GC Horizontal Multistage Boiler Feed Pump High Pressure

GC Horizontal Multistage Boiler Feed Pump High Pressure

GC Horizontal Multistage Boiler Feed Pump | Segmental multistage design for high-pressure feedwater duty

  • Boiler feed / hot-water duty: For boiler make-up and high-pressure clean-water transfer.
  • Segmental multistage build: Stage configuration to match required system pressure with stable output.
  • Axial-thrust balancing: Balance device reduces axial load for continuous-duty stability.
  • Service-ready construction: Replaceable wear parts with clear maintenance access.
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Product Overview 

GC Horizontal Multistage Boiler Feed Pump is a high-efficiency, horizontal multistage centrifugal pump designed for continuous operation in boiler feedwater and makeup water systems.

It addresses the challenge of maintaining consistent pressure and flow rates in high-pressure, high-temperature conditions, ensuring uninterrupted boiler operation.

It is used in power plants, industrial boiler systems, chemical processing, and municipal water supply networks.

✔ For high-efficiency boiler feed systems requiring reliable, high-head water supply in industrial and power plant applications

Model Designation

GC Horizontal Multistage Boiler Feed Pump High Pressure

Applications

Typical Operating Scenarios

• Boiler feedwater systems in power plants

• Makeup water supply for industrial boilers

• High-pressure, high-flow chemical processing systems

• Water supply and pressure boosting in municipal infrastructure

• Cooling water systems for power generation

Engineering Advantages

Structural Design Logic & Engineering Outcome

• Horizontal multistage design provides high head and stable flow for efficient water transfer.

• Modular structure for easy maintenance and part replacement without dismantling entire system.

• The robust casing and corrosion-resistant materials extend the service life of the pump in harsh boiler environments.

• The pump’s dual-suction inlet design minimizes cavitation risks and enhances operational efficiency.

✔ For detailed specifications and performance charts, refer to the technical parameter section below.

System Components

GC Horizontal Multistage Boiler Feed Pump ：

• Multistage pump casing and stage components

• Impellers and diffusers for high-efficiency energy transfer

• Mechanical seal and bearing assembly

• Horizontal shaft and coupling system

• Discharge nozzle and inlet connections

Technical Specifications

Service Conditions

Suitable for clean water or liquids with similar properties.

Not suitable for slurry or highly viscous fluids unless customized.

Operating Conditions

Flow Rate: 6 – 55 m³/h
Head: 46 – 576 m
Power Range: 3 – 100 kW
Speed: 2920 – 2950 rpm
Liquid Temperature: ≤ 120°C
Working Pressure: ≤ 2.5 MPa

*Based on current available models shown in performance table • GC horizontal multistage boiler feed pump • Head = single stage head × stage count • Higher flow configurations available on request

Detailed parameter tables are provided below.

Installation & Dimensions

Outline Drawing

GC Horizontal Multistage Boiler Feed Pump High Pressure

Performance Data

1 Shaft Sleeve Nut 2 Bearing Cover 3 Bearing 4 Front Bearing Housing 5 Shaft Sleeve (A) 6 Packing Gland 7 Lantern Ring
8 Wear Ring 9 Suction Casing 10 Impeller 11 Middle Casing 12 Return Pipe 13 Discharge Casing 14 Balance Ring
15 Balance Disc 16 Tail Cover 17 Shaft Sleeve (B) 18 Shaft 19 Round Nut 20 Tension Bolt

