What Pump Should You Use for Chemical Pipelines, HVAC Circulation and Mine Drainage? A Complete Guide to IHG Vertical Inline Centrifugal Pumps
View product specifications & request a quote
The IHG vertical inline centrifugal pump is a new generation of vertical pipeline chemical centrifugal pump designed and manufactured based on the performance parameters of IS-type centrifugal pumps, using advanced hydraulic models, and according to the international standard ISO2858. It has a flow range of 1–1500 m³/h, a head range of 7–150 m, motor power of 0.18–2500 kW, efficiency of 19%–84%, pump weight of 17–2200 kg, and a NPSH of 2.0–6.0 m. The main structural features are a vertical structure with identical inlet and outlet diameters located on the same centerline, which can be installed in pipelines like a valve. It has a compact and attractive appearance, occupies a small footprint, and requires low construction investment. With a protective cover, it can be used outdoors; the impeller is mounted directly on the motor’s extended shaft, resulting in a short axial length and compact structure. The pump and motor bearing arrangement is reasonable, effectively balancing radial and axial loads generated during operation to ensure smooth performance and low vibration and noise. The shaft seal uses a mechanical seal or a combination mechanical seal, with imported titanium alloy seal rings, medium high-temperature mechanical seals, and carbide materials that are wear-resistant, effectively extending the service life of the mechanical seal. Installation and maintenance are convenient, requiring no disassembly of the pipeline system; simply remove the pump coupling seat nut to extract all rotor components. Depending on usage requirements, the pump can operate in series or parallel, and installation can be vertical or horizontal according to pipeline layout. Based on usage temperature and medium, the IHG series has derived IRG, IHG, YG, and other series suitable for hot water, corrosive media, and petrochemical products. For motors over 30 kW, two designs are available: direct-coupled and easy-disassembly. The easy-disassembly type allows the pump rotor to be removed without moving the motor or pump body, greatly reducing maintenance costs and labor intensity. The IHG series is generally used in non-explosive environments. For use in coal mine underground or chemical explosive gas environments, an explosion-proof motor should be selected, or the IHGB explosion-proof model should be used. Why choose the IHG vertical inline centrifugal pump? First, pipeline installation saves space, and the coaxial design of the inlet and outlet allows it to be directly connected in the pipeline without additional foundations, occupying a small footprint and requiring low construction investment. Second, high efficiency and energy saving, using advanced hydraulic models and IS-type centrifugal pump performance parameters, with a maximum efficiency of up to 84%. Third, strong corrosion resistance: the flow-through components are made of stainless steel, capable of transporting weakly and moderately corrosive liquids, with a medium temperature range of -20℃ to 120℃; Fourth, easy maintenance: the removable structure allows the rotor components to be pulled out without disassembling the piping; Fifth, wide applicability: suitable for various industries including chemical, petroleum, metallurgy, power, paper, food, pharmaceuticals, HVAC, and mine drainage. The IHG series is mainly used in: chemical and petroleum process pumps, raw material transportation, medium circulation, and pipeline boosting, with operating temperatures from -20℃ to 120℃; HVAC cooling and heating water circulation boosting, boiler high-temperature hot water boosting and circulation, with operating temperatures below 80℃ or 120℃; industrial and municipal water supply and drainage, high-rise building water boosting, garden irrigation, fire-fighting boosting, and long-distance transportation; liquid transportation in metallurgy, power, paper, food, pharmaceutical, and synthetic fiber sectors; mine and pit drainage and ore processing. The target users of the IHG series include: procurement and engineering personnel from chemical, petroleum, and pharmaceutical plants, HVAC system integrators, water treatment and supply system integrators, mining enterprise equipment procurement teams, OEM equipment manufacturers (for pump sets), industrial pump distributors and stockists, and overseas EPC contractors. When should you choose or replace an IHG pump? When chemical pipelines need to transport corrosive liquids and require corrosion-resistant pumps; when HVAC systems need circulation and boosting pumps and space is limited, requiring inline installation; when high-rise buildings need water boosting with minimum footprint; when mines require pit water drainage pumps with suitable flow and head; when old pumps have low efficiency and high energy consumption and need energy-saving upgrades; when pipeline modifications require directly adding a pump to the existing pipeline; when export projects require ISO2858 standard pumps. How to select an IHG inline centrifugal pump? First, determine the flow and head according to the piping system by calculating the required flow and total head (static head + pipe loss + outlet pressure); second, choose the pump model based on flow and head by matching the performance curve or model table. For example, in the model IHG50-160, 50 refers to the inlet/outlet diameter in mm, and 160 refers to the nominal impeller outer diameter in mm. Step 3: Confirm the medium characteristics. For corrosive media, choose stainless steel wet parts (304/316/316L); for clean water, cast iron is sufficient. Step 4: Confirm the medium temperature. Below 80℃, select the standard type; below 120℃, select the hot water type; below 240℃, select the high-temperature type. Step 5: Confirm the working pressure. Suction pressure ≤1.0MPa or pump system maximum working pressure ≤1.6MPa. Above this, special ordering is required. Step 6: Choose the installation method. Vertical or horizontal installation, B3/B5 motor mounting. Step 7: Confirm the motor configuration. Power range 0.18–2500kW, voltage 380V/50Hz standard, customizable. Step 8: If using a frequency converter, confirm frequency conversion compatibility.
