Product Overview
D Series Horizontal Multistage Centrifugal Pump is a horizontal sectional high-pressure centrifugal pump designed for clean water transfer.
It is engineered to deliver stable high head under continuous-duty operation where elevation lift and pipeline friction losses must be overcome.
It is applied in industrial water supply, boiler feed systems, mine drainage and municipal long-distance water conveyance.
✔ Hydraulic performance curves and duty-based technical selection data are available for engineering evaluation.
Model Designation
Application
- Industrial clean water transfer requiring high discharge pressure
- Boiler feed systems with multi-stage pressure build-up demand
- Mine drainage with long horizontal pipelines
- Municipal water transfer stations with elevation differences
- Cooling water circulation systems requiring stable high head
Engineering Advantages
- Sectional casing structure with tie-bolt compression ensures structural integrity under high pressure.
- Multistage impeller arrangement enables high head output with controlled hydraulic efficiency.
- Double-bearing support improves rotor stability and reduces vibration.
- Replaceable wear rings minimize casing wear and extend service life.
- Axial force balancing design reduces bearing load and enhances operational stability.
✔ Designed for high-pressure clean water systems requiring structural rigidity, hydraulic stability and continuous-duty reliability.
System Components
D Series Horizontal Multistage Centrifugal Pump：
- Electric motor
- Pump shaft
- Multistage impellers
- Diffusers / guide vanes
- Sectional pump casings
- Suction and discharge casing
- Bearing housing assembly
- Mechanical seal or packing seal
- Base frame and coupling
The sectional assembly design facilitates high-pressure containment and staged hydraulic energy conversion.
Technical Specifications
Service Conditions
- Medium: Clean water or non-corrosive liquids similar to water
- Liquid without solid particles
- pH range: 6 – 9
- Ambient temperature: ≤ 40°C
- Continuous-duty operation (S1)
Operating Conditions
Flow rate: 6.3 – 450 m³/h
Head: 50 – 650 m
Power range: 2.2 – 560 kW
Speed: 1450 / 2900 rpm
Liquid temperature: ≤ 80°C (standard), higher temperature available
Working pressure: ≤ 6.0 MPa
Detailed parameter tables are provided below.
Installation & Dimensions
Outline Drawing
Performance Data
| 1 | Bearing Cover | 2 | Nut | 3 | Bearing | 4 | Water Baffle Sleeve | 5 | Bearing Bracket | 6 | Front Shaft Sleeve | 7 | Packing Gland | 8 | Packing Ring |
| 9 | Suction Section | 10 | Intermediate Sleeve | 11 | Seal Ring | 12 | Impeller | 13 | Middle Section | 14 | Diffuser Baffle | 15 | Diffuser Sleeve | 16 | Tightening Bolt |
