Medium pressure boiler feed water pump

Medium pressure boiler feed water pump

Application:

Pump is multi-stage sectional centrifugal pump for medium pressure boiler water supply, also can be used for conveying similar liquid medium;

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Medium pressure boiler feed water pump Details

Performance range:
Flow: Q=3.8~180m3/h
Head: H=75-700m
Medium Temperature: T≤105℃

Structure:
DG Medium pressure boiler feed water pump  inlet is horizontal direction,Exports are vertical, or import and export are vertical or pump,ZDG Pump import and export are vertical.

Shaft Seal:
Using Packing seal or Mechanical seal, and need Cooling water.

Bearing and balancing device:
Pump rotor pump shaft at both ends of the Rolling bearing support, dilute oil lubrication, water cooling.The axial thrust of the rotor is balanced by the balance disc, and the equilibrium return water  is returned to the suction section of the pump .

Transmission:
The water pump through the elastic coupling (or diaphragm coupling) and drive (motor, turbine, diesel engine etc.) connected, Clockwise rotation from the drive end to the pump.

Material:
Suction casing  Discharge casing  Channel ring:
High Quality steel;
The guide vane and impeller: Chrome;
Balance disc, balance: sleeve: Chrome;
The guide vane sleeve, sealing ring:
chromium molybdenum steel;
Shaft: chrome molybdenum steel;

Model specification:
4   ZDG  X    7
4:Pump design serial number;
ZDG:Medium pressure boiler feed water pump;
 7:Pump series;

DG  36  -----   50  X  7
DG:Multistage boiler feed pump;
36:Design point flow(m3/h);
50:Single-stage head(m);
7:Pump series;

ZDG  Medium pressure pump structure
1

1

front casing

2

End casing

3

Stage casing

4

diffuser

5

End diffuser

6

Balance room

7

Bearing frame

8

Balance plate

9

Balance sleeve

10

Diffuser sleeve

11

Sealing ring

12

Cooling chamber cover

13

Locating piece

14

Feather key

15

poles

16

Coupling components

17

Coupling  A components

18

Coupling B components

19

Cooling gland components

20

Pump cover components

21

balanced return pipe component

22

Pump base

23

integration of a rotor components

 

 


DG
Medium pressure pump structure
2

1

Suction casing

2

Stage casing

3

discharge casing

4

End cap

5

diffuser

6

Discharge casing diffuser

7

Diffuser sleeve

8

Balance sleeve

9

Balance ring

10

draw-in bolt

11

shaft

12

Coupling

13

sliding bearing parts A

14

sliding bearing parts B

15

packing gland

16

Packing gland ring

17

impeller

18

Balance disc

Performance table

泵型号
Pump type

流量Q
Flow(m3/h)

扬程H
Head(m)

转速n
(r/min)

泵效率η
(%)

允许汽蚀余量
Npsh(m)

轴功率Pa
(kw)

电机功率P (kw)

泵重W
(kg)

DG6-25X3

3.8
6.3
7.5

78
75
72

2950

35
47
49

2.0
2.0
2.5

2.3
2.7
3.0

5.5

 

DG6-25X4

3.8
6.3
7.5

104
100
96

2950

35
47
49

2.0
2.0
2.5

3.1
3.7
4.0

5.5

 

DG6-25X5

3.8
6.3
7.5

130
125
120

2950

35
47
49

2.0
2.0
2.5

3.8
4.6
5.0

7.5

 

DG6-25X6

3.8
6.3
7.5

156
150
144

2950

35
47
49

2.0
2.0
2.5

4.6
5.5
6.0

7.5

 

DG6-25X7

3.8
6.3
7.5

182
175
168

2950

35
47
49

2.0
2.0
2.5

5.4
6.4
7.0

11

 

DG6-25X8

3.8
6.3
7.5

208
200
192

2950

35
47
49

2.0
2.0
2.5

6.2
7.3
8.0

11

 

DG6-25X9

3.8
6.3
7.5

234
225
216

2950

35
47
49

2.0
2.0
2.5

6.9
8.2
9.0

15

 

DG6-25X10

3.8
6.3
7.5

260
250
240

2950

35
47
49

2.0
2.0
2.5

7.7
9.1
10.0

15

 

DG6-25X11

3.8
6.3
7.5

286
275
264

2950

35
47
49

2.0
2.0
2.5

8.5
10.0
11.0

18.5

 

Performance table

泵型号
Pump type

流量Q
Flow(m3/h)

扬程H
Head(m)

转速n
(r/min)

