LG-B Fvertical multistage centrifugal pump for high-rise facility dismantle – Updated

LG-B Fvertical multistage centrifugal pump for high-rise facility dismantle – Updated

Product Overview LG-B Facility Dismantle Vertical Multistage Centrifugal Pump is a vertical multistage centrifugal pump ...

View details Contact us

Product Overview

LG-B Facility Dismantle Vertical Multistage Centrifugal Pump is a vertical multistage centrifugal pump with back-pull-out dismantling structure designed for high-rise water supply and pressure boosting applications.

It solves maintenance difficulty in confined pump rooms by allowing mechanical seal and rotating assembly removal without dismantling pipeline connections.

It is applied in high-rise building water supply, HVAC circulation systems, industrial process boosting, and municipal pressure regulation stations.

✔ For building service water systems requiring high-head boosting with convenient on-site mechanical maintenance

Model Designation

LG-B Fvertical multistage centrifugal pump for high-rise facility dismantle

Applications

Typical Operating Scenarios

• High-rise domestic water boosting with vertical pipeline layout

• HVAC chilled and hot water circulation in equipment rooms with limited space

• Industrial clean water transfer requiring stable high head output

• Municipal pressure stabilization stations with inline vertical installation

• Replacement projects requiring minimal piping modification

Engineering Advantages

Structural Design Logic & Engineering Outcome

• Back pull-out dismantling structure enables seal and rotor maintenance without disturbing inlet/outlet pipelines.

• Vertical multistage hydraulic design provides high head under compact footprint.

• Coaxial inlet and outlet reduce pipeline stress and simplify installation alignment.

• Cartridge mechanical seal configuration improves serviceability and operational stability.

✔ Detailed hydraulic performance curves and configuration data are provided in the technical parameter section below.

System Components

LG-B Facility Dismantle Vertical Multistage Centrifugal Pump ：

• Pump head assembly (stage casing and impellers)

• Back pull-out rotating assembly

• Mechanical seal cartridge

• Motor and coupling system

• Base and vertical support structure

Technical Specifications

Service Conditions

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

Not suitable for flammable, explosive, or corrosive media unless specially configured.

Operating Conditions

Flow Rate: 3 – 150 m³/h
Head: 20 – 200 m
Power Range: 0.75 – 132 kW
Speed: 2900 rpm
Liquid Temperature: ≤ 80°C (Standard) / ≤ 105°C (Hot Water Version)
Working Pressure: ≤ 2.5 MPa

Detailed parameter tables are provided below.

Installation & Dimensions

Outline Drawing

Structure Diagram

Performance Data

No. Name Material / Model No. Name Material / Model
1 Motor Y Series (V5), 2-Pole 9 Shaft Sleeve Q235
2 Motor Support HT200 10 Middle Section HT200
3 Coupling HT200 11 Guide Vane HT200
4 Mechanical Seal Gland HT200 12 Impeller HT200
5 Exhaust Valve Brass Alloy 13 Shaft 45 / 2Cr13
6 Mechanical Seal 120A 14 Bearing Tin Bronze
7 Final Guide Vane HT200 15 Inlet Section HT200
8 Discharge Section HT200

