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D\DG\DF\DY Multi-Stage Single-Suction Centrifugal Pump

Keywords:

Multi-stage single suction centrifugal pump

Category:

D\DG\DF\DY Multi-Stage Single-Suction Centrifugal Pump

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Description Performance parameters

Product Overview

D, DG type pump is horizontal single-suction multi-stage centrifugal pump, for conveying clear water (containing less than 1% quality, granularity less than 0.1mm) or other liquids with physical and chemical properties similar to water. This series of pump is based on the series of products jointly developed by the pump industry and improved by our company, the efficiency value is 2~4% higher than the original product, which is favored by users under the current demand for energy saving, environmental protection and consumption reduction.

D type pump is used for conveying clear water below 80℃, or media with physical and chemical properties similar to water, and is suitable for mine drainage, factory and city water supply and drainage.

DG type pump conveys medium temperature less than 130℃, suitable for various boiler water supply, oil field water injection and other occasions.

DF type pump is used for mine drainage of acidic pit water with PH value of 2~4. The temperature of the conveyed medium shall not exceed 80℃.

DY type pump can be used in petroleum refining, petrochemical industry, transporting oil without solid particles, liquefied petroleum gas and other flammable and explosive or toxic high-temperature and high-pressure liquids.

The allowable inlet pressure of the pump is ≤1Mpa (the user must indicate the inlet pressure value of the pump when ordering).

Performance Range

Q:3.75m3/h~485m3/h

H:69m~1900m

Product Structure

The series pumps are horizontal single-suction multi-stage sectional centrifugal pumps, the inlet and outlet of DG and DY type pumps are vertical upwards, the inlet of D and DF type pumps are horizontal and the outlet is vertical upwards (see structure diagram). The suction section, the middle section and the discharge section are coupled into one by a piercing bar.

The pump is directly driven by the motor through flexible coupling, diaphragm coupling and gear coupling. The pump rotates in clockwise direction when viewed from the motor end.

The pump adopts carbon fiber woven fabric as soft packing and cooled by cooling water, while DG and DY type pumps are cooled by external cooling water. Replaceable sleeve is installed at the shaft seal to protect the pump shaft. Mechanical seal can also be used.

Bearing and balancing device.

The rotor of medium pressure type pump is supported by rolling bearings at both ends of the pump shaft. The rotor is lubricated by thin oil and cooled by circulating water, and the axial thrust of the rotor is automatically balanced by a balancing disk. The balanced return water is returned to the pump suction section through the balanced return pipe.

The rotor of the sub-pressure type pump is supported by the sliding bearings at both ends of the pump shaft. The rotor is lubricated by thin oil and cooled by circulating water, and the axial thrust of the rotor is balanced by a balancing disk. There is a return pipe between the balance chamber and the front section.

The rotor of the high-pressure type pump is supported by sliding bearings at both ends of the pump. The bearings are forcibly lubricated, the pump itself is equipped with an oil system, and the axial thrust of the rotor is balanced by a balance disk. And with thrust bearing, used to bear the residual axial force due to the change of working conditions, in the balance chamber body and the suction pipe is equipped with a return pipe between.

Model Meaning

xq

Materials

Name

D

DG

DG secondary high pressure DG High Pressure

DF

DY

Inlet section, outlet section, middle section

Cast iron, cast steel Cast iron, cast steel High quality carbon steel Carbon steel or chrome steel Chromium-manganese-nickel-nitrogen steel, chromium-molybdenum-copper steel, cast steel Chrome steel, cast steel

Guide vane, impeller, shaft sleeve

Cast iron, cast steel Cast iron, cast steel High quality carbon steel Carbon steel or chrome steel Chromium-molybdenum copper steel, chromium steel Chrome Steel

Balance plate, balance sleeve

Ductile Iron Chrome Steel Stainless Steel Carbon steel or chrome steel Chrome Steel Chrome Steel

