Product Description
Model Code Explanation
Product Introduction
D/DG series horizontal multistage clean water pumps are horizontal single-suction, multistage sectional centrifugal pumps. With an advanced hydraulic model, they feature high efficiency, wide performance range, safe and stable operation, low noise, long service life, and convenient installation and maintenance.
They are suitable for conveying clear water free of solid particles (abrasives) and suspended matter, or other liquids with physical and chemical properties similar to water. By changing the pump material (or the materials of the wetted parts), sealing type and adding a cooling system, the pumps can also be used to convey hot water, oil, corrosive or abrasive media, etc. The allowable inlet pressure is not more than 0.6 MPa.
1. Advanced hydraulic model with high efficiency and wide performance range.
2. Smooth running with low noise.
3. Shaft seal can be soft packing or mechanical seal, with reliable sealing, simple structure, and easy, quick maintenance.
4. The shaft is fully sleeved, so it does not contact the medium, is not corroded and has a long service life.
D/DG series horizontal multistage clean water pumps generally have horizontal suction and vertical discharge; for oilfield water injection service, both suction and discharge nozzles are vertically upward. For DG series multistage pumps, suction and discharge nozzles are both vertically upward.
For D series horizontal multistage clean water pumps, the shaft sealing water is taken from the pressurized water inside the pump, while for DG series horizontal multistage pumps, the shaft sealing water is supplied from an external source.
D/DG series horizontal multistage pumps are horizontal single-suction multistage sectional centrifugal pumps, used for conveying clear water (impurity content less than 1%, particle size less than 0.1 mm) or other liquids with physical and chemical properties similar to water.
For D/DG series horizontal multistage pumps, the medium temperature is lower than 80 °C, suitable for mine drainage, oilfield water injection, industrial and municipal water supply and drainage, etc.
For oilfield water injection pumps, different materials are used according to the corrosiveness of the medium.
For D/DG series horizontal multistage centrifugal pumps used as boiler feed pumps, the medium temperature is lower than 105 °C, suitable for various boiler feed water applications.
Structure Description
D/DG series horizontal multistage clean water pumps mainly consist of four parts: stator, rotor, bearings and shaft seal:
1. The stator section mainly consists of suction casing, middle casing, discharge casing and guide vanes. The sections are clamped together with tie bolts to form the working chamber.
2. The rotor section mainly consists of shaft, impellers, balance disc and shaft sleeves. Axial thrust is balanced by the balance disc.
3. The bearing section mainly consists of bearing housings, bearings and bearing covers. The bearings are lubricated with grease or thin oil.
4. The shaft seal adopts soft packing, mainly consisting of stuffing boxes in the suction casing and tail cover, packing and water-retaining rings.