Performance Parameters

Model Stages Flow Rate Head Speed Motor Power Efficiency Weight NPSHr
(m3/h) (M) (r/min) (kw) (%） Kg （NPSH）r(m)
25LG(R)3-10*2 2 3 20 2900 0.75 42 70 2.0
25LG(R)3-10*3 3 3 30 2900 1.1 42 74 2.0
25LG(R)3-10*4 4 3 40 2900 1.5 42 85 2.0
25LG(R)3-10*5 5 3 50 2900 1.5 42 89 2.0
25LG(R)3-10*6 6 3 60 2900 2.2 42 100 2.0
25LG(R)3-10*7 7 3 70 2900 2.2 42 104 2.0
25LG(R)3-10*8 8 3 80 2900 2.2 42 108 2.0
25LG(R)3-10*9 9 3 90 2900 2.2 42 112 2.0
25LG(R)3-10*10 10 3 100 2900 3 42 125 2.0
25LG(R)3-10*11 11 3 110 2900 3 42 129 2.0
25LG(R)3-10*12 12 3 120 2900 4 42 145 2.0
25LG(R)3-10*13 13 3 130 2900 4 42 149 2.0
25LG(R)3-10*14 14 3 140 2900 4 42 153 2.0
25LG(R)3-10*15 15 3 150 2900 4 42 157 2.0
Model Stages Flow Rate Head Speed Motor Power Efficiency Weight NPSHr
(m3/h) (M) (r/min) (kw) (%） Kg （NPSH）r(m)
32LG(R)6.5-15*2 2 6.5 30 2900 1.5 53 90 2.4
32LG(R)6.5-15*3 3 6.5 45 2900 2.2 53 100 2.4
32LG(R)6.5-15*4 4 6.5 60 2900 3 53 115 2.4
32LG(R)6.5-15*5 5 6.5 75 2900 4 53 135 2.4
32LG(R)6.5-15*6 6 6.5 90 2900 4 53 142 2.4
32LG(R)6.5-15*7 7 6.5 105 2900 5.5 53 175 2.4
32LG(R)6.5-15*8 8 6.5 120 2900 5.5 53 182 2.4
32LG(R)6.5-15*9 9 6.5 135 2900 5.5 53 190 2.4
32LG(R)6.5-15*10 10 6.5 150 2900 7.5 53 210 2.4
40LG(R)12-15*2 2 12 30 2900 2.2 60 90 2.9
40LG(R)12-15*3 3 12 45 2900 3 60 105 2.9
40LG(R)12-15*4 4 12 60 2900 4 60 130 2.9
40LG(R)12-15*5 5 12 75 2900 5.5 60 155 2.9
40LG(R)12-15*6 6 12 90 2900 5.5 60 163 2.9
40LG(R)12-15*7 7 12 105 2900 7.5 60 180 2.9
40LG(R)12-15*8 8 12 120 2900 7.5 60 190 2.9
40LG(R)12-15*9 9 12 135 2900 11 60 215 2.9
40LG(R)12-15*10 10 12 150 2900 11 60 225 2.9
Model Stages Flow Rate Head Speed Motor Power Efficiency Weight NPSHr
(m3/h) (M) (r/min) (kw) (%） Kg （NPSH）r(m)
50LG(R)24-20*2 2 24 40 2900 5.5 69 160 3.2
50LG(R)24-20*3 3 24 60 2900 7.5 69 180 3.2
50LG(R)24-20*4 4 24 80 2900 11 69 250 3.2
50LG(R)24-20*5 5 24 100 2900 11 69 260 3.2
50LG(R)24-20*6 6 24 120 2900 15 69 280 3.2
50LG(R)24-20*7 7 24 140 2900 15 69 290 3.2
50LG(R)24-20*8 8 24 160 2900 18.5 69 315 3.2
65LG(R)36-20*2 2 36 40 2900 7.5 72 170 3.4
65LG(R)36-20*3 3 36 60 2900 11 72 230 3.4
65LG(R)36-20*4 4 36 80 2900 15 72 250 3.4
65LG(R)36-20*5 5 36 100 2900 18.5 72 280 3.4
65LG(R)36-20*6 6 36 120 2900 22 72 330 3.4
65LG(R)36-20*7 7 36 140 2900 22 72 345 3.4
65LG(R)36-20*8 8 36 160 2900 30 72 395 3.4
Model Stages Flow Rate Head Speed Motor Power Efficiency Weight NPSHr
(m3/h) (M) (r/min) (kw) (%） Kg （NPSH）r(m)
80LG(R)50-20*2 2 50 40 2900 11 73 250 3.4
80LG(R)50-20*3 3 50 60 2900 15 73 280 3.4
80LG(R)50-20*4 4 50 80 2900 18.5 73 310 3.4
80LG(R)50-20*5 5 50 100 2900 22 73 360 3.4
80LG(R)50-20*6 6 50 120 2900 30 73 440 3.4
80LG(R)50-20*7 7 50 140 2900 30 73 460
80LG(R)50-20*8 8 50 160 2900 37 73 490
100LG72-20*2 2 72 40 2900 11 73 260 3.5
100LG72-20*3 3 72 60 2900 18.5 73 290 3.5
100LG72-20*4 4 72 80 2900 22.0 73 380 3.5
100LG72-20*5 5 72 100 2900 30.0 73 450 3.5
100LG72-20*6 6 72 120 2900 37.0 73 470 3.5
100LG72-20*7 7 72 140 2900 45.0 73 520 3.5
100LG72-20*8 8 72 160 2900 45.0 73 540 3.5
100LG72-20*9 9 72 180 2900 55.0 73 3.5
Model Stages Flow Rate Head Speed Motor Power Efficiency Weight NPSHr
(m3/h) (M) (r/min) (kw) (%） Kg （NPSH）r(m)
100LG100-20*2 2 100 40 2900 18.5 76 3.7
100LG100-20*3 3 100 60 2900 30 76 3.7
100LG100-20*4 4 100 80 2900 37 76 3.7
100LG100-20*5 5 100 100 2900 45 76 3.7
100LG100-20*6 6 100 120 2900 55 76 3.7
100LG100-20*7 7 100 140 2900 75 76 3.7
100LG100-20*8 8 100 160 2900 75 76 3.7
150LG150-20*2 2 150 40 2900 30 77 4.1
150LG150-20*3 3 150 60 2900 37 77 4.1
150LG150-20*4 4 150 80 2900 45 77 4.1
150LG150-20*5 5 150 100 2900 55 77 4.1
150LG150-20*6 6 150 120 2900 75 77 4.1
150LG150-20*7 7 150 140 2900 90 77 4.1
150LG150-20*8 8 150 160 2900 90 77 4.1
150LG150-20*9 9 150 180 2900 110 77 4.1
150LG150-20*10 10 150 200 2900 132 77 4.1

