270

290

290

310

310

320

320

330

330

330

67.0%

Safety margin of 0,5 m necessary

65mm80mm

1450 rpm

DIN 24 255NT/NS 65-315

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

20

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

40%

40%

50%

50%

53%

53%

55%

55%

30%

30%

0 10 20 30 40 50 60 70 80 90 100 110Q (m3/hr)

HEAD

(m)

10

20

30

40

50

60

70

P (k

W)

0

5

10

15

20

25

NPSH

(m) 8

10

330

330

330

350

350

350

370

370

370

390

390

390

410

410

410

56.1%

Safety margin of 0,5 m necessary

65mm80mm

1450 rpm

DIN 24 255NT/NS 65-400

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

21

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

50%

50%

60%

60%

70%

70%

75%

75%

78%

78%

0 10 20 30 40 50 60 70 80 90 100 110 120 130Q (m3/hr)

HEAD

(m)

1

2

3

4

5

6

7

8

9

10

11

P (k

W)

0

1

2

3

NPSH

(m)

0

4

8

12

125

125

125

140

140

140

160

160

160

170

170

170

180

180

180

80.5%

Safety margin of 0,5 m necessary

80mm100mm

1450 rpm

DIN 24 255NT/NS 80-160

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

22

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

40%

40%

50%

50%

60%

60%

65%

65%

70%

70%

051001050Q (m3/hr)

HEAD

(m)

2

4

6

8

10

12

14

16

P (k

W)

0

2

4

6

NPSH

(m)

0

2

4

6

8

10

170

170

170

185

185

200

200

210

210

210

73.0%

Safety margin of 0,5 m necessary

80mm100mm

1450 rpm

DIN 24 255NT/NS 80-200

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

23

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

40%

40%

50%

50%

60%

60%

65%

65%

70%

70%

72%

72%

0 40 80 120 160 200Q (m3/hr)

HEAD

(m)

4

8

12

16

20

24

28

P (k

W)

0

4

8

12

16

NPSH

(m)

0

4

8

12

16

200

200

200

225

225

225

245

245

245

265

265

265

75.0%

Safety margin of 0,5 m necessary

80mm100mm

1450 rpm

DIN 24 255NT/NS 80-250

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

24

CHARACTERISTIC CURVE

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

Discharge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

50%

50%

60%

60%

70%

70%

73%

73%

74%

74%

0 20 40 60 80 100 120 140 160 180Q (m3/hr)

HEAD

(m)

5

10

15

20

25

30

35

40

P (k

W)

0

4

8

12

16

20

NPSH

(m)

0

4

8

12

270

270

270

280

280

280

290

290

290

300

300

300

310

310

310

320

320

320

330

330

330

75.0%

Safety margin of 0,5 m necessary

80mm100mm

1450 rpm

DIN 24 255NT/NS 80-315

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

25

CHARACTERISTIC CURVE

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

Discharge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

40% 50% 55%

55%

60%

60%

63%

63%

65%

65%

67%

67%

002051001050Q (m^3/hr)

HEAD

(m)

10

20

30

40

50

60

P (k

W)

0

10

20

30

40

NPSH

(m)

0

4

8

12

330

330

330

350

350

370

370

370

390

390

409

409

409

68.0%

Safety margin of 0,5 m necessary

80mm100mm

1450 rpm

DIN 24 255NT/NS 80-400

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

26

CHARACTERISTIC CURVE

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

Discharge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

1450 rpm

40%

40%

50%

50%

60%

60%

70%

70%

80%

80%

0 50 100 150 200 250Q (m^3/hr)

HEAD

(m)

0

2

4

6

8

10

12

14

16

P (k

W)

0

2

4

6

8

NPSH

(m)

0

4

8

12

170

170

170

180

180

180

190

190

190

200

200

200

210

210

210

215

215

215

85.0%

Safety margin of 0,5 m necessary

100mm125mm

DIN 24 255NT/NS 100-200

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

27

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

50% 60%

60%

70%

70%

75%

75%

80%

80%

0 50 100 150 200 250Q (m3/hr)

HEAD

(m)

0

5

10

15

20

25

P (k

W)

0

4

8

12

16

NPSH

(m)