Performance Parameters

Model Stages Flow Rate Q Total Head H Speed n Power N (kW) Efficiency η NPSH Impeller Diameter Weight
m3/h L/S m r/min Shaft Power Motor Power (kW) % m mm Kg
11/2GC-5 2 6 1.66 46 2950 2 3 38 3.7 136 135
11/2GC-5 3 6 1.66 69 2920 3 4 38 3.7 136 147
11/2GC-5 4 6 1.66 92 2920 4 5.5 38 3.7 136 174
11/2GC-5 5 6 1.66 115 2920 5 7.5 38 3.7 136 204
11/2GC-5 6 6 1.66 138 2920 6 7.5 38 3.7 136 212
11/2GC-5 7 6 1.66 161 2920 7 7.5 38 3.7 136 220
11/2GC-5 8 6 1.66 184 2920 8 11 38 3.7 136 271
11/2GC-5 9 6 1.66 207 2920 9 15 38 3.7 136 292
Model Stages Flow Rate Q Total Head H Speed n Power N (kW) Efficiency η NPSH Impeller Diameter Weight
m3/h L/S m r/min Shaft Power Motor Power (kW) % m mm Kg
2GC-5 2 10 2.8 64 2950 4.4 7.5 39.6 4.7 166 258
2GC-5 3 10 2.8 96 2950 6.6 11 39.6 4.7 166 309
2GC-5 4 10 2.8 128 2950 8.8 15 39.6 4.7 166 389
2GC-5 5 10 2.8 160 2950 11.0 15 39.6 4.7 166 414
2GC-5 6 10 2.8 192 2950 13.2 18.5 39.6 4.7 166 512
2GC-5 7 10 2.8 224 2950 15.4 22.0 39.6 4.7 166 531
2GC-5 8 10 2.8 256 2950 17.6 30.0 39.6 4.7 166 589
2GC-5 9 10 2.8 288 2950 19.8 30.0 39.6 4.7 166 609
Model Stages Flow Rate Q Total Head H Speed n Power N (kW) Efficiency η NPSH Impeller Diameter Weight
m3/h L/S m r/min Shaft Power Motor Power (kW) % m mm Kg
21/2GC-3.5 7
10
15
20
2.8
4.2
5.6
336
315
280
 2950
26
28.6
32.5
 37
35
45
47
3.3
3.8
4
 198 967
21/2GC-3.5 8
10
15
20
2.8
4.2
5.6
384
360
320
 2950
30
32.8
37
 45
35
45
47
3.3
3.8
4
 198 1065
21/2GC-3.5 9
10
15
20
2.8
4.2
5.6
432
405
360
 2950
33.7
37
42
 55
35
45
47
3.3
3.8
4
 198 1097
21/2GC-3.5 10
10
15
20
2.8
4.2
5.6
480
450
400
 2950
37.5
41
46.5
 55
35
45
47
3.3
3.8
4
 198 1179
21/2GC-3.5 11
10
15
20
2.8
4.2
5.6
528
495
440
 2950
41.5
45
51
 75
35
45
47
3.3
3.8
4
 198 1252
21/2GC-3.5 12
10
15
20
2.8
4.2
5.6
576
540
480
 2950
45
49
56
 75
35
45
47
3.3
3.8
4
 198 1324
Model Stages Flow Rate Q Total Head H Speed n Power N (kW) Efficiency η NPSH Impeller Diameter Weight
m3/h L/S m r/min Shaft Power Motor Power (kW) % m mm Kg
21/2GC-6 2
15
20
4.2
5.6
62
54
 2950
5.8
6.2
 7.5
43.7
47.4
5
5.3
 168 258
21/2GC-6 3
15
20
4.2
5.6
93
81
 2950
8.7
9.3
 15
43.7
47.4
5
5.3
 168 309
21/2GC-6 4
15
20
4.2
5.6
124
108
 2950
11.6
12.4
 18.5
43.7
47.4
5
5.3
 168 389
21/2GC-6 5
15
20
4.2
5.6
155
135
 2950
14.5
15.5
 22.0
43.7
47.4
5
5.3
 168 494
21/2GC-6 6
15
20
4.2
5.6
186
162
 2950
17.4
18.6
 22.0
43.7
47.4
5
5.3
 168 512
21/2GC-6 7
15
20
4.2
5.6
217
189
 2950
20.2
21.7
 30.0
43.7
47.4
5
5.3
 168 563
21/2GC-6 8
15
20
4.2
5.6
248
216
 2950
23.2
24.8
 30.0
43.7
47.4
5
5.3
 168 589
21/2GC-6 9
15
20
4.2
5.6
279
243
 2950
26.1
27.9
 37.0
43.7
47.4
5
5.3
 168 785
Model Stages Flow Rate Q Total Head H Speed n Power N (kW) Efficiency η NPSH Impeller Diameter Weight
m3/h L/S m r/min Shaft Power Motor Power (kW) % m mm Kg
4GC-8 2
30
45
55
8.3
12.5
15.3
86
82
79
 2950
13.8
16.8
18.1
 22
51
60
62.5
4.6
5
5.6
 192 503
4GC-8 3
30
45
55
8.3
12.5
15.3
129
123
114
 2950
20.7
25.2
27.2
 30
51
60
62.5
4.6
5
5.6
 192 612
4GC-8 4
30
45
55
8.3
12.5
15.3
172
164
152
 2950
27.6
33.6
35.2
 45
51
60
62.5
4.6
5
5.6
 192 835
4GC-8 5
30
45
55
8.3
12.5
15.3
215
205
190
 2950
34.5
42
45.3
 55
51
60
62.5
4.6
5
5.6
 192 950
4GC-8 6
30
45
55
8.3
12.5
15.3
258
246
228
 2950
41.4
50.4
54.4
 55
51
60
62.5
4.6
5
5.6
 192 1085
4GC-8 7
30
45
55
8.3
12.5
15.3
301
287
266
 2950
48.3
58.8
63.4
 75
51
60
62.5
4.6
5
5.6
 192 1087
4GC-8 8
30
45
55
8.3
12.5
15.3
344
328
304
 2950
55
67
73
 75
51
60
62.5
4.6
5
5.6
 192
4GC-8 9
30
45
55
8.3
12.5
15.3
387
369
342
 2950
62
75.5
82
 90
51
60
62.5
4.6
5
5.6
 192
4GC-8 10
30
45
55
8.3
12.5
15.3
430
410
380
 2950
69
84
91
 100
51
60
62.5
4.6
5
5.6
 192