| 17 | Discharge Diffuser | 18 | Balance Ring | 19 | Balance Ring | 20 | Balance Plate | 21 | Discharge Section | 22 | Tail Cover | 23 | Shaft | 24 | Rear Shaft Sleeve |
Performance Parameters
| Model | Stages | Flow (Q) | Head (m) | Speed (r/min) | Power (kW) | NPSHr (m) | Efficiency η (%) | ||
| m³/h | L/s | Shaft Power | Motor Power | ||||||
| 50D8×2 | 2 | 18 | 5 | 19 | 2950 | 1.5 | 2.2 | 2.3 | 62 |
| 50D8×3 | 3 | 18 | 5 | 28.5 | 2950 | 2.25 | 3 | 2.3 | 62 |
| 50D8×4 | 4 | 18 | 5 | 38 | 2950 | 3 | 4 | 2.3 | 62 |
| 50D8×5 | 5 | 18 | 5 | 47.5 | 2950 | 3.75 | 5.5 | 2.3 | 62 |
| 50D8×6 | 6 | 18 | 5 | 57 | 2950 | 4.5 | 5.5 | 2.3 | 62 |
| 50D8×7 | 7 | 18 | 5 | 66.5 | 2950 | 5.25 | 7.5 | 2.3 | 62 |
| 50D8×8 | 8 | 18 | 5 | 76 | 2950 | 6 | 7.5 | 2.3 | 62 |
| 50D8×9 | 9 | 18 | 5 | 85.5 | 2950 | 6.75 | 7.5 | 2.3 | 62 |
| 50D8×10 | 10 | 18 | 5 | 95 | 2950 | 7.5 | 11 | 2.3 | 62 |
| 50D8×11 | 11 | 18 | 5 | 104.5 | 2950 | 8.25 | 11 | 2.3 | 62 |
| 50D8×12 | 12 | 18 | 5 | 114 | 2950 | 9 | 11 | 2.3 | 62 |
| Model | Stages | Flow (Q) | Head (m) | Speed (r/min) | Power (kW) | NPSHr (m) | Efficiency η (%) | ||
| m³/h | L/s | Shaft Power | Motor Power | ||||||
| 80D12×2 | 2 | 32.4 | 9 | 22.7 | 2950 | 2.68 | 3 | 2.8 | 75 |
| 80D12×3 | 3 | 32.4 | 9 | 34.05 | 2950 | 4.02 | 5.5 | 2.8 | 75 |
| 80D12×4 | 4 | 32.4 | 9 | 45.4 | 2950 | 5.36 | 7.5 | 2.8 | 75 |
| 80D12×5 | 5 | 32.4 | 9 | 56.75 | 2950 | 6.7 | 7.5 | 2.8 | 75 |
| 80D12×6 | 6 | 32.4 | 9 | 68.1 | 2950 | 8.04 | 11 | 2.8 | 75 |
| 80D12×7 | 7 | 32.4 | 9 | 79.45 | 2950 | 9.38 | 11 | 2.8 | 75 |
| 80D12×8 | 8 | 32.4 | 9 | 90.8 | 2950 | 10.72 | 15 | 2.8 | 75 |
| 80D12×9 | 9 | 32.4 | 9 | 102.15 | 2950 | 11.06 | 15 | 2.8 | 75 |
| 80D12×10 | 10 | 32.4 | 9 | 113.5 | 2950 | 13.4 | 15 | 2.8 | 75 |
| 80D12×11 | 11 | 32.4 | 9 | 124.85 | 2950 | 14.74 | 18.5 | 2.8 | 75 |
| 80D12×12 | 12 | 32.4 | 9 | 136.2 | 2950 | 16.08 | 18.5 | 2.8 | 75 |
| Model | Stages | Flow (Q) | Head (m) | Speed (r/min) | Power (kW) | NPSHr (m) | Efficiency η (%) | ||
| m³/h | L/s | Shaft Power | Motor Power | ||||||
| 100D16×2 | 2 | 54 | 15 | 35.2 | 2950 | 7.2 | 11 | 3.3 | 71.5 |
| 100D16×3 | 3 | 54 | 15 | 52.8 | 2950 | 10.8 | 15 | 3.3 | 71.5 |
| 100D16×4 | 4 | 54 | 15 | 70.4 | 2950 | 14.4 | 18.5 | 3.3 | 71.5 |
| 100D16×5 | 5 | 54 | 15 | 88 | 2950 | 18 | 22 | 3.3 | 71.5 |
| 100D16×6 | 6 | 54 | 15 | 105.6 | 2950 | 21.6 | 30 | 3.3 | 71.5 |
| 100D16×7 | 7 | 54 | 15 | 123.2 | 2950 | 25.2 | 30 | 3.3 | 71.5 |
| 100D16×8 | 8 | 54 | 15 | 140.8 | 2950 | 28.8 | 37 | 3.3 | 71.5 |
| 100D16×9 | 9 | 54 | 15 | 158.4 | 2950 | 32.4 | 37 | 3.3 | 71.5 |
| 100D16×10 | 10 | 54 | 15 | 176 | 2950 | 36 | 45 | 3.3 | 71.5 |
| 100D16×11 | 11 | 54 | 15 | 198.6 | 2950 | 39.6 | 55 | 3.3 | 71.5 |
| 100D16×12 | 12 | 54 | 15 | 211.2 | 2950 | 43.2 | 55 | 3.3 | 71.5 |
| Model | Stages | Flow (Q) | Head (m) | Speed (r/min) | Power (kW) | NPSHr (m) | Efficiency η (%) | ||