Guide vane sleeve, sealing ring, impeller retaining sleeve

Ductile Iron Chromium-molybdenum steel Stainless Steel Chrome vanadium steel or chrome steel Chrome Steel Chrome Steel
Shaft Carbon Steel Carbon Steel Chrome vanadium steel or chrome steel Chrome vanadium steel or chrome steel Chrome Steel High quality stainless steel

 

Pump Model
(D、DG、DF、DY)

Flow

Q(m3/h)

Lift

H(m)

Rotational Speed n
(r/min)

Efficiency

η(%)

Power (kw)

Necessary cavitation allowance

NPSHr(m)

Weight

(kg)

Shaft power Motor power
6-25×3 6.3 75 2950 46.5 2.8 5.5 2 90
6-25×4 6.3 100 2950 46.5 3.7 7.5 2 100
6-25×5 6.3 125 2950 46.5 4.6 7.5 2 110
6-25×6 6.3 150 2950 46.5 5.5 11 2 120
6-25×7 6.3 175 2950 46.5 6.5 11 2 130
6-25×8 6.3 200 2950 46.5 7.2 15 2 140
6-25×9 6.3 225 2950 46.5 8.3 15 2 150
6-25×10 6.3 250 2950 46.5 9.2 18.5 2 160
6-25×11 6.3 275 2950 46.5 10.2 18.5 2 170
6-25×12 6.3 300 2950 46.5 11.1 18.5 2 180
12-25×3 12.5 75 2950 54 4.73 7.5 2 90
12-25×4 12.5 100 2950 54 6.3 11 2 100
12-25×5 12.5 125 2950 54 7.88 11 2 110
12-25×6 12.5 150 2950 54 9.46 15 2 120
12-25×7 12.5 175 2950 54 11 15 2 130
12-25×8 12.5 200 2950 54 12.61 18.5 2 140
12-25×9 12.5 225 2950 54 14.18 18.5 2 150
12-25×10 12.5 250 2950 54 15.76 22 2 160
12-25×11 12.5 275 2950 54 17.34 22 2 170
12-25×12 12.5 300 2950 54 18.9 30 2 180
12-50×2 12.5 100 2950 42 8.11 11 3 247
12-50×3 12.5 150 2950 42 12.16 15 3 268
12-50×4 12.5 200 2950 42 16.21 22 3 289
12-50×5 12.5 250 2950 42 20.26 30 3 310
12-50×6 12.5 300 2950 42 24.32 30 3 331
12-50×7 12.5 350 2950 42 28.37 37 3 352
12-50×8 12.5 400 2950 42 32.42 37 3 373
12-50×9 12.5 450 2950 42 36.47 45 3 394
12-50×10 12.5 500 2950 42 40.53 55 3 415
12-50×11 12.5 550 2950 42 44.58 55 3 436
12-50×12 12.5 600 2950 42 48.63 55 3 457
25-30×3 25 90 2950 62 9.88 15 2.2 188
25-30×4 25 120 2950 62 13.1 18.5 2.2 205
25-30×5 25 150 2950 62 16.47 22 2.2 222
25-30×6 25 180 2950 62 19.77 30 2.2 239
25-30×7 25 210 2950 62 23.1 30 2.2 256
25-30×8 25 240 2950 62 26.4 37 2.2 273
25-30×9 25 270 2950 62 29.65 37 2.2 290
25-30×10 25 300 2950 62 32.9 45 2.2 307
25-50×3 25 156 2950 57 18.6 30 2.5 553
25-50×4 25 208 2950 57 24.8 37 2.5 580
25-50×5 25 260 2950 57 31.1 45 2.5 607
25-50×6 25 312 2950 57 37.3 55 2.5 633
25-50×7 25 364 2950 57 43.5 55 2.5 660
25-50×8 25 416 2950 57 49.7 75 2.5 687
25-50×9 25 468 2950 57 55.9 75 2.5 714
25-50×10 25 520 2950 57 62.1 75 2.5 740
25-50×11 25 572 2950 57 68.3 90 2.5 767
