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ISG Vertical Pipeline Centrifugal Pump
Complete Technical Specifications & Performance Data
📊 Technical Overview
The ISG series vertical pipeline centrifugal pump features inline inlet/outlet design for space-saving installation in water supply, HVAC, and industrial systems.
1. General Specifications
| Parameter |
Specification |
| Pump Type |
Vertical single-stage single-suction centrifugal |
| Design Standard |
ISO 2858, GB/T 5656 |
| Rotation Direction |
Clockwise (viewed from motor end) |
| Mounting |
Vertical inline |
| Coupling |
Direct coupled |
| Seal Type |
Mechanical seal (Graphite/SiC) |
2. Performance Range
2.1 Operating Envelope
| Parameter |
Range |
Unit |
| Flow Rate |
1.5 – 1600 |
m³/h |
| Head |
5 – 150 |
m |
| Speed |
1450 / 2900 |
r/min |
| Power |
0.37 – 250 |
kW |
| Efficiency |
Up to 85 |
% |
| NPSHr |
2.0 – 5.0 |
m |
2.2 Performance Curve Characteristics
Head-Flow Curve:
- Stable curve with continuous head decrease
- No dip or instability in operating range
- Shut-off head: 110-130% of BEP head
Efficiency Curve:
- Peak efficiency at Best Efficiency Point (BEP)
- High efficiency zone: 70-120% of BEP flow
- Preferred Operating Region (POR): 70-120% BEP
3. Model Designation System
3.1 Naming Convention
Example: ISG 80-160
- ISG = Vertical pipeline pump
- 80 = Inlet diameter (mm)
- 160 = Impeller nominal diameter (mm)
3.2 Variant Codes
| Code |
Meaning |
Application |
| ISG |
Standard |
Clean water ≤80°C |
| IRG |
Hot water |
Hot water ≤120°C |
| IHG |
Chemical |
Corrosive liquids ≤120°C |
| GRG |
High temp |
High temp ≤240°C |
| YG |
Oil |
Oil products ≤120°C |
4. Detailed Model Specifications
4.1 Small Flow Models (ISG25-ISG40)
| Model |
Flow |
Head |
Power |
Speed |
Eff. |
NPSHr |
Weight |
| ISG25-125A |
3.2 m³/h |
16 m |
0.75 kW |
2900 |
54% |
2.0 m |
25 kg |
| ISG25-160 |
3.2 m³/h |
28 m |
1.1 kW |
2900 |
52% |
2.0 m |
28 kg |
| ISG32-125 |
5 m³/h |
20 m |
0.75 kW |
2900 |
58% |
2.0 m |
27 kg |
| ISG40-125 |
6.3 m³/h |
20 m |
1.1 kW |
2900 |
60% |
2.0 m |
30 kg |
4.2 Medium Flow Models (ISG50-ISG80)
| Model |
Flow |
Head |
Power |
Speed |
Eff. |
NPSHr |
Weight |
| ISG50-125 |
12.5 m³/h |
20 m |
1.5 kW |
2900 |
63% |
2.5 m |
35 kg |
| ISG50-160 |
12.5 m³/h |
32 m |
2.2 kW |
2900 |
62% |
2.5 m |
40 kg |
| ISG50-200 |
12.5 m³/h |
50 m |
3.0 kW |
2900 |
66% |
2.8 m |
45 kg |
| ISG65-125 |
25 m³/h |
20 m |
2.2 kW |
2900 |
67% |
2.5 m |
42 kg |
| ISG65-160 |
25 m³/h |
32 m |
4.0 kW |
2900 |
68% |
2.8 m |
48 kg |
| ISG80-125 |
50 m³/h |
20 m |
4.0 kW |
2900 |
70% |
2.8 m |
55 kg |
| ISG80-160 |
50 m³/h |
32 m |
7.5 kW |
2900 |
70% |
3.0 m |
65 kg |
4.3 Large Flow Models (ISG100-ISG150)
| Model |
Flow |
Head |
Power |
Speed |
Eff. |
Weight |
| ISG100-125 |