| m³/h | L/s | Shaft Power | Motor Power | ||||||
| 125D25×2 | 2 | 108 | 30 | 40 | 2950 | 15.6 | 18.5 | 4 | 76 |
| 125D25×3 | 3 | 108 | 30 | 60 | 2950 | 23.4 | 30 | 4 | 76 |
| 125D25×4 | 4 | 108 | 30 | 80 | 2950 | 31.2 | 37 | 4 | 76 |
| 125D25×5 | 5 | 108 | 30 | 100 | 2950 | 39 | 45 | 4 | 76 |
| 125D25×6 | 6 | 108 | 30 | 120 | 2950 | 46.8 | 55 | 4 | 76 |
| 125D25×7 | 7 | 108 | 30 | 140 | 2950 | 54.6 | 75 | 4 | 76 |
| 125D25×8 | 8 | 108 | 30 | 160 | 2950 | 62.4 | 75 | 4 | 76 |
| 125D25×9 | 9 | 108 | 30 | 180 | 2950 | 70.3 | 90 | 4 | 76 |
| 125D25×10 | 10 | 108 | 30 | 200 | 2950 | 78 | 90 | 4 | 76 |
| Model | Stages | Flow (Q) | Head (m) | Speed (r/min) | Power (kW) | NPSHr (m) | Efficiency η (%) | ||
| m³/h | L/s | Shaft Power | Motor Power | ||||||
| 150D30×2 | 2 | 162 | 45 | 54.6 | 2950 | 31.46 | 37 | 4.1 | 76.6 |
| 150D30×3 | 3 | 162 | 45 | 81.9 | 2950 | 47.19 | 55 | 4.1 | 76.6 |
| 150D30×4 | 4 | 162 | 45 | 109.2 | 2950 | 62.92 | 75 | 4.1 | 76.6 |
| 150D30×5 | 5 | 162 | 45 | 136.5 | 2950 | 78.65 | 90 | 4.1 | 76.6 |
| 150D30×6 | 6 | 162 | 45 | 163.8 | 2950 | 94.38 | 110 | 4.1 | 76.6 |
| 150D30×7 | 7 | 162 | 45 | 191.1 | 2950 | 110.11 | 132 | 4.1 | 76.6 |
| 150D30×8 | 8 | 162 | 45 | 218.4 | 2950 | 125.84 | 160 | 4.1 | 76.6 |
| 150D30×9 | 9 | 162 | 45 | 245.7 | 2950 | 141.57 | 160 | 4.1 | 76.6 |
Installation Diagram
Performance Data（2）
| Model | Stages | L | L1 | L2 | L3 | L4 | L5 | B | B1 | H | H1 | H2 | H3 | H4 | n-φd |
| 50D8×2 | 2 | 960 | 65 | 490 | 730 | 135 | 345 | 355 | 290 | 230 | 160 | 90 | 100 | 25 | 4-φ20 |
| 50D8×3 | 3 | 1163 | 113 | 550 | 815 | 145 | 390 | 360 | 300 | 240 | 160 | 100 | 145 | 25 | 4-φ20 |
| 50D8×4 | 4 | 1141 | 136 | 580 | 890 | 180 | 410 | 360 | 340 | 242 | 160 | 112 | 153 | 25 | 4-φ20 |
| 50D8×5 | 5 | 1274 | 226 | 710 | 1120 | 270 | 485 | 370 | 370 | 242 | 160 | 132 | 183 | 25 | 4-φ20 |
| 50D8×6 | 6 | 1332 | 226 | 710 | 1120 | 270 | 485 | 370 | 370 | 242 | 160 | 132 | 183 | 25 | 4-φ20 |
| 50D8×7 | 7 | 1390 | 226 | 710 | 1120 | 270 | 485 | 370 | 370 | 242 | 160 | 132 | 183 | 25 | 4-φ20 |
| 50D8×8 | 8 | 1448 | 310 | 770 | 1230 | 300 | 485 | 370 | 370 | 242 | 160 | 132 | 183 | 25 | 4-φ20 |
| 50D8×9 | 9 | 1508 | 310 | 770 | 1230 | 300 | 485 | 370 | 370 | 242 | 160 | 132 | 183 | 25 | 4-φ20 |
| 50D8×10 | 10 | 1689 | 362 | 949 | 1515 | 420 | 610 | 370 | 405 | 255 | 160 | 160 | 225 | 25 | 4-φ20 |
| 50D8×11 | 11 | 1747 | 362 | 940 | 1515 | 420 | 610 | 370 | 405 | 255 | 160 | 160 | 225 | 25 | 4-φ20 |
| 50D8×12 | 12 | 1805 | 362 | 940 | 1515 | 420 | 610 | 370 | 405 | 255 | 160 | 160 | 225 | 25 | 4-φ20 |
| Model | Stages | L | L1 | L2 | L3 | L4 | L5 | B | B1 | H | H1 | H2 | H3 | H4 | n-φd |
| 80D12×2 | 2 | 1139 | 121 | 610 | 860 | 130 | 390 | 410 | 300 | 245 | 210 | 100 | 145 | 25 | 4-φ20 |