25-50×12 25 624 2950 57 74.5 90 2.5 794
46-30×3 46 90 2950 70 16.11 22 3 180
46-30×4 46 120 2950 70 21.48 30 3 197
46-30×5 46 150 2950 70 26.85 37 3 214
46-30×6 46 180 2950 70 32.21 37 3 231
46-30×7 46 210 2950 70 37.58 45 3 248
46-30×8 46 240 2950 70 42.95 55 3 265
46-30×9 46 270 2950 70 48.32 55 3 282
46-30×10 46 300 2950 70 53.69 75 3 299
46-50×3 46 150 2950 63 29.83 37 2.8 264
46-50×4 46 200 2950 63 39.77 45 2.8 285
46-50×5 46 250 2950 63 49.71 55 2.8 307
46-50×6 46 300 2950 63 59.65 75 2.8 327
46-50×7 46 350 2950 63 69.6 75 2.8 348
46-50×8 46 400 2950 63 79.54 90 2.8 373
46-50×9 46 450 2950 63 89.48 110 2.8 390
46-50×10 46 500 2950 63 99.42 110 2.8 411
46-50×11 46 550 2950 63 109.36 132 2.8 432
46-50×12 46 600 2950 63 119.3 132 2.8 453
85-45×2 85 90 2950 72 28.94 37 4.2 199
85-45×3 85 135 2950 72 43.3 55 4.2 224
85-45×4 85 180 2950 72 57.87 75 4.2 250
85-45×5 85 225 2950 72 72.34 90 4.2 275
85-45×6 85 270 2950 72 86.81 110 4.2 300
85-45×7 85 315 2950 72 101.3 132 4.2 326
85-45×8 85 360 2950 72 115.7 132 4.2 351
85-45×9 85 405 2950 72 130.2 160 4.2 376
85-67×3 85 201 2950 65 71.6 90 4.4 846
85-67×4 85 268 2950 65 95.4 110 4.4 964
85-67×5 85 335 2950 65 119.3 132 4.4 1126
85-67×6 85 402 2950 65 143.2 160 4.4 1434
85-67×7 85 469 2950 65 167 185 4.4 1556
85-67×8 85 536 2950 65 190.9 220 4.4 1624
85-67×9 85 603 2950 65 214.7 250 4.4 1840
155-30×2 155 60 1480 75 33.77 55 3.9 490
155-30×3 155 90 1480 75 50.65 75 3.9 560
155-30×4 155 120 1480 75 67.54 90 3.9 630
155-30×5 155 150 1480 75 84.42 110 3.9 700
155-30×6 155 180 1480 75 101.3 132 3.9 770
155-30×7 155 210 1480 75 118.2 160 3.9 840
155-30×8 155 240 1480 75 135.1 180 3.9 910
155-30×9 155 270 1480 75 152 180 3.9 980
155-30×10 155 300 1480 75 168.8 225 3.9 1050
155-67×3 155 201 2950 74 114.7 132 5 925
155-67×4 155 268 2950 74 152.9 185 5 1042
155-67×5 155 335 2950 74 191.1 220 5 1145
155-67×6 155 402 2950 74 229.3 275 5 1435
155-67×7 155 469 2950 74 267.5 350 5 1558
155-67×8 155 536 2950 74 304.7 350 5 1700
155-67×9 155 603 2950 74 344 440 5 1860
280-43×2 280 86 1480 77 85.17 110 4.7 667
280-43×3 280 129 1480 77 127.7 150 4.7 787
280-43×4 280 172 1480 77 170.3 230 4.7 908
280-43×5 280 215 1480 77 212.9 300 4.7 1028
280-43×6 280 258 1480 77 255.5 300 4.7 1149
280-43×7 280 301 1480 77 298.1 350 4.7 1271
280-43×8 280 344 1480 77 304.7 410 4.7 1391
280-43×9 280 387 1480 77 383.2 430 4.7 1512

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