The ISG Series Vertical Single-Stage Single-Suction In-Line Centrifugal Pump is a highly efficient and reliable pumping solution designed for clean water and liquids with similar physical and chemical properties. Developed by combining advanced domestic hydraulic models with innovative design principles, this pump series delivers exceptional performance while maintaining low noise levels and outstanding operational reliability. Manufactured to international ISO 2858 standards, the ISG series has become the preferred choice for industrial water supply, HVAC circulation, building water boosting, fire protection systems, and numerous other applications.
Manufactured to international ISO 2858 standards and compliant with Chinese machinery standard JB/T53058-93, this pump series represents decades of engineering refinement in vertical inline centrifugal pump design.
Product Overview and Applications
The ISG vertical pipeline centrifugal pump series covers multiple variants to meet diverse industrial requirements:
- ISG Standard Model: For clean water and similar liquids – ideal for industrial and municipal water supply, high-rise building pressure boosting, garden irrigation, fire protection systems, long-distance fluid transfer, HVAC circulation, and bathroom hot/cold water circulation. Operating temperature below 80C.
- IRG Hot Water Model: Designed for metallurgy, chemical processing, textile manufacturing, wood processing, paper production, hotels, and residential heating circulation systems. Operating temperature up to 120C.
- IHG Chemical Pipeline Pump: Handles non-solid-particle corrosive liquids in petroleum, chemical, metallurgy, power generation, paper, food processing, pharmaceutical, and synthetic fiber industries. Operating temperature range: -20C to 120C.
- YG Pipeline Oil Pump: For transferring petroleum products including gasoline, kerosene, and diesel fuel. Operating temperature range: -20C to +120C.
- IHG B Stainless Steel Explosion-Proof Chemical Pump: Specifically engineered for flammable chemical liquid transfer in hazardous environments.
- Low-Speed Models (ISGD, IRGD, IHGD, YGD, IHGBD): Designed for applications requiring minimal environmental noise, such as air conditioning circulation systems.
Key Features and Advantages
- Compact Vertical Inline Design: The pump inlet and outlet share the same diameter and are aligned on the same centerline, allowing valve-like installation directly within the pipeline. This space-saving configuration reduces footprint and construction costs. With an optional protective cover, outdoor installation is also feasible.
- Direct-Coupled Impeller Design: The impeller mounts directly onto the motor extended shaft, resulting in a short axial dimension and compact overall structure. Optimized bearing configuration effectively balances radial and axial loads during operation, ensuring smooth running with minimal vibration and low noise.
- Premium Mechanical Sealing: Features imported titanium alloy seal rings, medium high-temperature mechanical seals, and tungsten carbide materials for superior wear resistance, significantly extending mechanical seal service life.
- Easy Maintenance Access: Rotor components can be extracted simply by removing the pump coupling seat nuts – no need to dismantle the entire pipeline system, greatly simplifying inspection and repair procedures.
- Flexible Operation Modes: Supports series and parallel operation configurations based on flow rate and head requirements.
- Versatile Installation Orientation: Can be installed in both vertical and horizontal configurations to match specific pipeline layout requirements.
Operating Conditions
- Suction pressure less than or equal to 1.0 MPa, or maximum system working pressure less than or equal to 1.6 MPa (suction inlet pressure + pump head less than or equal to 1.6 MPa). Static test pressure is 2.5 MPa. Please specify system working pressure when ordering. For systems exceeding 1.6 MPa, cast steel materials are used for flow passage and connection components.
- Ambient temperature below 40C, relative humidity below 95%.
- Solid particle content in conveyed medium must not exceed 0.1% by volume, with particle size below 0.2 mm. For media containing fine particles, please specify when ordering so wear-resistant mechanical seals can be provided.
Model Designation Guide
Understanding the ISG series model nomenclature:
- ISG: Single-Stage Single-Suction Vertical In-Line Centrifugal Pump
- IRG: Single-Stage Single-Suction Vertical In-Line Hot Water Centrifugal Pump
- IHG: Single-Stage Single-Suction Vertical Chemical Centrifugal Pump
- YG: Single-Stage Single-Suction Vertical In-Line Centrifugal Oil Pump
- IHG B: Single-Stage Single-Suction Vertical Stainless Steel Explosion-Proof Chemical Pump
- Suffix D: Low-Speed Type
- 50: Nominal Inlet and Outlet Diameter (mm)
- 160: Nominal Impeller Diameter (mm)
- I: Extended Flow Type
- A: Impeller First Trim
- B: Impeller Second Trim
Installation Guidelines
Proper installation is essential for reliable pump performance. Please follow these guidelines:
- Inspect all fasteners for tightness and check the pump flow passage for foreign object blockage before installation to prevent impeller and pump body damage during operation.