5. The pump is driven directly by the prime mover through a flexible coupling.
Structure Diagram
|
1
|
Inlet Casing
|
2
|
Discharge Casing
|
3
|
Middle Casing
|
4
|
Guide Vane
|
5
|
Impeller
|
6
|
Tail Cover
|
7
|
Seal Ring
|
|
8
|
Guide Vane Sleeve
|
9
|
Balance Ring
|
10
|
Balance Disc
|
11
|
Packing Ring
|
12
|
Shaft
|
13
|
Shaft Sleeve A
|
14
|
Shaft Sleeve B
|
|
15
|
Left Bearing Assembly
|
16
|
Right Bearing Assembly
|
17
|
Bearing Retaining Sleeve
|
18
|
Tie Bolt
|
19
|
Packing Gland
|
性能参数
|
Model
|
Speed (rpm)
|
Flow Rate (m³/h)
|
Head (m)
|
Efficiency (%)
|
Power (kW)
|
NPSHr
|
||
|
(r/min)
|
(m3/h)
|
(L/s)
|
(m)
|
(%)
|
Shaft Power
|
Motor Power (kW)
|
(m)
|
|
|
DG6-25×3
|
2950
|
6.3
|
1.75
|
75
|
45
|
2.86
|
5.5
|
2
|
|
DG6-25×4
|
2950
|
6.3
|
1.75
|
100
|
45
|
3.81
|
7.5
|
2
|
|
DG6-25×5
|
2950
|
6.3
|
1.75
|
125
|
45
|
4.77
|
7.5
|
2
|
|
DG6-25×6
|
2950
|
6.3
|
1.75
|
150
|
45
|
5.72
|
11
|
2
|
|
DG6-25×7
|
2950
|
6.3
|
1.75
|
175
|
45
|
6.67
|
11
|
2
|
|
DG6-25×8
|
2950
|
6.3
|
1.75
|
200
|
45
|
7.63
|
15
|
2
|
|
DG6-25×9
|
2950
|
6.3
|
1.75
|
225
|
45
|
8.52
|
15
|
2
|
|
DG6-25×10
|
2950
|
6.3
|
1.75
|
250
|
45
|
9.53
|
18.5
|
2
|
|
DG6-25×11
|
2950
|
6.3
|
1.75
|
275
|
45
|
10.5
|
18.5
|
2
|
|
DG6-25×12
|
2950
|
6.3
|
1.75
|
300
|
45
|
11.44
|
18.5
|
2
|
|
Model
|
Speed (rpm)
|
Flow Rate (m³/h)
|
Head (m)
|
Efficiency (%)
|
Power (kW)
|
NPSHr
|
||
|
(r/min)
|
(m3/h)
|
(L/s)
|
(m)
|
(%)
|
Shaft Power
|
Motor Power (kW)
|
(m)
|
|
|
DG12-25×3
|
2950
|
12.5
|
3.47
|
75
|
54
|
4.73
|
7.5
|
2
|
|
DG12-25×4
|
2950
|
12.5
|
3.47
|
100
|
54
|
6.3
|
11
|
2
|
|
DG12-25×5
|
2950
|
12.5
|
3.47
|
125
|
54
|
7.88
|
11
|
2
|
|
DG12-25×6
|
2950
|
12.5
|
3.47
|
150
|
54
|
9.46
|
15
|
2
|
|
DG12-25×7
|
2950
|
12.5
|
3.47
|
175
|
54
|
11
|
15
|
2
|
|
DG12-25×8
|
2950
|
12.5
|
3.47
|
200
|
54
|
12.51
|
18.5
|
2
|
|
DG12-25×9
|
2950
|
12.5
|
3.47
|
225
|
54
|
14.18
|
18.5
|
2
|
|
DG12-25×10
|
2950
|
12.5
|
3.47
|
250
|
54
|
15.76
|
22
|
2
|
|
DG12-25×11
|
2950
|
12.5
|
3.47
|
275
|
54
|
17.34
|
22
|
2
|
|
DG12-25×12
|
2950
|
12.5
|
3.47
|
300
|
54
|
18.9
|
30
|
2
|
|
Model
|
Speed (rpm)
|
Flow Rate (m³/h)
|
Head (m)
|
Efficiency (%)
|