0

2

4

6

8

10

205

205

205

220

220

220

240

240

240

260

260

260

81.7%

Safety margin of 0,5 m necessary

100mm125mm

1450 rpm

DIN 24 255NT/NS 100-250

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

28

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

50%

50%

60%

60%

65%

65%

70%

70%

75%

75%

0 50 100 150 200 250 300Q (m3/hr)

HEAD

(m)

5

10

15

20

25

30

35

40

45

P (k

W)

0

10

20

30

NPSH

(m)

0

2

4

6

8

10

270

270

270

290

290

290

310

310

310

330

330

330

78.5%

Safety margin of 0,5 m necessary

100mm125mm

1450 rpm

DIN 24 255NT/NS 100-315

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

29

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

30% 40% 50% 60%

60%

65%

65%

70%

70%

0 50 100 150 200 250 300Q (m3/hr)

HEAD

(m)

20

30

40

50

60

P (k

W)

0

10

20

30

40

NPSH

(m)

0

2

4

6

8

350

350

350

370

370

390

390

409

409

409

72.5%

Safety margin of 0,5 m necessary

100mm125mm

1450 rpm

DIN 24 255NT/NS 100-400

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

30

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

40% 50%

50%

60%

60%

70%

70%

80%

80%

0040030020010Q (m3/hr)

HEAD

(m)

0

5

10

15

20

25

30

P (k

W)

0

5

10

15

20

25

NPSH

(m)

0

4

8

12

200

200

200

230

230

230

250

250

250

270

270

270

85.0%

Safety margin of 0,5 m necessary

125mm150mm

1450 rpm

DIN 24 255NT/NS 125-250

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

31

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

50%

50%

60%

60%

70%

70%

75%

75%

80%

80%

0040030020010Q (m3/hr)

HEAD

(m)

10

20

30

40

P (k

W)

0

10

20

30

40

NPSH

(m)

0

2

4

6

8

270

270

270

290

290

310

310

328

328

328

84.0%

Safety margin of 0,5 m necessary

125mm150mm

1450 rpm

DIN 24 255NT/NS 125-315

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

32

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

50% 60%

60%

65%

65%

70%

70%

73%

73%

75%

75%

0 50 100 150 200 250 300 350 400 450Q (m3/hr)

HEAD

(m)

10

20

30

40

50

60

P (k

W)

0

20

40

60

NPSH

(m)

0

4

8

12

330

330

350

350

370

370

390

390

408

408

77.0%

Safety margin of 0,5 m necessary

125mm150mm

1450 rpm

DIN 24 255NT/NS 125-400

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

33

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 1988 125mm150mm

1450 rpm

DIN 24 255NT/NS 125-400/1

40% 50% 60% 65% 70%

70%

73%

73%

75%

75%

77%

77%

0 100 200 300 400Q (m3/hr)

HEA

D (m

)

20

30

40

50

60

70

P (k

W)

0

20

40

60

80

NPS

H (m

)

0

2

4

6

8

330

330

330

360

360

360

390

390

390

405

405

405

420

420

420

77.4%

Safety margin of 0,5 m necessary

34

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

40% 50% 60% 70%

70%

75%

75%

80%

80%

0 100 200 300 400 500 600Q (m3/hr)

HEAD

(m)

5

10

15

20

25

P (k

W)

0

10

20

30

NPSH

(m)

0

2

4

6

8

10

*228 (220)

228

228

*245 (240)

245

260

260

280

280

280

82.1%

Safety margin of 0,5 m necessary

150mm200mm

1450 rpm

DIN 24 255NT/NS 150-250

*Shroud Ø (Reduced Vane Ø)

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

35

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

50% 60% 70%

70%

75%

75%

80%

80%

82%

82%

0 100 200 300 400 500 600Q (m3/hr)

HEAD

(m)

10

15

20

25

30

35

40

P (k

W)

0

10

20

30

40

50

NPSH

(m)

0

2

4

6

8

270

270

290

290

310

310

328

328

328

82.5%

Safety margin of 0,5 m necessary

150mm200mm

1450 rpm

DIN 24 255NT/NS 150-315

36

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

40% 50% 60% 70%

70%

75%

75%

80%

80%

82%

82%

0 100 200 300 400 500 600 700Q (m3/hr)

