Gear Pump - Helical Series
The SD/SG Series Helical Gear Pump is a robust positive displacement pump designed for efficient transfer of viscous liquids, oils, petroleum products, and industrial fluids. It features single helical gears, hardened and ground shafts, and delivers smooth, pulsation-free flow with capacities up to 500 LPM and pressure up to 10 kg/cm².
- Pump Type
- Helical Gear Pump
- Gear Design
- Single Helical Gears
- Maximum Capacity
- 500 LPM
- Maximum Pressure
- 10 Kg/cm²
- Manufacturer since 1984
- ISO 14001 & 45001
- Application-led selection
Overview
About the Gear Pump - Helical Series
The SD/SG Series Helical Gear Pump is specially engineered for handling high-viscosity liquids in industrial applications. The pump utilizes precision-machined single helical gears that ensure continuous, low-noise, and vibration-free fluid transfer. Its rugged construction with hardened and ground shafts offers long service life and reliable performance under demanding operating conditions.
The pump is suitable for transferring oils, lubricants, petroleum products, molasses, syrups, chemicals, and other viscous fluids. Standard models can operate at temperatures up to 80°C, while specially modified versions are available for high-temperature applications up to 200°C, as well as vacuum and molasses handling applications.
Available in multiple sizes from ½” to 3”, the SD/SG Series delivers flow rates ranging from 20 LPM to 500 LPM. The pump is compact, energy-efficient, and easy to maintain, making it ideal for continuous-duty industrial operations.
Engineering Data
Technical Specifications
| Pump Type | Helical Gear Pump |
|---|---|
| Gear Design | Single Helical Gears |
| Maximum Capacity | 500 LPM |
| Maximum Pressure | 10 Kg/cm² |
| Standard Temperature | Up to 80°C |
| High Temperature Version | Up to 200°C |
| Port Sizes | ½” to 3” BSP |
| Speed Range | 150–1500 RPM |
| Viscosity Range | Up to 50,000 CST |
| Shaft Type | Hardened & Ground |
| Flow Characteristics | Smooth & Pulsation-Free |
Construction
Materials of Construction
Casing
CI Grade 20
Rear Cover
CI Grade 20
Gland Cover
CI Grade 20
Shafts
EN-9 Hardened & Ground
Gears
EN-8
Gland Seal
Oil Seal
Shaft Bearing
Sintered Bronze Bush
Use Cases
Industry Applications
- Transfer of viscous liquids
- Lubricating oil circulation systems
- Fuel oil and diesel transfer
- Petroleum and petrochemical industries
- Molasses and syrup handling
- Chemical processing plants
- Bitumen and heavy oil transfer
- Hydraulic oil transfer
- Industrial fluid circulation systems
- Vacuum applications (modified versions)
Selection Guide
Positive Displacement vs. Centrifugal Pumps
-
1
Positive displacement pumps suit controlled flow, higher viscosity, and pressure-sensitive transfer.
-
2
Centrifugal pumps suit continuous movement of clean, low-viscosity liquids at stable duty points.
-
3
Final selection should be based on duty point, fluid behavior, installation conditions, and maintenance goals.
For selection, share flow rate, discharge pressure or head, viscosity, temperature, solids content and installation conditions — our engineers will recommend the right gear configuration.
Questions
Frequently Asked Questions
What is Gear Pump - Helical Series used for?
Gear Pump - Helical Series is used for industrial liquid handling where the selected gear configuration matches flow, pressure, material compatibility, and site duty requirements.
How do I select the right gear model?
Share the fluid name, flow rate, head or pressure, viscosity, temperature, solids content, installation details, and operating hours so the team can recommend a suitable model.
Can Sando support industrial pump manufacturer?
Yes. Sando Rotary can review the duty conditions and suggest suitable products, materials, elastomers, and accessories for industrial pump manufacturer.
Do you provide technical specifications and application guidance?
Yes. Specifications, catalogs, material guidance, performance details, and application support can be shared for procurement and engineering review.
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