Power (kW)
|
NPSHr
|
||
|
(r/min)
|
(m3/h)
|
(L/s)
|
(m)
|
(%)
|
Shaft Power
|
Motor Power (kW)
|
(m)
|
|
|
DG25-30×3
|
2950
|
25
|
6.94
|
90
|
62
|
9.88
|
15
|
2
|
|
DG25-30×4
|
2950
|
25
|
6.94
|
120
|
62
|
13.1
|
18.5
|
2
|
|
DG25-30×5
|
2950
|
25
|
6.94
|
150
|
62
|
16.47
|
22
|
2
|
|
DG25-30×6
|
2950
|
25
|
6.94
|
180
|
62
|
19.77
|
30
|
2
|
|
DG25-30×7
|
2950
|
25
|
6.94
|
210
|
62
|
23.1
|
30
|
2
|
|
DG25-30×8
|
2950
|
25
|
6.94
|
240
|
62
|
26.4
|
37
|
2
|
|
DG25-30×9
|
2950
|
25
|
6.94
|
270
|
62
|
29.65
|
37
|
2
|
|
DG25-30×10
|
2950
|
25
|
6.94
|
300
|
62
|
32.9
|
4.5
|
2
|
|
Model
|
Speed (rpm)
|
Flow Rate (m³/h)
|
Head (m)
|
Efficiency (%)
|
Power (kW)
|
NPSHr
|
||
|
(r/min)
|
(m3/h)
|
(L/s)
|
(m)
|
(%)
|
Shaft Power
|
Motor Power (kW)
|
(m)
|
|
|
DG46-30×3
|
2950
|
46
|
12.8
|
90
|
70
|
16.11
|
22
|
3
|
|
DG46-30×4
|
2950
|
46
|
12.8
|
120
|
70
|
21.48
|
30
|
3
|
|
DG46-30×5
|
2950
|
46
|
12.8
|
150
|
70
|
26.85
|
37
|
3
|
|
DG46-30×6
|
2950
|
46
|
12.8
|
180
|
70
|
32.21
|
37
|
3
|
|
DG46-30×7
|
2950
|
46
|
12.8
|
210
|
70
|
37.58
|
45
|
3
|
|
DG46-30×8
|
2950
|
46
|
12.8
|
240
|
70
|
42.95
|
55
|
3
|
|
DG46-30×9
|
2950
|
46
|
12.8
|
270
|
70
|
48.32
|
55
|
3
|
|
DG46-30×10
|
2950
|
46
|
12.8
|
300
|
70
|
53.69
|
75
|
3
|
|
Model
|
Speed (rpm)
|
Flow Rate (m³/h)
|
Head (m)
|
Efficiency (%)
|
Power (kW)
|
NPSHr
|
||
|
(r/min)
|
(m3/h)
|
(L/s)
|
(m)
|
(%)
|
Shaft Power
|
Motor Power (kW)
|
(m)
|
|
|
DG46-50×3
|
2950
|
46
|
12.8
|
150
|
63
|
29.83
|
37
|
3
|
|
DG46-50×4
|
2950
|
46
|
12.8
|
200
|
63
|
39.77
|
45
|
3
|
|
DG46-50×5
|
2950
|
46
|
12.8
|
250
|
63
|
49.71
|
55
|
2.8
|
|
DG46-50×6
|
2950
|
46
|
12.8
|
300
|
63
|
59.65
|
75
|
2.8
|
|
DG46-50×7
|
2950
|
46
|
12.8
|
350
|
63
|
69.6
|
90
|
2.8
|
|
DG46-50×8
|
2950
|
46
|
12.8
|
400
|
63
|
79.54
|
90
|
2.8
|
|
DG46-50×9
|
2950
|
46
|
12.8
|
450
|
63
|
89.48
|
110
|
2.8
|
|
DG46-50×10
|
2950
|
46
|
12.8
|
500
|
63
|
99.42
|
110
|
2.8
|
|
DG46-50×11
|
2950
|
46
|
12.8
|
550
|
63
|
109.36
|
132
|
2.8
|
|
DG46-50×12
|
2950
|
46
|
12.8
|
600
|
63
|
119.3
|
132
|
2.8
|
Installation Dimensions
|
Model
|
A
|
B
|
C
|
E
|
F
|
L
|
I
|
M
|
N
|
O
|
H
|
J
|
b
|
K
|
P
|
Q
|
n-φd