HEAD

(m)

20

30

40

50

60

70

P (k

W)

0

40

80

120

NPSH

(m)

0

2

4

6

8

10

350

350

350

370

370

370

400

400

400

420

420

420

83.3%

Safety margin of 0,5 m necessary

150mm200mm

1450 rpm

DIN 24 255NT/NS 150-400/1

37

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 200mm200mm

1450 rpm

DIN 24 255NT/NS 200-250

40% 50% 60%70%

75%78%

78%

80%

80%

0 100 200 300 400 500 600 700Q (m3/hr)

HEAD

(m)

8

12

16

20

24

28

P (k

W)

0

10

20

30

40

NPSH

(m)

0

2

4

6

8

10

250

250

250

270

270

290

290

290

81.0%

Safety margin of 0,5 m necessary

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

38

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

50% 60% 70%

70%

75%

75%

80%

80%

0 200 400 600 800 1000Q (m3/hr)

HEAD

(m)

10

14

18

22

26

30

34

38

42

P (k

W)

0

20

40

60

80

NPSH

(m)

0

2

4

6

8

*268 (253)

268

268

280

280

280

300

300

300

320

320

320

340

340

340

85.0%

Safety margin of 0,5 m necessary

200mm250mm

1450 rpm

DIN 24 255NT/NS 200-315

*Shroud Ø (Reduced Vane Ø)

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

39

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

35% 50% 60% 68% 75%

75%

80%

80%

0 100 200 300 400 500 600 700 800 900Q (m3/hr)

HEAD

(m)

0

10

20

30

40

50

60

70

P (k

W)

0

40

80

120

NPSH

(m)

0

2

4

6

8

10

300

300

300

350

350

350

385

385

385

420

420

420

83.0%

Safety margin of 0,5 m necessary

200mm250mm

1450 rpm

DIN 24 255NT/NS 200-400

40

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

50% 60%70%

70%

75%

75%

81%

81%

0 200 400 600 800 1000 1200 1400Q (m3/hr)

HEAD

(m)

10

20

30

40

50

P (k

W)

0

40

80

120

NPSH

(m)

0

4

8

12

*311 (291)

311

311

*322 (315)

322

335

335

355

355

355

84.0%

Safety margin of 0,5 m necessary

250mm300mm

1450 rpm

DIN 24 255NT/NS 250-315

*Shroud Ø (Reduced Vane Ø)

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

41

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

50%

50%

60%

60%

65%

65%

70%

70%

75%

75%

80%

80%

0 200 400 600 800 1000 1200 1400Q (m3/hr)

HEAD

(m)

0

10

20

30

40

50

60

70

P (k

W)

0

40

80

120

160

NPSH

(m)

0

2

4

6

8

*300 (290)

300

*320 (310)

320

*340 (335)

340

360

360

380

380

400

400

420

420

420

82.5%

Safety margin of 0,5 m necessary

*Shroud Ø (Reduced Vane Ø)

250mm300mm

1450 rpm

DIN 24 255NT/NS 250-400

42

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

30%40%

45%

45%

50%

50%

52%

52%

0 2 4 6 8 10 12 14 16 18Q (m3/hr)

HEAD

(m)

5

10

15

20

25

30

35

P (k

W)

0.0

0.4

0.8

1.2

1.6

2.0

NPSH

(m)

0

2

4

6

8

125

125

140

140

159

159

159

53.0%

Safety margin of 0,5 m necessary

25mm25mm

2900 rpm

DIN 24 255NT 25-160

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

43

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

10% 15% 20%24%

27%

27%

29%

29%

32%

32%

0 2 4 6 8 10 12Q (m3/hr)

HEAD

(m)

20

30

40

50

60

P (k

W)

0

1

2

3

4

5

NPSH

(m)

0.0

0.5

1.0

1.5

2.0

2.5

160

160

160

175

175

185

185

185

192

192

199

199

205

205

205

33.0%

Safety margin of 0,5 m necessary

25mm40mm

2900 rpm

DIN 24 255NT 25-200

44

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

10%15%

20%25%

25%

28%

28%

30%

30%

31%

31%

0 2 4 6 8 10 12 14 16 18Q (m3/hr)

HEAD

(m)