Installation Diagram

LG-B Fvertical multistage centrifugal pump for high-rise facility dismantle

Performance Parameters（2）

Model

 Stages L H H1 H2 B b n-φd Inlet Flange Outlet Flange
Dj Djn Dj2 n-dj Dc Dcn Dc2 n-φdc
25LG(R)3-10 2 130 630 85 180 230 190 4-φ18 115 25 85 4-M12 115 25 85 4-φ14
25LG(R)3-10 3 130 670 85 220 230 190 4-φ18 115 25 85 4-M12 115 25 85 4-φ14
25LG(R)3-10 4 130 710 85 260 230 190 4-φ18 115 25 85 4-M12 115 25 85 4-φ14
25LG(R)3-10 5 130 755 85 305 230 190 4-φ18 115 25 85 4-M12 115 25 85 4-φ14
25LG(R)3-10 6 130 825 85 340 230 190 4-φ18 115 25 85 4-M12 115 25 85 4-φ14
25LG(R)3-10 7 130 865 85 380 230 190 4-φ18 115 25 85 4-M12 115 25 85 4-φ14
25LG(R)3-10 8 130 900 85 425 230 190 4-φ18 115 25 85 4-M12 115 25 85 4-φ14
25LG(R)3-10 9 130 945 85 460 230 190 4-φ18 115 25 85 4-M12 115 25 85 4-φ14
25LG(R)3-10 10 130 1020 85 500 230 190 4-φ18 115 25 85 4-M12 115 25 85 4-φ14
25LG(R)3-10 11 130 1060 85 540 230 190 4-φ18 115 25 85 4-M12 115 25 85 4-φ14
25LG(R)3-10 12 130 1120 85 580 230 190 4-φ18 115 25 85 4-M12 115 25 85 4-φ14
25LG(R)3-10 13 130 1160 85 620 230 190 4-φ18 115 25 85 4-M12 115 25 85 4-φ14
25LG(R)3-10 14 130 1200 85 660 230 190 4-φ18 115 25 85 4-M12 115 25 85 4-φ14
25LG(R)3-10 15 130 1240 85 700 230 190 4-φ18 115 25 85 4-M12 115 25 85 4-φ14