|
|
DG6-25×3
|
1175
|
885
|
600
|
145
|
192
|
250
|
180
|
265
|
135
|
210
|
230
|
440
|
170
|
413
|
390
|
390
|
4-φ24
|
|
DG6-25×4
|
1225
|
985
|
650
|
195
|
142
|
250
|
230
|
265
|
135
|
210
|
230
|
400
|
170
|
413
|
390
|
390
|
4-φ24
|
|
DG6-25×5
|
1275
|
985
|
650
|
195
|
192
|
250
|
280
|
265
|
135
|
210
|
230
|
400
|
170
|
413
|
390
|
390
|
4-φ24
|
|
DG6-25×6
|
1450
|
1205
|
785
|
245
|
141
|
250
|
330
|
265
|
165
|
255
|
240
|
410
|
170
|
465
|
435
|
435
|
4-φ24
|
|
DG6-25×7
|
1500
|
1205
|
785
|
245
|
191
|
250
|
380
|
265
|
165
|
255
|
240
|
410
|
170
|
465
|
435
|
435
|
4-φ24
|
|
DG6-25×8
|
1550
|
1305
|
835
|
295
|
141
|
250
|
430
|
265
|
165
|
255
|
240
|
410
|
170
|
465
|
435
|
435
|
4-φ24
|
|
DG6-25×9
|
1600
|
1305
|
835
|
295
|
191
|
250
|
480
|
265
|
165
|
255
|
240
|
410
|
170
|
465
|
435
|
435
|
4-φ24
|
|
DG6-25×10
|
1695
|
1500
|
935
|
370
|
91
|
250
|
530
|
265
|
165
|
255
|
240
|
410
|
170
|
465
|
435
|
435
|
4-φ24
|
|
DG6-25×11
|
1745
|
1500
|
935
|
370
|
141
|
250
|
580
|
265
|
165
|
255
|
240
|
410
|
170
|
465
|
435
|
435
|
4-φ24
|
|
DG6-25×12
|
1795
|
1500
|
935
|
370
|
191
|
250
|
630
|
265
|
165
|
255
|
240
|
410
|
170
|
465
|
435
|
435
|
4-φ24
|
|
Model
|
A
|
B
|
C
|
E
|
F
|
L
|
I
|
M
|
N
|
O
|
H
|
J
|
b
|
K
|
P
|
Q
|
n-φd
|
|
DG12-25×3
|
1175
|
874
|
600
|
140
|
180
|
250
|
180
|
265
|
135
|
210
|
230
|
400
|
170
|
413
|
395
|
295
|
4-φ25
|
|
DG12-25×4
|
1350
|
1040
|
710
|
165
|
183
|
250
|
230
|
265
|
165
|
255
|
240
|
410
|
170
|
465
|
430
|
430
|
4-φ25
|
|
DG12-25×5
|
1400
|
1090
|
730
|
190
|
183
|
250
|
280
|
265
|
165
|
255
|
240
|
410
|
170
|
465
|
430
|
430
|
4-φ25
|
|
DG12-25×6
|
1450
|
1140
|
740
|
232
|
183
|
250
|
330
|
265
|
165
|
255
|
240
|
410
|
170
|
465
|
430
|
430
|
4-φ25
|
|
DG12-25×7
|
1500
|
1190
|
780
|
242
|
183
|
250
|
380
|
265
|
165
|
255
|
240
|
410
|
170
|
465
|
430
|
430
|
4-φ25
|
|
DG12-25×8
|
1595
|
1284
|
830
|
266
|
183
|
250
|
430
|
265
|
165
|
255
|
240
|
410
|
170
|
465
|
430
|
430
|
4-φ25
|
|
DG12-25×9
|
1645
|
1334
|
850
|
294
|
183
|
250
|
840
|
265
|
165
|
255
|
240
|
410
|
170
|
465
|
430
|
430
|
4-φ25
|
|
DG12-25×10
|
1720
|
1397
|
870
|
327
|
172
|
250
|
530