| 80D12×3 | 3 | 1304 | 232 | 770 | 1130 | 235 | 485 | 410 | 365 | 247 | 210 | 132 | 183 | 25 | 4-φ20 |
| 80D12×4 | 4 | 1374 | 232 | 770 | 1130 | 235 | 485 | 410 | 365 | 247 | 210 | 132 | 183 | 25 | 4-φ20 |
| 80D12×5 | 5 | 1444 | 232 | 770 | 1130 | 235 | 485 | 410 | 365 | 247 | 210 | 132 | 183 | 25 | 4-φ20 |
| 80D12×6 | 6 | 1639 | 273 | 990 | 1385 | 230 | 610 | 410 | 410 | 260 | 210 | 160 | 225 | 25 | 4-φ20 |
| 80D12×7 | 7 | 1709 | 273 | 990 | 3185 | 230 | 610 | 410 | 410 | 260 | 210 | 160 | 225 | 25 | 4-φ20 |
| 80D12×8 | 8 | 1779 | 403 | 1020 | 1600 | 415 | 610 | 410 | 410 | 260 | 210 | 160 | 225 | 25 | 4-φ20 |
| 80D12×9 | 9 | 1849 | 403 | 1020 | 1600 | 415 | 610 | 410 | 410 | 260 | 210 | 160 | 225 | 25 | 4-φ20 |
| 80D12×10 | 10 | 1919 | 403 | 1020 | 1600 | 415 | 610 | 410 | 410 | 260 | 210 | 160 | 225 | 25 | 4-φ20 |
| 80D12×11 | 11 | 2034 | 471 | 1110 | 1775 | 480 | 655 | 410 | 410 | 260 | 210 | 160 | 225 | 25 | 4-φ20 |
| 80D12×12 | 2104 | 471 | 1110 | 1775 | 480 | 655 | 410 | 410 | 260 | 210 | 160 | 225 | 25 | 4-φ20 | |
| Model | Stages | L | L1 | L2 | L3 | L4 | L5 | B | B1 | H | H1 | H2 | H3 | H4 | n-φd |
| 100D16×2 | 2 | 1395 | 131 | 785 | 1175 | 225 | 615 | 450 | 450 | 280 | 220 | 160 | 225 | 30 | 4-φ20 |
| 100D16×3 | 3 | 1475 | 131 | 785 | 1175 | 225 | 615 | 450 | 450 | 280 | 220 | 160 | 225 | 30 | 4-φ20 |
| 100D16×4 | 4 | 1600 | 191 | 865 | 1300 | 245 | 660 | 450 | 450 | 280 | 220 | 160 | 225 | 30 | 4-φ20 |
| 100D16×5 | 5 | 1705 | 231 | 910 | 1380 | 285 | 695 | 450 | 450 | 300 | 220 | 180 | 250 | 30 | 4-φ20 |
| 100D16×6 | 6 | 1890 | 292 | 1015 | 1620 | 385 | 790 | 485 | 485 | 310 | 220 | 200 | 275 | 35 | 4-φ20 |
| 100D16×7 | 7 | 1970 | 292 | 1015 | 1620 | 385 | 790 | 485 | 485 | 310 | 220 | 200 | 275 | 35 | 4-φ20 |
| 100D16×8 | 8 | 2050 | 372 | 1095 | 1780 | 465 | 790 | 485 | 485 | 310 | 220 | 200 | 275 | 35 | 4-φ20 |
| 100D16×9 | 9 | 2130 | 372 | 1095 | 1780 | 465 | 790 | 485 | 485 | 310 | 220 | 200 | 275 | 35 | 4-φ20 |
| 100D16×10 | 10 | 2250 | 433 | 1175 | 1885 | 485 | 830 | 450 | 515 | 335 | 220 | 225 | 305 | 35 | 4-φ20 |
| 100D16×11 | 11 | 2445 | 491 | 1325 | 2150 | 590 | 945 | 455 | 580 | 360 | 220 | 250 | 325 | 35 | 4-φ20 |
| 100D16×12 | 12 | 2525 | 491 | 1325 | 2150 | 590 | 945 | 455 | 580 | 360 | 220 | 250 | 325 | 35 | 4-φ20 |
| Model | Stages | L | L1 | L2 | L3 | L4 | L5 | B | B1 | H | H1 | H2 | H3 | H4 | n-φd |
| 125D25×2 | 2 | 1619 | 151 | 855 | 1230 | 185 | 660 | 530 | 420 | 330 | 270 | 160 | 225 | 40 | 4-φ24 |
| 125D25×3 | 3 | 1849 | 225.5 | 980 | 1510 | 310 | 790 | 530 | 485 | 330 | 270 | 200 | 275 | 40 | 4-φ24 |
| 125D25×4 | 4 | 1949 | 225.5 | 980 | 1510 | 310 | 790 | 530 | 485 | 330 | 270 | 200 | 275 | 40 | 4-φ24 |
| 125D25×5 | 5 | 2089 | 300 | 1075 | 1635 | 335 | 830 | 540 | 540 | 345 | 270 | 225 | 305 | 40 | 4-φ24 |