泵效率η
(%)

允许汽蚀余量
Npsh(m)

轴功率Pa
(kw)

电机功率P (kw)

泵重W
(kg)

DG6-25X12

3.8
6.3
7.5

312
300
288

2950

35
47
49

2.0
2.0
2.5

9.2
11.0
12.0

18.5

 

DG6-30X3

15.0
25.0
30.0

102
90
81

2950

52
64
65

2.2
2.2
2.6

8.0
9.6
10.2

15

 

DG6-30X4

15.0
25.0
30.0

136
120
108

2950

52
64
65

2.2
2.2
2.6

10.7
12.8
13.6

18.5

 

DG6-30X5

15.0
25.0
30.0

170
150
135

2950

52
64
65

2.2
2.2
2.6

13.4
16.0
17.0

22

 

DG6-30X6

15.0
25.0
30.0

204
180
162

2950

52
64
65

2.2
2.2
2.6

16.0
19.2
20.4

30

 

DG6-30X7

15.0
25.0
30.0

238
210
189

2950

52
64
65

2.2
2.2
2.6

18.7
22.3
23.8

30

 

DG6-30X8

15.0
25.0
30.0

272
240
216

2950

52
64
65

2.2
2.2
2.5

21.4
25.5
27.1

37

 

DG6-30X9

15.0
25.0
30.0

300
270
243

2950

52
64
65

2.2
2.2
2.5

23.6
28.7
30.5

37

 

DG6-30X10

15.0
25.0
30.0

340
300
270

2950

52
64
65

2.2
2.2
2.5

26.7
31.9
33.9

45

 

Performance table

泵型号
Pump type

流量Q
Flow(m3/h)

扬程H
Head(m)

转速n
(r/min)

泵效率η
(%)

允许汽蚀余量
Npsh(m)

轴功率Pa
(kw)

电机功率P (kw)

泵重W
(kg)

DG36-50X7

28.8
32.4
36.0

370
367
363

2950

55
56
57

6.3

52.8
57.8
62.4

75

298

DG36-50X8

28.8
32.4
36.0

423
419
415

2950

55
56
57

6.3

60.3
66.0
71.4

90

319

DG36-50X9

28.8
32.4
36.0

476
472
467

2950

55
56
57

6.3

67.9
74.4
80.3

110

340

DG36-50X10

28.8
32.4
36.0

529
524
519

2950

55
56
57

6.3

75.4
82.6
89.3

110

340

DG46-30X3

30.0
46.0
55.0

102
90
81

2950

66
72
70

2.4
3.0
4.6

12.6
15.7
17.3

22

361

DG46-30X4

30.0
46.0
55.0

136
120
108

2950

66
72
70

2.4
3.0
4.6

16.8
20.9
23.1

30

 

DG46-30X5

30.0
46.0
55.0

170
150
135

2950

66
72
70

2.4
3.0
4.6

21.0
26.1
28.9

37

 

DG46-30X6

30.0
46.0
55.0

204
180
162

2950

66
72
70

2.4
3.0
4.6

25.3
31.3
34.7

37

 

DG46-30X7

30.0
46.0
55.0

238
210
139

2950

66
72
70

2.4
3.0
4.6

29.5
36.5
29.7

45

 

Performance table

性能表Performance table


泵型号
Pump type

流量Q
Flow(m3/h)

扬程H
Head(m)

转速n
(r/min)

泵效率η
(%)

允许汽蚀余量
Npsh(m)

轴功率Pa
(kw)

电机功率P (kw)

泵重W
(kg)

DG46-30X8

30.0
46.0
55.0

274
240
216

2950

66
72
70

2.4
3.0
4.6

33.9
41.8
46.2

55

 

DG46-30X9

30.0
46.0
55.0

306
270
243

2950

66
72
70

2.4
3.0
4.6

37.9
47.0
52.0

 

55

 

DG46-30X10

30.0
46.0
55.0

340
300
270

2950

66
72
70

2.4
3.0
4.6

42.1
52.2
57.8

75

 

DG46-50X3

30.0
46.0
55.0

168
150
138

2950

56
65
66

2.5
2.8
3.2

24.5
28.9
31.3

37

 

DG46-50X4

30.0
46.0
55.0

224
200
134

2950

56
65
66

2.5
2.8
3.2

32.7
38.6
30.4

45

 

DG46-50X5

30.0
46.0
55.0

280
250
230

2950

56
65
66

2.5
2.8
3.2

40.8
48.2
52.2

55

 