20

30

40

50

60

70

80

90

100

P (k

W)

0

2

4

6

8

NPSH

(m)

0

1

2

3

4

145

145

145

165

165

165

185

185

185

205

205

205

32.0%

Safety margin of 0,5 m necessary

25mm40mm

2900 rpm

DIN 24 255NT/NS 2/25-200

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

45

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 32mm50mm

2900 rpm

DIN 24 255NT/NS 32-160

30% 42%

42%

50%

50%

55%

55%

60%

60%

0 10 20 30 40 50Q (m3/hr)

HEAD

(m)

0

10

20

30

40

50

P (k

W)

0

2

4

6

8

NPSH

(m)

0

2

4

6

8

10

125

125

125

140

140

160

160

170

170

170

63.5%

Safety margin of 0,5 m necessary

46

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 32mm50mm

2900 rpm

DIN 24 255NT/NS 32-200

30% 40% 45%

45%

50%

50%

55%

55%

0 10 20 30 40 50Q (m3/hr)

HEAD

(m)

20

30

40

50

60

70

P (k

W)

0

2

4

6

8

10

NPSH

(m)

0

2

4

6

160

160

160

175

175

195

195

205

205

205

57.0%

Safety margin of 0,5 m necessary

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

47

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

30% 35%

35%

40%

40%

43%

43%

45%

45%

47%

47%

040302010Q (m3/hr)

HEAD

(m)

20

30

40

50

60

70

80

90

P (k

W)

0

4

8

12

NPSH

(m)

0

2

4

6

8

145

145

165

165

185

185

205

205

205

50.0%

Safety margin of 0,5 m necessary

32mm50mm

2900 rpm

DIN 24 255NT/NS 2/32-200

48

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

35% 47% 55%

55%

60%

60%

65%

65%

67%

67%

0 8 16 24 32 40 48 56 64 72Q (m3/hr)

HEAD

(m)

4

8

12

16

20

24

28

32

36

40

44

48

P (k

W)

0

2

4

6

8

10

NPSH

(m)

0

2

4

6

8

125

125

125

145

145

145

158

158

158

170

170

170

68.0%

Safety margin of 0,5 m necessary

40mm65mm

2900 rpm

DIN 24 255NT/NS 40-160

49

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 40mm65mm

2900 rpm

DIN 24 255NT/NS 40-200

35% 45% 50% 56%

56%

60%

60%

63%

63%

0 10 20 30 40 50 60Q (m3/hr)

HEAD

(m)

20

30

40

50

60

70

P (k

W)

0

4

8

12

16

NPSH

(m)

0

2

4

6

8

160

160

160

178

178

195

195

205

205

205

65.0%

Safety margin of 0,5 m necessary

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

50

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 40mm65mm

2900 rpm

DIN 24 255NT/NS 40-250

30% 40% 45%

45%

50%

50%

55%

55%

60%

60%

0 10 20 30 40 50 60 70Q (m3/hr)

HEAD

(m)

20

30

40

50

60

70

80

90

100

P (k

W)

0

5

10

15

20

25

NPSH

(m)

0

2

4

6

8

10

200

200

200

225

225

225

250

250

250

62.0%

Safety margin of 0,5 m necessary

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

51

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

30% 40%

40%

45%

45%

50%

50%

55%

55%

0 10 20 30 40 50 60 70 80 90Q (m3/hr)

HEAD

(m)

20

40

60

80

100

120

140

160

P (k

W)

0

10

20

30

40

50

NPSH

(m)

0

2

4

6

8

10

175

175

195

195

215

215

235

235

256

256

256

57.0%

Safety margin of 0,5 m necessary

40mm65mm

2900 rpm

DIN 24 255NT/NS 2/40-250

52

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

30% 45% 55% 60% 65%

65%

69%

69%

72%

72%

0 10 20 30 40 50 60 70 80 90Q (m3/hr)

HEAD

(m)

8

12

16

20

24

28

32

36

40

44

P (k

W)

0

2

4

6

8

10

NPSH

(m)

0

2

4

6

8

125

125

125

138

138

153

153

165

165

165

73.0%

Safety margin of 0,5 m necessary

50mm65mm

2900 rpm

DIN 24 255NT/NS 50-160

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

53

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

35% 50% 61%

61%

65%

65%

69%

69%

72%

72%

0 10 20 30 40 50 60 70 80 90 100Q (m3/hr)