- Pipeline weight must NOT be supported by the pump body to avoid deformation.
- Anchor bolts must be securely tightened to prevent vibration from affecting pump performance during startup.
- Install control valves at both inlet and outlet pipelines, and mount a pressure gauge near the pump outlet to ensure operation within rated head and flow range, thereby extending pump service life.
- After installation, manually rotate the pump shaft to verify there is no friction noise or binding. If either condition is present, disassemble the pump for inspection.
- The pump supports both rigid and flexible connection installation methods.
Startup and Operation Procedures
Pre-Startup Preparation
- Test motor rotation direction – clockwise when viewed from the motor top. Keep test duration short to avoid dry-running mechanical seal damage.
- Open the vent valve to fill the pump body completely with liquid, then close the vent valve.
- Verify all components are in proper condition.
- Manually rotate the pump to allow lubricant to enter the mechanical seal face.
- For high-temperature models, preheat before startup at a rate of 50C per hour to ensure uniform heating of all components.
Startup Procedure
- Fully open the inlet valve.
- Close the discharge pipeline valve.
- Start the motor and verify correct pump rotation direction.
- Adjust the outlet valve opening to achieve the desired operating condition. If a flow meter or pressure gauge is installed at the pump outlet, adjust the valve opening so the pump operates at the rated point listed in the performance parameter table. Monitor motor current to ensure operation within rated current – exceeding rated current will cause motor overload and potential burnout. The optimal valve opening depends on specific pipeline conditions.
- Check shaft seal leakage – normal mechanical seal leakage should be less than 3 drops per minute. Verify motor and bearing temperatures do not exceed 70C.
Shutdown Procedure
- For high-temperature models, reduce temperature first at a rate below 10C per minute to below 80C before shutdown.
- Close the discharge pipeline valve.
- Stop the motor.
- Close the inlet valve.
- For extended shutdown periods, drain all liquid from the pump.
Maintenance Recommendations
Operational Maintenance
- The inlet pipeline must be fully filled with liquid – never operate the pump under cavitation conditions for extended periods.
- Regularly monitor motor current readings to ensure they do not exceed the rated current.
- After extended operation, if noise and vibration increase due to mechanical wear, stop the pump for inspection. Replace worn parts and bearings as needed. General overhaul interval is approximately one year.
Mechanical Seal Maintenance
- Seal lubrication fluid must be clean and free of solid particles.
- Never operate the mechanical seal under dry-running conditions.
- Before startup, manually rotate the pump (motor) several times to prevent sudden startup from causing graphite ring fracture.
- Permissible seal leakage is 3 drops per minute. Exceeding this requires inspection.
Troubleshooting Guide
| Fault | Possible Causes | Solutions |
|---|---|---|
| Pump fails to deliver water | Inlet/outlet valves not open; pipeline blockage; incorrect motor rotation; air leakage in suction line; pump not fully primed; insufficient inlet supply; excessive suction lift; excessive pipeline resistance | Inspect and clear blockages; correct motor direction and secure wiring; tighten all seals and purge air; open pump cover or vent valve to purge air; inspect and adjust; reduce pipeline bends and re-select pump |
| Insufficient flow rate | Pipeline/pump passage/impeller blockage; scale deposition; insufficient valve opening; low voltage; impeller wear | Clear blockages and adjust valve opening; stabilize voltage; replace impeller |
| Excessive power consumption | Operating beyond rated flow; excessive suction lift; bearing wear | Reduce flow by closing outlet valve; lower suction lift; replace bearings |
| Noise and vibration | Unstable pipeline support; liquid contains gas; cavitation occurring; bearing failure; motor overload overheating | Stabilize pipeline supports; increase suction pressure and vent; reduce vacuum level; replace bearings; adjust per overload procedures |
| Motor overheating | Excessive flow causing overload; component rubbing; bearing failure; insufficient voltage | Close outlet valve; inspect and resolve; replace bearings; stabilize voltage |
| Pump leakage | Mechanical seal wear; pump body sand holes or cracks; uneven sealing surface; loose mounting bolts | Replace seal; weld or replace body; resurface sealing face; tighten fasteners |
Why Choose Chaodun ISG Series Centrifugal Pumps?
As a leading vertical inline centrifugal pump manufacturer, Chaodun Pump brings decades of engineering expertise to every ISG series unit. Our vertical single-stage pipeline pumps are trusted across municipal water treatment, chemical processing, HVAC systems, and industrial applications worldwide. Whether you need a standard clean water pump, a high-temperature hot water circulation pump, a corrosion-resistant chemical pipeline pump, or an explosion-proof stainless steel chemical pump, our comprehensive product range has you covered.
Contact our engineering team for personalized pump selection assistance, technical specifications, and competitive pricing on the ISG series vertical centrifugal pump range.