|
265
|
180
|
285
|
260
|
430
|
170
|
510
|
400
|
460
|
4-φ25
|
|
DG12-25×11
|
1770
|
1447
|
900
|
347
|
172
|
250
|
580
|
265
|
180
|
285
|
260
|
430
|
170
|
510
|
400
|
460
|
4-φ25
|
|
DG12-25×12
|
1925
|
1571
|
980
|
371
|
176
|
250
|
633
|
265
|
200
|
310
|
260
|
450
|
170
|
555
|
400
|
500
|
4-φ25
|
|
Model
|
A
|
B
|
C
|
E
|
F
|
L
|
I
|
M
|
N
|
O
|
H
|
J
|
b
|
K
|
P
|
Q
|
n-φd
|
|
DG25-30×3
|
1450
|
1110
|
760
|
185
|
227
|
285
|
230
|
330
|
165
|
255
|
250
|
460
|
210
|
475
|
460
|
460
|
4-φ30
|
|
DG25-30×4
|
1560
|
1219
|
850
|
204
|
228
|
285
|
295
|
330
|
165
|
255
|
250
|
460
|
210
|
475
|
460
|
460
|
4-φ30
|
|
DG25-30×5
|
1650
|
1297
|
880
|
237
|
228
|
285
|
360
|
330
|
180
|
285
|
260
|
470
|
210
|
510
|
460
|
460
|
4-φ30
|
|
DG25-30×6
|
1825
|
1432
|
970
|
262
|
225
|
285
|
425
|
330
|
200
|
310
|
280
|
490
|
210
|
555
|
460
|
505
|
4-φ30
|
|
DG25-30×7
|
1885
|
1497
|
1000
|
297
|
225
|
285
|
490
|
330
|
200
|
310
|
280
|
490
|
210
|
555
|
460
|
505
|
4-φ30
|
|
DG25-30×8
|
1950
|
1562
|
1030
|
332
|
225
|
285
|
555
|
330
|
200
|
310
|
280
|
490
|
210
|
555
|
460
|
505
|
4-φ30
|
|
DG25-30×9
|
2015
|
1627
|
1080
|
347
|
225
|
285
|
620
|
330
|
200
|
310
|
280
|
490
|
210
|
555
|
460
|
505
|
4-φ30
|
|
DG25-30×10
|
2150
|
1728
|
1120
|
398
|
222
|
285
|
685
|
330
|
225
|
345
|
305
|
515
|
210
|
610
|
540
|
460
|
4-φ30
|
|
Model
|
A
|
B
|
C
|
E
|
F
|
L
|
I
|
M
|
N
|
O
|
H
|
J
|
b
|
K
|
P
|
Q
|
n-φd
|
|
DG46-30×3
|
1520
|
1167
|
845
|
130
|
228
|
285
|
230
|
330
|
180
|
285
|
260
|
470
|
210
|
510
|
460
|
460
|
4-φ30
|
|
DG46-30×4
|
1690
|
1302
|
850
|
242
|
225
|
285
|
295
|
330
|
200
|
310
|
280
|
490
|
210
|
555
|
460
|
505
|
4-φ30
|
|
DG46-30×5
|
1755
|
1367
|
910
|
247
|
225
|
285
|
360
|
330
|
200
|
310
|
280
|
490
|
210
|
555
|
460
|
505
|
4-φ30
|
|
DG46-30×6
|
1820
|
1432
|
935
|
287
|
225
|
285
|
425
|
330
|
200
|
310
|
280
|
490
|
210
|
555
|
460
|
505
|
4-φ30
|
|
DG46-30×7
|
1925
|
1532
|
1010
|
302
|
223
|
285
|
490
|
330
|
225
|
345
|
305
|
515
|
210
|
610
|
460
|
545
|
4-φ30
|
|
DG46-30×8
|
2105
|
1694
|
1110
|
349
|
221
|
285
|
555
|
330
|
250
|
385
|
330
|
540
|
210
|
655
|
460
|
594
|
4-φ30
|
|
DG46-30×9