HEAD

(m)

20

30

40

50

60

70

P (k

W)

0

4

8

12

16

20

NPSH

(m)

0

2

4

6

8

160

160

160

178

178

191

191

205

205

205

73.0%

Safety margin of 0,5 m necessary

50mm65mm

2900 rpm

DIN 24 255NT/NS 50-200

54

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

30% 40% 50% 57% 62% 65%

65%

68%

68%

0 10 20 30 40 50 60 70 80 90 100Q (m3/hr)

HEAD

(m)

30

40

50

60

70

80

90

100

P (k

W)

0

10

20

30

40

NPSH

(m)

0

2

4

6

8

10

200

200

200

220

220

235

235

250

250

250

69.0%

Safety margin of 0,5 m necessary

50mm65mm

2900 rpm

DIN 24 255NT/NS 50-250

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

55

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 50mm65mm

2900 rpm

DIN 24 255NT/NS 2/50-250

40%

40%

45%

45%

50%

50%

55%

55%

60%

60%

0 20 40 60 80 100 120Q (m3/hr)

HEAD

(m)

0

20

40

60

80

100

120

140

160

P (k

W)

0

10

20

30

40

50

NPSH

(m)

0

4

8

12

16

175

175

195

195

215

215

235

235

256

256

256

62.0%

Safety margin of 0,5 m necessary

56

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 65mm80mm

2900 rpm

DIN 24 255NT/NS 65-160

40% 50% 60%

60%

65%

65%

70%

70%

75%

75%

051001050Q (m3/hr)

HEAD

(m)

0

10

20

30

40

P (k

W)

0

4

8

12

16

NPSH

(m)

0

2

4

6

8

125

125

125

140

140

140

160

160

160

170

170

170

80.0%

Safety margin of 0,5 m necessary

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

57

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

35% 45% 55% 65% 70%

70%

73%

73%

0 25 50 75 100 125 150Q (m3/hr)

HEAD

(m)

20

24

28

32

36

40

44

48

52

56

60

P (k

W)

0

5

10

15

20

25

NPSH

(m)

0

2

4

6

8

160

160

160

178

178

194

194

205

205

205

75.0%

Safety margin of 0,5 m necessary

65mm80mm

2900 rpm

DIN 24 255NT/NS 65-200

58

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 65mm80mm

2900 rpm

DIN 24 255NT/NS 65-250

50% 60%

60%

65%

65%

70%

70%

0 20 40 60 80 100 120 140 160 180 200 220 240Q (m3/hr)

HEAD

(m)

20

30

40

50

60

70

80

90

100

110

P (k

W)

0

20

40

60

80

NPSH

(m)

0

4

8

12

16

200

200

200

225

225

225

240

240

240

250

250

250

265

265

265

73.5%

Safety margin of 0,5 m necessary

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

59

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

50% 60%

60%

70%

70%

75%

75%

78%

78%

0 20 40 60 80 100 120 140 160 180 200 220 240Q (m3/hr)

HEAD

(m)

0

4

8

12

16

20

24

28

32

36

40

44

P (k

W)

0

5

10

15

20

25

NPSH

(m)

0

4

8

12

16

125

125

125

140

140

140

160

160

160

170

170

170

180

180

180

80.0%

Safety margin of 0,5 m necessary

80mm100mm

2900 rpm

DIN 24 255NT/NS 80-160

60

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

40% 50% 60% 65%

65%

70%

70%

75%

75%

0 50 100 150 200 250Q (m3/hr)

HEAD

(m)

10

20

30

40

50

60

70

P (k

W)

0

10

20

30

40

NPSH

(m)

0

4

8

12

170

170

170

185

185

200

200

210

210

210

80.0%

Safety margin of 0,5 m necessary

80mm100mm

2900 rpm

DIN 24 255NT/NS 80-200

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

61

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

40% 50% 55% 60% 65%70%

70%

72%

72%

0 40 80 120 160 200 240 280Q (m3/hr)

HEAD

(m)

20

40

60

80

100

120

P (k

W)