Model

 Stages L H H1 H2 B b n-φd Inlet Flange Outlet Flange
Dj Djn Dj2 n-dj Dc Dcn Dc2 n-φdc
32LG(R)6.5-15 2 145 665 63 179 260 220 4-φ18 140 32 100 4-M16 140 32 100 4-φ18
32LG(R)6.5-15 3 145 740 63 229 260 220 4-φ18 140 32 100 4-M16 140 32 100 4-φ18
32LG(R)6.5-15 4 145 825 63 279 260 220 4-φ18 140 32 100 4-M16 140 32 100 4-φ18
32LG(R)6.5-15 5 145 895 63 329 260 220 4-φ18 140 32 100 4-M16 140 32 100 4-φ18
32LG(R)6.5-15 6 145 945 63 379 260 220 4-φ18 140 32 100 4-M16 140 32 100 4-φ18
32LG(R)6.5-15 7 145 1070 63 429 260 220 4-φ18 140 32 100 4-M16 140 32 100 4-φ18
32LG(R)6.5-15 8 145 1120 63 479 260 220 4-φ18 140 32 100 4-M16 140 32 100 4-φ18
32LG(R)6.5-15 9 145 1170 63 529 260 220 4-φ18 140 32 100 4-M16 140 32 100 4-φ18
32LG(R)6.5-15 10 145 1220 63 579 260 220 4-φ18 140 32 100 4-M16 140 32 100 4-φ18
40LG(R)12-15 2 145 710 70 193 260 220 4-φ18 150 40 110 4-M16 150 40 110 4-φ18
40LG(R)12-15 3 145 800 70 251 260 220 4-φ18 150 40 110 4-M16 150 40 110 4-φ18
40LG(R)12-15 4 145 880 70 309 260 220 4-φ18 150 40 110 4-M16 150 40 110 4-φ18
40LG(R)12-15 5 145 1015 70 367 260 220 4-φ18 150 40 110 4-M16 150 40 110 4-φ18
40LG(R)12-15 6 145 1075 70 425 260 220 4-φ18 150 40 110 4-M16 150 40 110 4-φ18
40LG(R)12-15 7 145 1170 70 483 260 220 4-φ18 150 40 110 4-M16 150 40 110 4-φ18
40LG(R)12-15 8 145 1230 70 541 260 220 4-φ18 150 40 110 4-M16 150 40 110 4-φ18
40LG(R)12-15 9 145 1410 70 599 260 220 4-φ18 150 40 110 4-M16 150 40 110 4-φ18
40LG(R)12-15 10 145 1465 70 657 260 220 4-φ18 150 40 110 4-M16 150 40 110 4-φ18

Model

 Stages L H H1 H2 B b n-φd Inlet Flange Outlet Flange
Dj Djn Dj2 n-dj Dc Dcn Dc2 n-φdc
50LG(R)24-20 2 180 885 80 214 300 248 4-φ23 165 50 125 4-M16 165 50 125 4-φ18
50LG(R)24-20 3 180 985 80 273 300 248 4-φ23 165 50 125 4-M16 165 50 125 4-φ18
50LG(R)24-20 4 180 1145 80 332 300 248 4-φ23 165 50 125 4-M16 165 50 125 4-φ18
50LG(R)24-20 5 180 1210 80 391 300 248 4-φ23 165 50 125 4-M16 165 50 125 4-φ18
50LG(R)24-20 6 180 1275 80 450 300 248 4-φ23 165 50 125 4-M16 165 50 125 4-φ18
50LG(R)24-20 7 180 1340 80 509 300 248 4-φ23 165 50 125 4-M16 165 50 125 4-φ18
50LG(R)24-20 8 180 1450 80 568 300 248 4-φ23 165 50 125 4-M16 165 50 125 4-φ18
65LG(R)36-20 2 180 965 90 245 300 248 4-φ23 185 65 145 4-M16 185 65 145 4-φ18
65LG(R)36-20 3 180 1120 90 304 300 248 4-φ23 185 65 145 4-M16 185 65 145 4-φ18
65LG(R)36-20 4 180 1185 90 363 300 248 4-φ23 185 65 145 4-M16 185 65 145 4-φ18
65LG(R)36-20 5 180 1295 90 422 300 248 4-φ23 185 65 145 4-M16 185 65 145 4-φ18
65LG(R)36-20 6 180 1390 90 481 300 248 4-φ23 185 65 145 4-M16 185 65 145 4-φ18
65LG(R)36-20 7 180 1455 90 540 300 248 4-φ23 185 65 145 4-M16 185 65 145 4-φ18
65LG(R)36-20 8 180 1615 90 599 300 248 4-φ23 185 65 145 4-M16 185 65 145 4-φ18

Model

 Stages L H H1 H2 B b n-φd Inlet Flange Outlet Flange
Dj Djn Dj2 n-dj Dc Dcn Dc2 n-φdc
80LG(R)50-20 2 187 965 112 301 315 272 4-φ23 200 80 160 8-M16 200 80 160 8-φ18
80LG(R)50-20 3 187 1195 112 379 315 272 4-φ23 200 80 160 8-M16 200 80 160 8-φ18
80LG(R)50-20 4 187 1270 112 457 315 272 4-φ23 200 80 160 8-M16 200 80 160 8-φ18
80LG(R)50-20 5 187 1395 112 535 315 272 4-φ23 200 80 160 8-M16 200 80 160 8-φ18
80LG(R)50-20 6 187 1505 112 613 315 272 4-φ23 200 80 160 8-M16 200 80 160 8-φ18
80LG(R)50-20 7 187 1675 112 691 315 272 4-φ23 200 80 160 8-M16 200 80 160 8-φ18
80LG(R)50-20 8 187 1755 112 769 315 272 4-φ23 200 80 160 8-M16 200 80 160 8-φ18
100LG72-20 2 187 1185 122 343 315 272 4-φ23 220 100 180 8-M16 220 100 180 8-φ18
100LG72-20 3 187 1270 122 432 315 272 4-φ23 220 100 180 8-M16 220 100 180 8-φ18
100LG72-20 4 187 1390 122 521 315 272 4-φ23 220 100 180 8-M16 220 100 180 8-φ18
100LG72-20 5 187 1580 122 610 315 272 4-φ23 220 100 180 8-M16 220 100 180 8-φ18
100LG72-20 6 187 1655 122 699 315 272 4-φ23 220 100 180 8-M16 220 100 180 8-φ18
100LG72-20 7 187 1800 122 788 315 272 4-φ23 220 100 180 8-M16 220 100 180 8-φ18
100LG72-20 8 187 1900 122 877 315 272 4-φ23 220 100 180 8-M16 220 100 180 8-φ18
100LG72-20 9 187 2100 122 966 315 272 4-φ23 220 100 180 8-M16 220 100 180 8-φ18