Model example: `IHG50-160(I)A`. This denotes IHG pipeline chemical pump type, 50 is the pump inlet and outlet diameter in mm, 160 is the nominal impeller diameter in mm, I is the flow classification, and A indicates the first cut of the impeller.
IHG series main models and parameter table (2-pole motor, 50Hz, example)
| Model | Flow m³/h | Head m | Motor power kW | Speed r/min | Efficiency % | Net positive suction head m |
|---|---|---|---|---|---|---|
| IHG20-110 | 2.5 | 15 | 0.37 | 2900 | 36 | 2.0 |
| IHG25-125 | 3.0 | 20 | 1.5 | 2950 | 36 | 2.0 |
| IHG32-125 | 6.3 | 20 | 1.5 | 2900 | 44 | 2.0 |
| IHG40-125 | 12.5 | 20 | 2.2 | 2900 | 54 | 2.3 |
| IHG50-160 | 25 | 32 | 5.5 | 2900 | 62 | 2.5 |
| IHG65-160 | 50 | 32 | 7.5 | 2900 | 70 | 3.0 |
| IHG80-160 | 100 | 32 | 15 | 2900 | 76 | 3.5 |
| IHG100-160 | 160 | 32 | 22 | 2900 | 80 | 4.0 |
| IHG125-200 | 200 | 50 | 45 | 2900 | 82 | 5.0 |
| IHG150-250 | 300 | 60 | 90 | 1450 | 76 | 6.0 |
| IHG200-500(I)B | 346 | 60 | 90 | 1450 | 76 | 6.0 |
General technical parameter table
| Parameter | Specification |
|---|---|
| Series | IHG |
| Type | Vertical single-stage single-suction pipeline centrifugal pump |
| Design standard | ISO2858，JB/T53058-93 |
| Flow range | 1–1500m³/h |
| Head range | 7–150m |
| Power range | 0.18–2500kW |
| Speed | 2900/1450 r/min |
| Efficiency range | 19%–84% |
| Pump weight | 17–2200kg |
| Net positive suction head | 2.0–6.0m |
| Inlet and outlet diameter | DN15–DN500 |
| Medium temperature | -20℃～120℃ (standard type); below 80℃ (clean water type); below 240℃ (high-temperature type) |
| Working pressure | Inlet pressure ≤ 1.0 MPa, system maximum working pressure ≤ 1.6 MPa, static pressure test ≤ 2.5 MPa |
| Ambient temperature | <40℃ |
| Relative humidity | <95% |
| Solid particles | Volume content ≤ 0.1%, particle size < 0.2 mm |
| Installation method | Vertical/horizontal, B3/B5 motor mounting |
Dimension drawing placeholder: `[Image: /images/ihg-pump-dimension-drawing.webp]`
Material table
| Component | Standard material | Optional material | Description |
|---|---|---|---|
| Pump body, impeller | Cast iron | 304/316/316L stainless steel | Select stainless steel for corrosive media |
| Pump shaft | 45# carbon steel | 2Cr13, stainless steel | Quenched and tempered |
| Mechanical seal | Hard alloy | Silicon carbide, titanium alloy seal ring, fluororubber | Wear-resistant seal to extend service life |
| Bearing | Rolling bearing | NSK/SKF | Sealed bearing or re-lubrication structure |
| Motor | Standard three-phase asynchronous motor | Explosion-proof motor (IHGB) | Compatible with B3/B5 installation |
| Flange | National standard flange | American/Japanese standard flange | Convenient connection |
| Coating | Industrial paint | Epoxy paint, anti-corrosion paint | Optional for corrosive environments |
Installation method
| Installation method | Description | Typical Applications |
|---|---|---|
| Vertical Installation | Vertical pipeline installation, coaxial vertical inlet and outlet | Chemical pipelines, HVAC systems |
| Horizontal Installation | Horizontal pipeline installation, coaxial horizontal inlet and outlet | Space-constrained scenarios |
| B3 Motor | Foot-mounted horizontal motor | Horizontal installation supporting |
| B5 Motor | Flange-mounted vertical motor | Vertical installation supporting |
Installation Inspection Points: The pump should be installed on a smooth and level foundation. Inlet and outlet pipelines should be connected without stress; confirm that system pressure does not exceed the allowable working pressure before installation; install a filter between the pump and suction pipeline, the gap should be only 0.3 mm, as particles can cause the pump to jam or seize; check that the pump shaft can rotate freely before startup by manually turning it for several rotations; ensure that the motor rotation direction matches the arrow direction on the pump body; the pump must be filled with medium before starting, and running the pump in cavitation conditions for a long time is prohibited; regularly check the motor current, which must not exceed the rated current.