0

20

40

60

80

NPSH

(m)

0

4

8

12

200

200

200

225

225

225

245

245

245

265

265

265

75.0%

Safety margin of 0,5 m necessary

80mm100mm

2900 rpm

DIN 24 255NT/NS 80-250

62

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005 100mm125mm

2900 rpm

DIN 24 255NT/NS 100-200

40% 50% 60%

60%

70%

70%

75%

75%

80%

80%

0 50 100 150 200 250 300 350Q (m3/hr)

HEAD

(m)

0

10

20

30

40

50

60

P (k

W)

0

20

40

60

NPSH

(m)

0

4

8

12

170

170

170

180

180

180

190

190

190

200

200

200

210

210

210

215

215

215

81.2%

Safety margin of 0,5 m necessary

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

63

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

40% 50% 60% 70%

70%

75%

75%

0040030020010Q (m3/hr)

HEAD

(m)

20

30

40

50

60

70

80

90

100

P (k

W)

0

20

40

60

80

100

NPSH

(m)

0

4

8

12

205

205

205

220

220

220

240

240

240

260

260

260

76.6%

Safety margin of 0,5 m necessary

100mm125mm

2900 rpm

DIN 24 255NT/NS 100-250

EN733 (DIN 24255)END-SUCTION CENTRIFUGAL PUMPS

64

1973 Annex BBased on water density 1000 kg/m3 and viscosity 1 cSt.

CHARACTERISTIC CURVEDischarge Diameter

Head, capacity and efficiency according to ISO Standard 2548:

Issue Date Suction DiameterOCTOBER 2005

40%

40%

50%

50%

60%

60%

65%

65%

70%

70%

0 100 200 300 400 500 600 700Q (m3/hr)

HEAD

(m)

0

10

20

30

40

50

60

70

P (k

W)

0

20

40

60

80

NPSH

(m)

0

10

20

30

*185 (180)

185

185

200

200

220

220

220

74.0%

Safety margin of 0,5 m necessary

125mm150mm

2900 rpm

DIN 24 255NT/NS 125-250

*Shroud Ø (Reduced Vane Ø)

Centrifugal and Axial Flow Pump Affinity Laws:

Speed changes & impeller diameter remains the same:

Q1/Q2 = N1/N2

H1/H2 = (N1/N2)²

P1/P2 = (N1/N2)³

Impeller diameter changes and speed remains the same:

Q1/Q2 = D1/D2

H1/H2 = (D1/D2)²

P1/P2 = (D1/D2)³

BASIC FORMULAS Q = Flow(m³/h)H= Head(m) Density = SGEff = Pump Eff%

Capacity

l/sec x 3.6 = m³/h m³/h ÷ 3.6 = l/sec

US gpm ÷ 0.246 = l/min l/min x 0.246 = US gpm

Imp gpm x 0.2271 = m³/h m³/h x 4.403 = Imp gpm

10000 kg/hr =10m³h

Density(SG)

Head/Pressure

Ft ÷ 3.28 = m m x 3.28048 = Ft

m x 9.805 = kpa kpa x 0.102 = m

m x 1.45 = psi

Bar x 10.19 = m

Bar x 100 = kpa

m x 0.098 = Bar

psi x 6.895 = kpa

Efficiency

EFF(%) = Q x H x SG

367 x kw(abs)

Q x H x SG367 x Eff(%)

Power

hp x 0.746 = kw kw x 1.340483 = hp

kw abs =

Hz x 120No of Poles

RPM =

RPM x No Of Poles120

Hz =

Q x 353.63(Pipe Dia)²

Velocity m/sec =

Amps x Volts x Power Factor x 1.7321000

kw =

Temperature

Deg.C = (deg.F-32) x 0.556

Deg.F = (1.8 x deg.C) + 32

imp.dia.(mm) x π x N(Rpm)60 x 1000

Peripheral Speed

Peripheral Speed(Impeller) =

QvisCQ

Qw =

C% x %wQw =

Qvis x Hvis x Pvis367 x Eff(%) vis

Pvis =

HvisCH

Hw =

Viscosity

vis Viscous Liquid

w Water

Given: Qvis in m³/h

Hvis in m

kinematic viscosity v in mm²/s

pvis in kg/dm³

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