|
2170
|
1759
|
1140
|
384
|
221
|
285
|
620
|
330
|
250
|
385
|
330
|
540
|
210
|
655
|
460
|
594
|
4-φ30
|
|
DG46-30×10
|
2305
|
1897
|
1245
|
402
|
219
|
285
|
685
|
330
|
280
|
410
|
360
|
570
|
210
|
720
|
460
|
650
|
4-φ30
|
|
Model
|
A
|
B
|
C
|
E
|
F
|
L
|
I
|
M
|
N
|
O
|
H
|
J
|
b
|
K
|
P
|
Q
|
n-φd
|
|
DG46-50×3
|
1717
|
1317
|
875
|
215
|
246
|
339
|
245
|
353
|
200
|
310
|
360
|
630
|
300
|
635
|
500
|
500
|
4-φ24
|
|
DG46-50×4
|
1817
|
1415
|
925
|
293
|
246
|
339
|
305
|
353
|
225
|
345
|
420
|
690
|
300
|
725
|
500
|
500
|
4-φ24
|
|
DG46-50×5
|
1992
|
1571
|
1020
|
341
|
240
|
339
|
365
|
353
|
250
|
385
|
420
|
690
|
300
|
745
|
500
|
600
|
4-φ24
|
|
DG46-50×6
|
2122
|
1758
|
1130
|
321
|
180
|
339
|
425
|
353
|
280
|
410
|
420
|
690
|
300
|
780
|
500
|
650
|
6-φ24
|
|
DG46-50×7
|
2182
|
1758
|
1130
|
321
|
240
|
339
|
485
|
353
|
280
|
410
|
420
|
690
|
300
|
780
|
500
|
650
|
6-φ24
|
|
DG46-50×8
|
2292
|
1869
|
1180
|
331
|
240
|
339
|
545
|
353
|
280
|
410
|
420
|
690
|
300
|
780
|
500
|
650
|
6-φ24
|
|
DG46-50×9
|
2473
|
2046
|
1330
|
360
|
166
|
339
|
605
|
353
|
323
|
550
|
515
|
785
|
300
|
970
|
500
|
750
|
6-φ24
|
|
DG46-50×10
|
2533
|
2046
|
1330
|
360
|
226
|
339
|
665
|
353
|
323
|
550
|
515
|
785
|
300
|
970
|
500
|
750
|
6-φ24
|
|
DG46-50×11
|
2641
|
2222
|
1480
|
370
|
166
|
339
|
725
|
353
|
323
|
550
|
515
|
785
|
300
|
970
|
500
|
750
|
6-φ24
|
|
DG46-50×12
|
2701
|
2222
|
1480
|
370
|
226
|
339
|
785
|
353
|
323
|
550
|
515
|
785
|
300
|
970
|
500
|
750
|
6-φ24
|
Suction & Discharge Flanges
|
Dimensions
|
Suction Flange
|
Discharge Flange
|
||||||
|
Model
|
Dg
|
Do
|
D
|
n-do
|
Dg
|
Do
|
D
|
n-do
|
|
D6-25 / DG6-25
|
40
|
100
|
130
|
4-φ13.5
|
40
|
110
|
150
|
4-φ17.5
|
|
D12-25 / DG12-25
|
50
|
110
|
140
|
4-φ13.5
|
40
|
110
|
150
|
4-φ17.5
|
|
D25-30 / DG25-30
|
65
|
130
|
160
|
4-φ17.5
|
65
|
145
|
185
|
8-φ17.5
|
|
D46-30 / DG46-30
|
80
|
150
|
190
|
4-φ17.5
|
65
|
145
|
185
|
8-φ17.5
|
|
D46-50 / DG46-50
|
80
|
150 / 170
|
190 / 215
|
4-φ17.5 / 8-φ22
|
80
|
170
|
215
|
8-φ22
|
Preparation Work
(1) Assembly Sequence:
(1) Install the sealing rings onto the suction section and guide vane plate.