100 m³/h |
20 m |
7.5 kW |
2900 |
72% |
85 kg |
| ISG100-160 |
100 m³/h |
32 m |
15 kW |
2900 |
74% |
100 kg |
| ISG100-200 |
100 m³/h |
50 m |
18.5 kW |
2900 |
72% |
120 kg |
| ISG125-125 |
160 m³/h |
20 m |
11 kW |
2900 |
75% |
110 kg |
| ISG125-160 |
160 m³/h |
32 m |
22 kW |
2900 |
76% |
135 kg |
| ISG150-200 |
200 m³/h |
50 m |
45 kW |
1450 |
78% |
250 kg |
5. Construction Materials
5.1 Standard Configuration (ISG)
| Component |
Material |
Standard |
| Pump Casing |
Cast Iron |
HT200 / GG25 |
| Impeller |
Cast Iron |
HT200 |
| Shaft |
Carbon Steel |
45# / AISI 1045 |
| Wear Rings |
Brass |
HPb59-1 |
| Mechanical Seal |
Graphite/SiC |
Standard |
| Bearings |
Deep groove ball |
SKF/NSK |
5.2 Optional Materials
| Application |
Material Upgrade |
| Corrosive |
Stainless Steel 304/316 |
| Food Grade |
Stainless Steel 316L |
| High Wear |
Ductile Iron / Bronze |
| Sea Water |
Duplex Stainless Steel |
6. Operating Limits
6.1 Temperature
| Model |
Min Temp |
Max Temp |
Unit |
| ISG (Standard) |
-10 |
+80 |
°C |
| IRG (Hot Water) |
-10 |
+120 |
°C |
| IHG (Chemical) |
-20 |
+120 |
°C |
| GRG (High Temp) |
-20 |
+240 |
°C |
6.2 Pressure
| Parameter |
Value |
Unit |
| Max Working Pressure |
1.6 |
MPa (16 bar) |
| Max Suction Pressure |
0.6 |
MPa (6 bar) |
| Hydrostatic Test Pressure |
2.4 |
MPa (24 bar) |
6.3 Liquid Properties
- pH Range: 6-9 (standard), 2-13 (stainless steel)
- Viscosity: ≤ 5 cSt (standard)
- Solids: Clean liquid only (no solids)
- Density: ≤ 1200 kg/m³
7. Electrical Specifications
7.1 Motor Data
| Parameter |
Specification |
| Voltage |
380V ±10%, 50Hz, 3-phase |
| Alternative |
220V, 415V, 460V (optional) |
| Insulation Class |
F (155°C) |
| Protection Class |
IP55 |
| Duty |
S1 (Continuous) |
| Efficiency Class |
IE2 / IE3 (optional) |
7.2 Starting Method
- Direct-on-line (DOL) – Standard
- Star-Delta – For motors >7.5kW
- Soft Starter – Optional
- VFD (Variable Frequency Drive) – Optional
8. Dimensions & Weights
8.1 Connection Flanges
| Size |
DN |
PN |
Standard |
| Small |
25-50 |
16 |
GB/T 9119 / EN 1092 |
| Medium |
65-100 |
16 |
GB/T 9119 / EN 1092 |
| Large |
125-150 |
16 |
GB/T 9119 / EN 1092 |
9. Performance Optimization
9.1 Best Efficiency Point (BEP)
For optimal performance and longest life:
- Operate within 70-120% of BEP flow
- Avoid continuous operation below 50% BEP
- Avoid continuous operation above 130% BEP
9.2 Affinity Laws
10. Selection Guidelines
10.1 Selection Steps
- Determine required flow rate (m³/h)
- Calculate total head (static + friction)
- Check NPSHa > NPSHr + 0.5m margin
- Select model from performance curves
- Verify motor power adequacy
- Confirm material compatibility
11. Contact Support
Shanghai Chaodun Machinery Manufacturing Group Co., Ltd.
Website: https://cd-pump.com
