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High Efficiency Industrial Arc Gear Oil Pump for Lubricating Oil, Heavy Oil, Diesel Fuel and Hydraulic Fluid Transfer Systems
2026-05-15 17:28
The Arc Gear Oil Pump is a high-efficiency positive displacement pump specially designed for transferring lubricating oils, hydraulic oils, fuel oils, diesel, heavy oil, and other viscous liquids without solid particles or fibers. Featuring advanced double circular-arc gear technology, this pump delivers stable flow, low noise operation, high efficiency, and long service life. It is widely used in petroleum, chemical processing, marine engineering, hydraulic systems, fuel delivery systems, lubrication stations, power plants, construction machinery, and industrial manufacturing applications.
Compared with traditional involute gear pumps, the arc gear structure significantly reduces gear surface friction during meshing. The tooth profile minimizes sliding friction, which effectively decreases wear, vibration, and noise while improving volumetric efficiency and operational stability. This advanced design makes the Arc Gear Oil Pump an ideal solution for continuous-duty industrial fluid transfer applications.
The pump body is typically manufactured from high-quality cast iron, cast steel, or stainless steel materials depending on the working medium and operating environment. Stainless steel versions are suitable for corrosive liquids and high-temperature media, while cast iron models are commonly used for lubricating oils and industrial fluids. The pump can operate with media viscosities ranging from 5 cSt to 1500 cSt, making it suitable for both light oils and high-viscosity fluids.
Structural Features
The Arc Gear Oil Pump mainly consists of:
- Double arc gears
- Pump casing
- Pump cover
- Drive shaft
- Bearing sleeves
- Mechanical seal or packing seal
- Relief safety valve
The double circular-arc gear profile is the core technology of the pump. During operation, the gears mesh smoothly without significant relative sliding, reducing mechanical wear and improving sealing performance. This structure eliminates trapped liquid phenomena commonly found in conventional gear pumps, resulting in lower pulsation and quieter operation.
The built-in safety relief valve protects the pump against overload conditions. The valve is usually set at approximately 1.5 times the rated discharge pressure and can be adjusted according to operating requirements. This design ensures safe and reliable operation under varying working conditions.
Two shaft sealing options are generally available:
- Mechanical Seal
Provides excellent leakage prevention and is suitable for clean fluids and higher-pressure applications. - Packing Seal
Suitable for standard industrial applications with convenient maintenance and lower operating cost.
Special customized designs such as magnetic drive sealing, heating jackets, explosion-proof motors, and stainless steel construction can also be provided according to customer requirements.
Working Principle
The Arc Gear Oil Pump operates based on the positive displacement principle. When the gears rotate, cavities formed between the gear teeth and pump casing create suction at the inlet side. The liquid is drawn into these cavities and transported around the casing toward the discharge side. As the gears mesh again, the liquid is forced out under pressure through the outlet port.
Because the arc gear profile reduces fluid turbulence and internal leakage, the pump maintains stable flow and high transfer efficiency even under high viscosity conditions. The self-priming capability allows easy startup and reliable operation in fuel transfer and lubrication systems.
Main Advantages
High Efficiency
The advanced arc tooth design minimizes friction losses and improves transmission efficiency compared with conventional gear pumps.
Low Noise Operation
Smooth gear meshing reduces vibration and noise, making the pump suitable for environments requiring quiet operation.
Long Service Life
Reduced gear wear significantly extends the operational lifespan of the pump and lowers maintenance requirements.
Stable Flow Output
The pump provides continuous and stable liquid delivery with minimal pulsation.
Wide Viscosity Range
Suitable for transferring low-viscosity and high-viscosity liquids.
Strong Self-Priming Ability
The pump can quickly establish suction and maintain stable operation during startup.
Reliable Overload Protection
Integrated relief valve protects the system from excessive pressure.
Easy Maintenance
Simple structure allows convenient inspection, servicing, and replacement of wear parts.
Technical Parameters
Typical operating specifications include:
- Flow Capacity: 0.6 – 80 m³/h
- Pressure Range: 0.6 – 2.5 MPa
- Viscosity Range: 5 – 1500 cSt
- Temperature Range:
- Cast Iron: ≤120°C
- Cast Steel/Stainless Steel: ≤280°C
- Cast Iron: ≤120°C
- Speed Range: 900 – 1450 rpm
- Materials:
- Cast Iron
- Cast Steel
- Stainless Steel 304
- Stainless Steel 316/316L
- Cast Iron
Actual specifications may vary according to different models and working conditions.
Application Industries
The Arc Gear Oil Pump is widely used in:
- Petroleum industry
- Chemical industry
- Marine engineering
- Power plants
- Hydraulic systems
- Lubrication systems
- Fuel supply systems
- Asphalt and heavy oil transfer
- Construction machinery
- Metallurgy industry
- Industrial equipment manufacturing
It can serve as:
- Oil transfer pump
- Booster pump
- Fuel injection pump
- Hydraulic power pump
- Lubrication pump
- Circulation pump
Installation and Maintenance
To ensure optimal performance, the pump should be installed with proper alignment between the motor and pump shaft. The inlet piping should remain airtight to prevent air leakage and cavitation. Before startup, the pump chamber should be filled with liquid to avoid dry running.
Regular maintenance recommendations include:
- Inspecting shaft seals
- Checking bearing lubrication
- Cleaning filters and pipelines
- Monitoring operating pressure and temperature
- Inspecting safety valve operation
Routine maintenance can effectively extend service life and improve operational reliability.
Conclusion
The Arc Gear Oil Pump is an advanced industrial fluid transfer solution combining high efficiency, low noise, stable performance, and long service life. Its innovative circular-arc gear design significantly improves operational reliability and reduces maintenance costs. With excellent adaptability to different viscosities and operating environments, the pump is widely recognized as an ideal choice for oil transfer, lubrication, hydraulic systems, and fuel delivery applications across numerous industries.
Whether used in petroleum transportation, industrial lubrication, marine systems, or hydraulic engineering, the Arc Gear Oil Pump delivers reliable and efficient performance for continuous industrial operations.
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