DG46-50X6

30.0
46.0
55.0

336
300
276

2950

56
65
66

2.5
2.8
3.2

49.0
57.8
62.6

75

 

DG46-50X7

30.0
46.0
55.0

392
350
322

2950

56
65
66

2.5
2.8
3.2

57.2
67.5
73.1

75

 

DG46-50X8

30.0
46.0
55.0

448
100
368

2950

56
65
66

2.5
2.8
3.2

65.4
77.1
83.5

90

 

 

Performance table


泵型号
Pump type

流量Q
Flow(m3/h)

扬程H
Head(m)

转速n
(r/min)

泵效率η
(%)

允许汽蚀余量
Npsh(m)

轴功率Pa
(kw)

电机功率P (kw)

泵重W
(kg)

DG46-50X9

30.0
46.0
55.0

504
450
414

2950

56
65
66

2.5
2.8
3.2

73.5
86.7
94.0

110

 

DG46-50X10

30.0
46.0
55.0

560
500
460

2950

56
65
66

2.5
2.8
3.2

81.7
96.4
104.4

110/132

 

DG46-50X11

30.0
46.0
55.0

616
550
506

2950

56
65
66

2.5
2.8
3.2

89.9
106.0
114.8

132

 

DG46-50X12

30.0
46.0
55.0

672
600
552

2950

56
65
66

2.5
2.8
3.2

98.0
115.6
125.3

132/160

 

4ZDGX6

30.0
46.0
53.0

330
300
270

2950

65
68
65

3.2
3.6
4

41.5
55.3
60.0

75

 

4ZDGX7

30.0
46.0
53.0

385
350
315

2950

65
68
65

3.2
3.6
4

48.4
64.5
70.0

90

 

4ZDGX8

30.0
46.0
53.0

440
400
360

2950

65
68
65

3.2
3.6
4

55.3
73.7
80

90

 

4ZDGX9

30.0
46.0
53.0

495
450
405

2950

65
68
65

3.2
3.62
4

62.2
82.9
89.9

110

 

4ZDGX10

30.0
46.0
53.0

550
500
450

2950

65
68
65

3.2
3.6
4

69.1
92.1
99.9

110

 


Performance table


泵型号
Pump type

流量Q
Flow(m3/h)

扬程H
Head(m)

转速n
(r/min)

泵效率η
(%)

允许汽蚀余量
Npsh(m)

轴功率Pa
(kw)

电机功率P (kw)

泵重W
(kg)

5ZDGX5

65.0
85.0
94.0

359
335
316

2950

61
66
66

5.5
7.5
8.5

103.9
117.5
122.6

132

 

5ZDGX6

65.0
85.0
94.0

430
402
380

2950

61
66
66

5.5
7.5
8.5

124.4
141.0
147.4

160

 

5ZDGX7

65.0
85.0
94.0

502
469
443

2950

61
66
66

5.5
7.5
8.5

145.2
164.5
171.8

185

 

5ZDGX8

65.0
85.0
94.0

547
536
506

2950

61
66
66

5.5
7.5
8.5

186.1
188.0
196.3

220

 

5ZDGX9

65.0
85.0
94.0

646
603
570

2950

61
66
66

5.5
7.5
8.5

186.9
211.5
221.1

250

 

6ZDGX5

124.0
155.0
180.0

373
335
295

2950

74
75
70

3.7
5.0
5.8

170.2
188.5
206.6

220

 

6ZDGX6

124.0
155.0
180.0

448
402
354

2950

74
75
70

3.7
5.0
5.8

204.4
226.3
247.9

280

 

6ZDGX7

124.0
155.0
180.0

552
469
413

2950

74
75
70

3.7
5.0
5.8

251.9
264.0
289.2

315

 

6ZDGX8

124.0
155.0
180.0

697
536
472

2950

74
75
70

3.7
5.0
5.8

318.1
201.7
330.5

355

 


Performance table


泵型号
Pump type

流量Q
Flow(m3/h)

扬程H
Head(m)

转速n
(r/min)

泵效率η
(%)

允许汽蚀余量
Npsh(m)

轴功率Pa
(kw)

电机功率P (kw)

泵重W
(kg)

6ZDGX9

124.0
155.0
180.0

672
603
531

2950

74
75
70

3.7
5.0
5.8

306.7
339.4
371.8

400

 


DG appearance and installation drawing
3

DG Installation size table
4

DG Installation size table5
ZDG Installation size table

6

 

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Shenyang No.1 Pump Co.,Ltd established a complete manufacturing system,
fully realizing the automatic production and processing.