Installation Diagram

GC Horizontal Multistage Boiler Feed Pump High Pressure

Performance Data（2）

Model Number of Stages A B C E H I J K L M N O P Q F n-φd
11/2GC-5 2 963 750 510 128 248 122.5 355 350 205 365 105 180 315 315 154 4-φ20
11/2GC-5 3 1033 805 535 125 248 172.5 355 358 205 405 115 190 355 355 154 4-φ20
11/2GC-5 4 1158 1010 715 135 248 222.5 360 393 205 415 135 210 365 365 47 4-φ20
11/2GC-5 5 1208 1010 715 135 248 272.5 360 393 205 415 135 210 365 365 97 4-φ20
11/2GC-5 6 1258 1010 715 135 248 322.5 360 393 205 415 135 210 365 365 147 4-φ20
11/2GC-5 7
1308
1433
1060
1180
715
760
135
170
 248 372.5 360
393
495
 205
415
470
135
163
210
255
 365
365
240
147
100
 4-φ20
11/2GC-5 8 1484 1280 785 170 248 422.5 395 470 205 470 165 255 365 420 95 4-φ20
11/2GC-5 9 1533 1280 785 170 248 472.5 395 470 205 470 165 255 365 420 145 4-φ20
Model Number of Stages A B C E H I J K L M N O P Q F n-φd
2GC-5 2 1227 915 650 135 325 160 480 443 255 490 135 210 430 430 211 4-φ24
2GC-5 3 1412 1160 790 165 325 220 485 490 255 480 165 255 430 430 141 4-φ24
2GC-5 4 1412 1160 790 165 325 280 485 490 255 480 165 255 430 430 201 4-φ24
2GC-5 5 1532 1220 820 165 325 340 485 490 255 480 165 255 430 430 201 4-φ24
2GC-5 6 1637 1320 860 185 325 400 485 490 255 480 165 255 430 430 203 4-φ24
2GC-5 7 1722 1380 900 200 325 460 480 510 255 515 180 285 455 455 209 4-φ24
2GC-5 8 1887 1575 1000 240 325 520 525 580 255 585 200 310 440 525 150 4-φ24
2GC-5 9 1947 1575 1000 240 325 580 525 580 255 585 200 310 440 525 210 4-φ24
Model Number of Stages A B C E H I J K L M N O P Q F n-φd
21/2GC-3.5 7 1937 1590 1030 225 385 470 608 598 295 600 200 310 540 540 195 4-φ24
21/2GC-3.5 8 1937 1675 1085 225 385 530 618 638 295 600 225 345 540 540 194 4-φ24
21/2GC-3.5 9 2212 1835 1170 265 385 590 643 683 295 600 250 385 540 610 192 4-φ24
21/2GC-3.5 10 2272 1895 1200 265 385 650 643 683 295 600 250 385 540 610 192 4-φ24
21/2GC-3.5 11 2402 2115 1280 320 385 710 675 750 295 715 280 410 530 655 131 4-φ24
21/2GC-3.5 12 2462 2115 1280 320 385 770 675 750 295 715 280 410 530 655 191 4-φ24
型号 Number of Stages A B C E H I J K L M N O P Q F n-φd
21/2GC-6 2 1227 915 650 135 325 160 480 443 255 490 135 210 430 430 211 4-φ24
21/2GC-6 3 1412 1160 790 165 325 220 485 490 255 480 165 255 430 430 141 4-φ24
21/2GC-6 4 1412 1160 790 165 325 280 485 490 255 480 165 255 430 430 201 4-φ24
21/2GC-6 5 1577 1320 860 185 325 340 485 490 255 480 165 255 430 430 143 4-φ24
21/2GC-6 6 1662 1380 900 200 325 400 480 510 255 515 180 285 455 455 149 4-φ24
21/2GC-6 7 1827 1575 1000 240 325 460 525 580 255 585 200 310 440 525 90 4-φ24
21/2GC-6 8 1887 1575 1000 240 325 520 525 580 255 585 200 310 440 525 150 4-φ24
21/2GC-6 9 1947 1575 1000 240 325 525 525 580 255 585 200 310 440 525 210 4-φ24
Model Number of Stages A B C E H I J K L M N O P Q F n-φd
4GC-8 2 1552 1230 845 190 385 190 610 575 295 600 180 285 540 480 185 4-φ24
4GC-8 3 1732 1385 925 225 385 265 610 600 295 600 200 310 540 540 185 4-φ24
4GC-8 4 1847 1485 980 235 385 340 620 640 295 600 225 345 540 540 184 4-φ24
4GC-8 5 2037 1735 1105 265 385 415 645 685 295 665 250 385 540 605 117.5 4-φ24
4GC-8 6 2112 1735 1105 265 385 490 645 685 295 665 250 385 540 605 192.5 4-φ24
4GC-8 7 2257 1955 1215 300 385 565 675 750 295 720 280 410 540 660 116.5 4-φ24
4GC-8 8 2332 1955 1215 300 385 640 675 750 295 720 280 410 540 660 191.5 4-φ24
4GC-8 9 2457 2080 1295 325 385 715 675 750 295 720 280 410 540 660 191.5 4-φ24