(2) Install the diffuser sleeve on the middle section, then install the diffuser plate on all middle sections.
(3) Install shaft sleeve A and the shaft through the suction section, push in the impeller, place a paper gasket on the middle section, install the middle section, then push in the second impeller. Repeat until all impellers and middle sections are installed.
(4) Install the balance ring, balance sleeve, and discharge diffuser onto the discharge section.
(5) Assemble the discharge section onto the middle section, then tighten suction, middle, and discharge sections using tie bolts.
(6) Install the balance disc and shaft sleeve B (50D8 pump has no such part).
(7) Install gasket and stuffing box on the tail cover, then install packing, packing ring, and packing gland into the stuffing chambers of suction and tail cover.
(8) Install bearing housings on both suction and tail covers and tighten with bolts.
(9) Install bearing locating sleeve, ball bearings, and secure with nuts.
(10) Fill bearings with grease, install gasket on bearing cover, and tighten the bearing cover.
(11) Install the coupling components, vent valve, and pipe plugs.
Disassembly is done in reverse order.
(2) Installation:
1. Preparations:
– Inspect pump and motor.
– Prepare tools and lifting equipment.
– Check foundation.
2. Installation Steps:
– Move the unit to site. If the unit has a base, the motor is preinstalled; no need to disassemble.
– Position base on foundation using wedges. Raise 20–40 mm for grouting.
– Level the base, tighten anchor bolts, then grout.
– After 3–4 days, re-check level.
– Clean mounting surfaces of base, pump feet, motor feet, then place pump and motor.
– Align pump shaft horizontally and tighten lightly. Install motor; adjust with shims if needed.
– Use straightedge on coupling to check shaft alignment. Correct until coupling plane deviation ≤0.3 mm and center deviation ≤0.1 mm.
(3) Startup & Shutdown:
– Clean oil from shaft and parts.
– Clean bearings and oil chamber; fill with grease.
– Test-run motor direction.
– Fill pump with water or prime pump.
– Close discharge valve and pressure gauge cock.
– Start motor, open pressure gauge cock.
– When pump runs normally, gradually open discharge valve.
– Shutdown: slowly close discharge valve, close vacuum gauge cock, stop motor, then close pressure gauge cock.
– For long-term shutdown: drain pump, clean, oil components, store properly.
(4) Operation:
– Bearing temperature must not exceed ambient temperature by more than 35°C; max 75°C.
– Normal packing leakage ≤ 15 ml/min; adjust as necessary.
– Regularly inspect coupling and motor bearing temperature.
– Stop pump immediately if abnormal noise or vibration occurs.
OEM & Custom Solutions
We provide OEM/ODM manufacturing with options for stainless steel, cast iron, or special alloys. Customizations include voltage (220V/415V/460V), explosion-proof motors, base-mounted assemblies, and control panels. Each unit is tested for hydraulic performance, vibration, and noise compliance under ISO and CE export standards.
FAQs for Oversea Buyers
Q: What’s the main application of the D/DG multistage pump?
A: It’s mainly used for industrial water supply, boiler feed, pressure boosting, and clean water circulation.
Q: What temperature range can it handle?
A: D type ≤80°C; DG type ≤105°C, suitable for high-temperature water systems.
Q: What materials are available?
A: Standard cast iron, with optional stainless steel or alloy materials for corrosive liquids.
Q: Can it operate under high pressure?
A: Yes, it can achieve heads up to 680 meters depending on the model and stage count.
Q: How often should maintenance be performed?
A: Inspect seals and bearings every 500 hours; perform a full overhaul every 12 months.
Q: Do you offer customized motor and control systems?
A: Yes, we support OEM motor configurations, VFD control panels, and export packaging.
Q: Which markets use this pump?
A: Widely exported to Southeast Asia, the Middle East, and South America for industrial, municipal, and mining water systems.