D Series Horizontal Multistage Centrifugal Pump High Pressure

D Series Horizontal Multistage Centrifugal Pump High Pressure

D Series Horizontal Multistage Centrifugal Pump (High-Head) | Segmental multistage design for stable high-pressure transfer

  • High-head multistage boosting: Stage-built pressure rise for demanding high-head duties.
  • Segmental casing structure: Modular stage sections for duty matching and overhaul efficiency.
  • Stable continuous-duty running: Rigid rotor support for smooth operation and controlled vibration.
  • Service-ready configuration: Standard wear parts and seal options for easy maintenance.
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Product Overview 

D Series Horizontal Multistage Centrifugal Pump is a segmented horizontal multistage centrifugal pump designed for high-pressure clean water transfer in industrial and municipal systems.

It solves the problem of insufficient pressure in long-distance pipeline transport and high-rise water supply by providing staged pressure boosting with stable hydraulic performance.

It is applied in boiler feedwater systems, high-rise building water supply, mine drainage, and municipal pressure boosting networks.

✔ For high-head water transfer systems requiring stable pressure and continuous operation under multi-stage boosting conditions

Model Designation

D Series Horizontal Multistage Centrifugal Pump High Pressure

Applications

Typical Operating Scenarios

• Long-distance clean water pipeline transfer requiring high discharge head

• High-rise building domestic water supply with multi-stage boosting

• Mine drainage where high vertical lift is required

• Industrial boiler feedwater supply under stable flow conditions

• Municipal pressure boosting stations for elevated distribution networks

Engineering Advantages

Structural Design Logic & Engineering Outcome

• Segmented multistage structure enables flexible head configuration according to duty requirements.

• Radial balanced impeller arrangement reduces axial thrust and improves bearing life.

• Wear-resistant internal components ensure durability under continuous high-pressure operation.

• Horizontally mounted configuration simplifies alignment and maintenance access.

✔ Performance selection must be based on calculated duty point, NPSH margin, and required discharge pressure.

System Components

D Series Horizontal Multistage Centrifugal Pump：

• Pump casing (segmented stage construction)

• Multistage impellers and diffusers

• Shaft and bearing assembly

• Mechanical seal or packing sealing system

• Suction and discharge nozzles

Technical Specifications

Service Conditions

Suitable for clean water or liquids with similar physical and chemical properties.

Solid content should be minimal and non-abrasive unless specially configured.

Operating Conditions

Flow Rate: 18 – 162 m³/h
Head: 19 – 245.7 m
Power Range: 2.2 – 160 kW
Speed: 2950 rpm
Liquid Temperature: ≤ 80°C (standard configuration)
Working Pressure: ≤ 8.0 MPa

Detailed parameter tables are provided below.

Installation & Dimensions

Outline Drawing

D Series Horizontal Multistage Centrifugal Pump High Pressure

Performance Data

1 Bearing Cover 2 Nut 3 Bearing 4 Water Deflector Sleeve 5 Bearing Bracket 6 Shaft Sleeve (A) 7 Packing Gland 8 Lantern Ring
9 Suction Casing 10 Intermediate Sleeve 11 Wear Ring 12 Impeller 13 Middle Casing 14 Diffuser Baffle 15 Diffuser Sleeve 16 Tension Bolt
17 Outlet Diffuser 18 Balance Ring 19 Balance Ring 20 Balance Disc 21 Discharge Casing 22 Tail Cover 23 Shaft 24 Shaft Sleeve (B)

Performance Parameters

Model Stages Flow Rate (Q) Head (m) Speed (r/min) Power (kW) NPSH (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 Rate (Q) Head (m) Speed (r/min) Power (kW) NPSH (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 Rate (Q) Head (m) Speed (r/min) Power (kW) NPSH (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 Rate (Q) Head (m) Speed (r/min) Power (kW) NPSH (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 Rate (Q) Head (m) Speed (r/min) Power (kW) NPSH (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

D Series Horizontal Multistage Centrifugal Pump High Pressure

Performance Data（2）

Model Number of 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 Number of 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 Number of 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 Number of 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 Number of 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）

D Series Horizontal Multistage Centrifugal Pump High Pressure

Performance Data（3）

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

How to Select a Pump Model

• Determine required flow rate and total dynamic head based on pipeline calculation.

• Confirm suction condition and available NPSH to prevent cavitation.

• Select stage number according to required discharge pressure.

• Choose sealing type (mechanical seal or packing) based on operating temperature and maintenance strategy.

• Verify motor power against hydraulic power demand and service factor.

✔ Final selection must match system resistance curve and operating stability requirements.

Engineering Notes

• Pump should operate within rated performance range to avoid vibration and efficiency loss.

• Alignment accuracy directly influences bearing and seal lifespan.

• System piping must avoid excessive stress transmission to pump casing.

• High-head models require verification of casing pressure rating before commissioning.

Compliance & Quality Assurance

• Factory hydraulic performance testing for each pump unit

• Pressure resistance testing of pump casing

• Dynamic balancing of rotating components

• Material traceability for shaft, impeller, and casing

• Optional third-party inspection per project specification

Safety Notice

• Do not operate under dry-running condition.

• Ensure suction valve is fully open before startup.

• Do not exceed maximum allowable working pressure.

• Disconnect electrical power before maintenance.

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 type and configuration
• Wetted parts material selection
• Surface coating and corrosion protection

Configuration is determined based on duty point and project specifications.

FAQs

Q1: Can the D Series pump operate under VFD control?
Yes, VFD control is supported to adjust flow and pressure according to system demand.

Q2: What is the maximum allowable working pressure?
The maximum working pressure is ≤ 8.0 MPa depending on model configuration.

Q3: How is axial thrust balanced in multistage configuration?
Axial thrust is minimized through staged impeller design and balancing methods.

Q4: Is this pump suitable for hot water applications?
Standard configuration allows liquid temperature ≤ 80°C; higher temperatures require special materials.

Q5: What sealing options are available?
Mechanical seal and packing seal options are available depending on operating conditions.

Q6: How many stages can be configured?
Stage number is determined according to required total head and pressure rating.

Q7: What standards does this pump comply with?
Manufacturing and testing follow relevant hydraulic performance and pressure testing standards.