| 125D25×6 | 6 | 2304 | 351.5 | 1190 | 1835 | 385 | 945 | 540 | 590 | 370 | 270 | 250 | 325 | 40 | 4-φ24 |
| 125D25×7 | 7 | 2486 | 627 | 1510 | 2115 | 310 | 1018 | 540 | 640 | 400 | 270 | 280 | 360 | 40 | 4-φ24 |
| 125D25×8 | 8 | 2586 | 627 | 1510 | 2115 | 310 | 1018 | 540 | 640 | 400 | 270 | 280 | 360 | 40 | 4-φ24 |
| 125D25×9 | 9 | 2736 | 779 | 1680 | 2370 | 360 | 1068 | 540 | 640 | 400 | 270 | 280 | 360 | 40 | 4-φ24 |
| 125D25×10 | 10 | 2836 | 779 | 1680 | 2370 | 360 | 1068 | 540 | 640 | 400 | 270 | 280 | 360 | 40 | 4-φ24 |
| Model | Stages | L | L1 | L2 | L3 | L4 | L5 | B | B1 | H | H1 | H2 | H3 | H4 | n-φd |
| 150D30×2 | 2 | 1859 | 193 | 975 | 1410 | 205 | 793 | 600 | 500 | 380 | 320 | 200 | 275 | 45 | 4-φ24 |
| 150D30×3 | 3 | 2129 | 249 | 1120 | 1650 | 265 | 948 | 600 | 600 | 380 | 320 | 250 | 325 | 45 | 4-φ24 |
| 150D30×4 | 4 | 2314 | 306 | 1210 | 1835 | 325 | 1018 | 600 | 650 | 390 | 320 | 280 | 360 | 45 | 4-φ24 |
| 150D30×5 | 5 | 2479 | 365 | 1290 | 2000 | 380 | 1068 | 600 | 650 | 400 | 320 | 280 | 360 | 45 | 4-φ24 |
| 150D30×6 | 6 | / | / | / | / | / | / | / | / | / | / | / | / | / | / |
| 150D30×7 | 7 | / | / | / | / | / | / | / | / | / | / | / | / | / | / |
| 150D30×8 | 8 | / | / | / | / | / | / | / | / | / | / | / | / | / | / |
| 150D30×9 | 9 | / | / | / | / | / | / | / | / | / | / | / | / | / | / |
Outline Drawing（2）
 |
Dimensions | Suction Flange | Discharge Flange | ||||||
| Model | Dg | Do | D | n-do | Dg | Do | D | n-do | |
| 50D8 | 75 | 150 | 185 | 4-φ18 | 50 | 125 | 160 | 4-φ18 | |
| 80D12 | 80 | 150 | 185 | 4-φ18 | 80 | 160 | 195 | 4-φ18 | |
| 100D16 | 100 | 170 | 205 | 4-φ18 | 100 | 180 | 215 | 8-φ18 | |
| 125D25 | 125 | 200 | 235 | 8-φ18 | 125 | 210 | 245 | 8-φ18 | |
| 150D30 | 150 | 225 | 260 | 8-φ18 | 150 | 240 | 280 | 8-φ18 | |
Pump Head Equation:
Hydraulic Parameters and Installation Height Calculation
- P₁: Inlet pressure of the pump (MPa)
- P₂: Outlet pressure of the pump (MPa)
- Z₁: Vertical distance from the inlet pressure gauge to the pump shaft centerline (m)
- Z₂: Vertical distance from the outlet pressure gauge to the pump shaft centerline (m)
- V₁: Flow velocity at the inlet measurement point (m/s)
- V₂: Flow velocity at the outlet measurement point (m/s)
- ρ: Liquid density (kg/m³)
- g: Gravitational acceleration (9.8 m/s²)
Calculation of Pump Installation Height (Hg)
Hg refers to the vertical distance from the pump shaft centerline to the inlet liquid level and can be estimated by the following formula:
Hg ≤ P₀ − [NPSH] − P′ − Δh − 0.5 (m)
Where:
- P₀: Atmospheric pressure (or absolute pressure at the suction liquid surface), in meters of water column
- [NPSH]: Net Positive Suction Head required by the pump (m)
- P′: Vapor pressure of the pumped liquid (m water column)
- Δh: Hydraulic loss in the suction pipeline (m)
Note:
If Hg is positive, the pump shaft centerline is located above the liquid level (suction lift).
If Hg is negative, the pump operates under flooded suction conditions (submerged inlet).
Performance Dependency
The actual values of pump flow rate (Q), head (H), and shaft power (N) depend on the actual running speed of the pump.
Pump Head Equation:（2）
How to Select a Pump Model
- Determine rated flow rate according to system demand.
- Calculate total dynamic head including static lift, pipeline losses and pressure margin.
- Verify working pressure does not exceed 6.0 MPa.
- Confirm available NPSH meets pump requirement to prevent cavitation.
- Select rotational speed based on efficiency and operating stability considerations.
✔ Pump model selection shall be based on hydraulic curve matching, pressure verification and NPSH evaluation.
Engineering Notes
- Not suitable for liquids containing solids or fibrous materials.
- Long pipeline systems should include non-return valves and pressure relief devices.
- Ensure adequate lubrication of bearing assembly during operation.
- Shaft alignment tolerance must be verified after installation.
Compliance & Quality Assurance
- Factory hydraulic performance testing
- Hydrostatic pressure testing of casing assembly
- Rotor dynamic balance inspection
- Bearing clearance and vibration verification
- Material traceability documentation
- Optional third-party inspection available
Safety Notice
- Do not operate under dry-running condition
- Ensure suction system is properly primed before startup
- Disconnect power before maintenance
- Do not exceed rated discharge pressure
OEM & Customization
This pump series supports engineered configuration and duty-based matching. Technical adjustments can be made according to system requirements and installation conditions.
Available options include:
• Motor voltage & frequency
• Mechanical seal or packing seal configuration
• Wetted parts material selection
• Bearing lubrication method
• Surface coating and corrosion protection
Configuration is determined based on duty point and project specifications.
FAQs
Q: Can the pump operate under VFD control?
A: Yes, operation under VFD is permitted within rated hydraulic limits.
Q: What is the maximum allowable working pressure?
A: The maximum allowable working pressure is 6.0 MPa.
Q: What seal options are available?
A: Mechanical seal and packing seal configurations are available.
Q: Is the pump suitable for boiler feed systems?
A: Yes, provided temperature and pressure remain within specified limits.
Q: What rotational speeds are available?
A: Standard speeds are 1450 rpm and 2900 rpm.
Q: How is axial thrust controlled?
A: The pump adopts axial balancing design to reduce thrust load.
Q: What type of medium is permitted?
A: Clean water or non-corrosive liquids without solid particles.