Application Scenario Table
| Industry | Application | Recommended Configuration | Key Requirements |
|---|---|---|---|
| Chemical & Petroleum | Process pumps, raw material transport, medium circulation | IHG Stainless Steel type, 4-pole/2-pole | Corrosion resistance, mechanical seal |
| HVAC Refrigeration | Chilled/hot water circulation boost, boiler hot water circulation | IHG Standard type, 4-pole | Low noise, pipeline installation |
| Building Water Supply & Drainage | High-rise pressurization water supply, fire-fighting pressurization | IHG Standard type, 2-pole | High lift, small footprint |
| Mining | Mine water drainage, mineral processing flow | IHG standard type + wear-resistant seal | Wear-resistant, high flow |
| Electric power & metallurgy | Boiler feed water, cooling water circulation | IHG standard type / high-temperature type | High temperature resistant, continuous operation |
| Food & pharmaceuticals | Liquid transfer, CIP cleaning | IHG stainless steel type | Sanitary, easy to clean |
| Paper & textiles | Pulp transfer, process circulation | IHG stainless steel type | Corrosion-resistant, high flow |
Note: For explosive environments, please choose IHGB explosion-proof type or use with an explosion-proof motor.
## Technical FAQ
1. What is an IHG inline centrifugal pump?
IHG is a vertical, single-stage, single-suction inline centrifugal pump, using IS-type centrifugal pump performance parameters, designed and manufactured according to ISO2858 standards, with coaxial inlet and outlet, and can be installed in pipelines like a valve.
2. What are the flow and head ranges of IHG pumps?
Flow 1–1500 m³/h, head 7–150 m, power 0.18–2500 kW.
3. What is the efficiency of IHG pumps?
Efficiency range 19%–84%, varying by model and operating point.
4. What media are suitable for IHG pumps?
Can transport clean water and liquids with similar physical and chemical properties to clean water, weak to moderately corrosive liquids, medium temperature -20℃ to 120℃, solid particle content ≤0.1%, particle size <0.2 mm.
5. What materials are used for IHG pumps?
Standard wetted parts are cast iron, optional 304/316/316L stainless steel, mechanical seal uses carbide/silicon carbide/titanium alloy sealing ring/fluorine rubber.
6. What installation methods are supported by IHG pumps?
Vertical and horizontal installation, coaxial inlet and outlet, can be directly connected in the pipeline.
7. What is the working pressure of the IHG pump?
Suction pressure ≤1.0MPa, maximum system working pressure ≤1.6MPa, static pressure test ≤2.5MPa, special order required if exceeded.
8. Can the IHG pump use a frequency converter?
Yes, it is recommended to confirm frequency compatibility. Using a frequency converter can achieve energy-saving speed regulation.
9. What is the difference between IHG pumps and ISG pumps?
IHG is a chemical pipeline pump, flow-passing parts can be selected in stainless steel, with stronger corrosion resistance, suitable for corrosive media in chemical, petroleum, etc.; ISG is a general pipeline pump, mainly used for clean water transport.
10. Can the IHG pump be used in mines?
Yes, suitable for mine water drainage and mineral processing processes, a wear-resistant mechanical seal is recommended.
11. What is the convenient detachable structure of the IHG pump?
Models above 30kW can choose the detachable structure, allowing the rotor to be removed while the motor and pump body remain stationary, reducing maintenance costs and labor intensity.
12. What should be noted before starting the IHG pump?
Before starting, the pump must be filled with medium, check that the pump shaft can rotate freely, ensure the motor rotation direction is correct, and open the inlet and outlet valves.
13. What are the common faults of the IHG pump?
No water output (valve not open, pipeline blocked, wrong rotation direction), insufficient flow (impeller blocked, pipeline leakage), excessive power (bearing wear, medium density too high), abnormal noise and vibration (cavitation, poor alignment).
14. What is the maintenance cycle of the IHG pump?
The major overhaul period of the unit is generally one year; after long-term operation, mechanical wear requires replacement of vulnerable parts.
15. Can the IHG pump be customized?
Material (304/316/316L), voltage and frequency, installation method, explosion-proof configuration (IHGB), high-temperature type, frequency control, and other options can be customized.
16. Can the IHG pump be used in explosive environments?
Standard IHG is not applicable; you need to choose the IHGB explosion-proof type or equip it with an explosion-proof motor.
Keywords: Pump, Chemical, Pipelines, HVAC, Circulation, Mine, Drainage, IHG, Vertical, Inline, Centrifugal, Pumps