Outline Drawing（2）

GC Horizontal Multistage Boiler Feed Pump High Pressure

Performance Data（2）

Dimension Suction Flange
Model Dg Do D n–do
11/2GC-5 40 115 145 4-φ18
2GC-5 50 125 160 4-φ18
21/2GC-6 65 145 180 8-φ18

How to Select a Pump Model

• Calculate the required head and flow rate based on boiler feed system design.

• Determine the appropriate motor power based on system operating conditions.

• Verify installation space and confirm that the horizontal configuration fits.

• Select the appropriate materials for wetted parts based on fluid characteristics.

✔ Final pump selection should be based on calculated duty point, system pressure, and site-specific conditions.

Engineering Notes

• Ensure the pump operates at or near the rated duty point for optimal performance.

• NPSH must be calculated to prevent cavitation, particularly in high-temperature applications.

• Adequate foundation and support must be provided for proper pump alignment.

• Pipeline alignment should be checked regularly to avoid excessive stress on the pump casing.

Compliance & Quality Assurance

• Factory performance testing including hydraulic, pressure, and vibration tests

• Full-material traceability for critical wetted parts

• Pump performance verification for various duty points

• Optional third-party inspection as per customer requirements

Safety Notice 

• Always ensure the pump is properly primed before operation.

• Do not operate the pump without adequate suction pressure.

• Ensure the pump is not subject to dry-running conditions.

• Disconnect power before performing any maintenance or service work.

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 pump operate under VFD control?
Yes, VFD integration is possible for precise flow and pressure regulation.

Q2: What is the maximum allowable working pressure?
The maximum allowable working pressure is ≤ 2.5 MPa.

Q3: How do I calculate the NPSH required for the pump?
NPSH can be determined based on the system’s flow rate and total dynamic head; refer to the performance curve.

Q4: Is the pump suitable for wastewater applications?
No, this pump is designed for clean water. Special configurations are required for wastewater.

Q5: How often should the mechanical seals be replaced?
Mechanical seals should be inspected regularly and replaced every 2–3 years, depending on operating conditions.

Q6: What maintenance is required for this pump?
Regular inspection of seals, bearings, and impellers is necessary to ensure efficient operation.