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Rotary Gear Pump
The UM Series was designed with handling of oil and viscous fluids in mind. When transferring heavy chemicals, lubricants, fuel oil, or crude oil, it offers reliable discharge even at higher viscosities.
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Industrial Rotary Gear Pump for Transferring High-Viscosity Fluids
The UM Series was designed with handling of oil and viscous fluids in mind. When transferring heavy chemicals, lubricants, fuel oil, or crude oil, it offers reliable discharge even at higher viscosities.
Key design highlights:
- Double helical gear construction
- Virtually pulsation-free output
- Built-in relief valve (standard)
- Optional supply without a relief valve
- Jacketed construction available for heating or cooling
Because of this, the unit is perfect for applications requiring high viscosity and temperature.
Technical Specifications of Rotary Gear Oil Pump
| Parameter | Specification |
|---|---|
| Pump Type | Positive Displacement, Double Helical Gear |
| Capacity Range | 25 LPM to 135 LPM |
| Standard Working Pressure | 7 kg/cm² |
| Maximum Pressure (Optional) | Up to 30 kg/cm² |
| Operating Temperature | Up to 115° |
| Relief Valve | Built-in (Standard) / Optional |
| Pump Body Material | Close Grain Cast Iron (ASTM A216 WCB) |
| Optional Body Materials | SS 410 / SS 304 / SS 316 |
| Gear Material | Carbon Steel EN-24 / SA 8620 |
| Optional Gear Material | SS 410 / SS 304 / SS 316 |
| Shaft Material | Carbon Steel EN-19 / SA 8620 |
| Optional Shaft Material | SS 410 / SS 304 / SS 316 / Alloy-20 |
| Special Options | Jacketed body, hardened & ground gears |
Rotary Gear Oil Pump Performance & Operating Limits
The rotary gear oil pump is built to generate a consistent output under a variety of load and viscosity conditions. Its twin helical gear design ensures a smooth, nearly pulsation-free discharge over the designated working range.
Performance Range:
- Flow Capacity: 25 LPM to 135 LPM
- Standard Working Pressure: 7 kg/cm²
- Maximum Pressure (Optional): Up to 30 kg/cm²
- Maximum Operating Temperature: 115°C
- Suitable for low to high-viscosity fluids
- Designed for continuous-duty industrial operation
Rotary gear pumps are used for heavy chemical handling, lubrication circulation and oil transfer, subject to fluid compatibility and operating limits. For packaged transfer installations, they can be considered within liquid transfer skids according to project requirements.
Industrial Applications of Rotary Gear Systems
This equipment performs well when viscosity is high and flow stability is essential.
Common industries include:
- Refinery technology
- Petrochemical industries
- Crude oil transfer systems
- Fuel oil firing systems
- Soap, fatty acid, and glycerin plants
- Edible oil processing
- Synthetic detergent manufacturing
- Lubrication systems
- Rayon and polymer processing
These sectors rely on steady, controlled transmission under difficult working conditions.
Rotary Gear Pump with Motor and Head Configurations
We provide a variety of configuration choices to meet various industrial needs:
- Complete rotary gear pump with motor assemblies
- Jacketed construction for heating or cooling applications
- High-pressure variants up to 30 kg/cm²
- Pumps with or without a built-in relief valve
- Bare rotary gear pump head units
- Custom material options, including cast iron and stainless steel grades
Each unit can be configured using the necessary flow rate (25–135 LPM), operating temperature, viscosity, and pressure conditions.
Trusted Rotary Gear Pump Manufacturers
As part of our industrial pump range, we supply rotary gear pumps with application-specific material and configuration options.
What sets us apart:
- Balanced gear design for reduced wear
- Precision hob-cut gears
- Material flexibility for corrosive or high-temperature fluids
- Simple construction for easy maintenance
- Reliable supply for industrial-duty applications
Every unit is built to last a long time, have minimal downtime, and work reliably.
Operating Principle
The following positive displacement mechanism powers the pump:
- Drive Gear
- Driven Gear
During rotation:
- Fluid enters through the suction port.
- Liquid fills the cavities between gear teeth and casing.
- As gears mesh at discharge, fluid is pushed out evenly.
This procedure guarantees a steady, almost pulsation-free flow that is appropriate for heavy fluid transfer systems, lubrication systems, and oil systems.
Rotary Gear Oil Pump Installation & Maintenance Guidelines
Long working life and reliable performance are guaranteed by proper installation and regular maintenance.
Installation:
- Align the pump and motor properly
- Keep the suction line airtight
- Avoid dry running
- Use strainers for contaminated fluids
- Ensure stable base mounting
Maintenance:
- Inspect seals and bearings regularly
- Check gear wear periodically
- Test the relief valve operation
- Monitor vibration and temperature
Proper maintenance reduces downtime and maintains dependable industrial performance.
Get a Quote for Rotary Gear System
Contact NND Oil & Gas with your fluid type, viscosity, required flow rate, operating temperature and discharge pressure. Our team can review your requirements and provide a suitable pump configuration and quotation.
Frequently asked questions
When a constant flow is needed, it is employed to transfer light to extremely viscous fluids like fuel oil, crude oil, lubricants, culinary oils, and industrial chemicals.
Typical weights are 7 kg/cm². High-pressure variants are available up to 30 kg/cm², depending on application requirements.
Indeed. Depending on the properties of the fluid and the working environment, shaft designs, jacketed construction, material choice, and pressure rating can all be altered.
Yes. The design is perfect for both light and heavy viscous liquids since it ensures a smooth and stable discharge even at higher viscosities.
Yes, a built-in relief valve is supplied as standard. Pumps can also be provided without a relief valve if required.
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