Installation Diagram（2）

Rigid Connection
LG-B Fvertical multistage centrifugal pump for high-rise facility dismantle
1 Ball Valve 2 Flexible Joint 3 Pressure Gauge 4 Vacuum Pressure Gauge
5 Gate Valve 6 Elbow Pipe 7 Pressure Measuring Pipe 8 Concrete Base
Flexible Connection
LG-B Fvertical multistage centrifugal pump for high-rise facility dismantle
1 Ball Valve 2 Flexible Joint 3 Pressure Measuring Pipe 4 Gate Valve 5 Elbow Pipe
6 Pump 7 Connection Plate 8 JGD Vibration Isolator 9 Concrete Base

Installation Diagram（3）

Connection Plate Dimensions
LG-B Fvertical multistage centrifugal pump for high-rise facility dismantle
Rigid Connection Concrete Base Foundation Drawing
LG-B Fvertical multistage centrifugal pump for high-rise facility dismantle

Performance Data（2）

Model Connection Plate Dimensions Rigid Connection Concrete Base Dimensions
A×A B×B C×C H d1 d2 D×D E×E F×F H d h
25LG 190 340 400 60 φ14 or φ18 φ18 191 500 550 250 60 200
32LG 220 440 500 60 φ14 or φ18 φ18 219 500 550 250 60 200
40LG 220 440 500 60 φ14 or φ18 φ24 219 500 550 250 80 250
50LG 248 540 600 60 φ18 or φ22 φ24 248 550 600 350 80 250
65LG 248 540 600 60 φ18 or φ22 φ24 248 550 600 350 80 250
80LG 272 540 600 60 φ18 or φ22 φ24 272 600 650 350 80 250
100LG 272 540 600 60 φ22 φ24 272 600 650 350 80 250

How to Select a Pump Model

• Determine required duty point (flow rate and total dynamic head) based on system hydraulic calculation.

• Verify installation space to confirm vertical structure compatibility.

• Evaluate maintenance accessibility requirements to confirm need for dismantle structure.

• Confirm allowable system pressure to select appropriate stage number.

✔ Final pump selection must be verified according to calculated duty point and site installation conditions.

Engineering Notes

• Pump should operate near rated duty point to ensure hydraulic efficiency.

• Adequate NPSH must be ensured to prevent cavitation in high-temperature systems.

• Foundation rigidity must support vertical load and motor weight.

• Pipeline stress should not be transferred to pump casing.

Compliance & Quality Assurance

• Factory hydraulic performance test before shipment

• Dynamic balance test for rotating assembly

• Pressure casing hydrostatic test

• Mechanical seal inspection and leakage verification

• Material certification traceability for wetted components

Safety Notice 

• Do not operate under dry-running condition.

• Ensure suction priming before startup.

• Disconnect power before mechanical dismantling.

• Do not exceed rated working 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 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, frequency control is compatible for variable flow regulation.

Q2: What is the allowable maximum working pressure?
Maximum allowable working pressure is ≤ 2.5 MPa depending on configuration.

Q3: What is the maximum liquid temperature?
Standard configuration supports ≤ 120°C.

Q4: Is the mechanical seal replaceable without removing piping?
Yes, the back pull-out structure allows maintenance without pipeline dismantling.

Q5: What is the required NPSH margin?
NPSH requirement depends on model size and operating flow; refer to performance curve.

Q6: What installation orientation is required?
The pump must be installed vertically with aligned coaxial pipeline connection.