High-flow screw pump rotors are the core components of progressive cavity and screw pumps designed for high-capacity fluid transfer in demanding industrial applications. These rotors enable pumps to handle large volumes of viscous, abrasive, or particulate-laden fluids while maintaining smooth, consistent flow and minimal pulsation.
Manufactured using premium materials such as 316L stainless steel, duplex steel, or specialized alloys, high-flow rotors are engineered to resist wear, corrosion, and mechanical stress, ensuring long-term reliability in industrial, chemical, food, and wastewater applications.
Key benefits include high volumetric efficiency, extended rotor life, and low maintenance costs, making these rotors ideal for high-flow chemical dosing, viscous product transfer, and abrasive slurry handling.
The rotor is the rotating element inside the pump stator. Its helical geometry forms cavities with the stator, allowing fluid to move progressively from suction to discharge. High-flow rotors are specifically designed to:
Deliver maximum flow at low rotational speed.
Maintain stable cavity volume for consistent flow.
Minimize shear stress, protecting sensitive fluids.
Reduce rotor-stator wear through optimized geometry.
Advanced design features include precision machining, hardened surfaces, and optional coatings, which extend the rotor’s lifespan and improve efficiency.
Helical Rotor Body:
Precision-machined from stainless steel, duplex steel, or wear-resistant alloys to form cavities with the stator.
Shaft Interface:
Accurately machined to ensure tight coupling with pump drives, preventing vibration and misalignment.
Surface Treatment:
Hardening, nitriding, or chrome plating enhances abrasion and corrosion resistance.
Lobe Design:
Single, double, or multi-lobe configurations for different flow capacities.
Optional Coatings:
PTFE, ceramic, or HVOF coatings provide extra protection in aggressive or abrasive applications.
The high-flow rotor works in combination with a wear-resistant stator to form sealed cavities. As the rotor turns eccentrically:
Fluid is trapped between rotor lobes and stator cavities.
The progressive cavity motion moves fluid smoothly from suction to discharge.
The rotor ensures constant volumetric efficiency, low pulsation, and reduced backflow.
The high-flow design maximizes fluid throughput while maintaining pump longevity and operational efficiency.
| Parameter | Description |
Material | 316L/304 stainless steel, duplex steel, alloy steel |
Rotor Type | Single-lobe, double-lobe, multi-lobe |
Surface Treatment | Hardening, nitriding, or chrome plating |
Temperature Range | -20°C to 150°C (material dependent) |
Flow Capacity | Up to 500 m3/h or higher depending on pump size |
Pressure Limit | Standard up to 25 bar; high-pressure designs up to 50 bar |
Viscosity Range | 1 – 500,000 mPa·s |
Abrasion Resistance | High, suitable for slurries and abrasive fluids |
Rotor Life | 12–60 months, depending on fluid and operating conditions |
Installation | Direct shaft coupling, alignment required |
High Flow Efficiency: Optimized for high-volume fluid transfer.
Wear-Resistant: Hardened or coated surfaces resist abrasive wear.
Chemical Compatibility: Resistant to a wide range of industrial fluids.
Low Pulsation Flow: Smooth fluid delivery reduces system stress.
Energy Efficient: Low friction design reduces power consumption.
Versatile Applications: Ideal for chemical, food, pharmaceutical, and wastewater industries.
Easy Maintenance: Rotors are modular and easily replaceable.
Extended Operational Life: High-quality materials and design reduce downtime.
Transfer of resins, adhesives, paints, coatings, and lubricants.
Handles abrasive, viscous, and chemically aggressive fluids.
Ideal for dosing, batching, and metering operations.
Pumps honey, chocolate, peanut butter, syrups, sauces, and dairy products.
Low shear preserves texture, consistency, and quality.
Suitable for batch filling, ingredient dosing, and high-volume transfer.
Pumps lotions, creams, gels, and ointments.
Preserves active ingredients with gentle pumping action.
Compatible with CIP/SIP cleaning protocols for hygiene compliance.
Transfers sludges, abrasive slurries, and dewatering applications.
Abrasion-resistant rotor ensures long operational life.
Reliable for filter press feeding, solids handling, and slurry transport.
Transfers paints, inks, adhesives, sealants, and lubricants.
Provides consistent flow for dosing, mixing, and batching operations.
Reduces wear when pumping abrasive or viscous fluids.
Thoroughly clean pump housing before installation.
Inspect rotor and stator for wear, cracks, or defects.
Carefully align rotor with pump shaft and stator.
Secure rotor using manufacturer-specified coupling or fasteners.
Test rotor rotation manually before initial startup.
Start at low RPM, gradually increase to operational speed.
Monitor pressure, flow, and temperature during startup.
Avoid dry running, which can damage rotor and stator.
For abrasive or high-viscosity fluids, ensure proper feed rate and lubrication.
Daily: Flush rotor with compatible cleaning fluid; inspect externally.
Periodic: Check rotor for wear, corrosion, or deformation.
Replacement: Replace rotor if surface wear, scoring, or damage is observed.
Tips: Avoid sharp tools when cleaning to prevent surface scratches.
| Problem | Possible Cause | Solution |
Low flow | Rotor wear or misalignment | Inspect rotor; realign pump |
Excess noise | Rotor-stator contact or vibration | Check alignment; replace rotor if worn |
Leakage | Rotor damage or improper fit | Replace rotor; ensure proper installation |
Overheating | High-viscosity fluids or dry running | Reduce speed; ensure proper lubrication |
Vibration | Rotor imbalance or stator wear | Balance rotor; inspect stator |
Wear protective gloves and eye protection during installation and maintenance.
Do not exceed specified temperature or pressure limits.
Avoid dry running, always maintain fluid in pump.
Follow manufacturer guidelines for installation, operation, and maintenance.
Q1. What materials are used for high-flow rotors?
A1. Stainless steel 316/304, duplex steel, or wear-resistant alloys.
Q2. Are these rotors suitable for abrasive fluids?
A2. Yes, designed for slurries, high-viscosity, and particulate-laden fluids.
Q3. Maximum operating temperature?
A3. Typically -20°C to 150°C, depending on material.
Q4. Rotor lifespan?
A4. 12–60 months depending on fluid, viscosity, and operating conditions.
Q5. Can high-flow rotors be used in food-grade applications?
A5. Yes, stainless steel 316L rotors with FDA-approved coatings are available.
Q6. How is a replacement rotor installed?
A6. Align rotor with pump shaft and stator, secure coupling, verify alignment, and start gradually.
High Flow Capacity: Optimized for large fluid volumes.
Wear Resistance: Hardened surfaces resist abrasion.
Chemical Compatibility: Suitable for industrial, chemical, and food-grade fluids.
Low Pulsation: Ensures smooth and stable fluid transfer.
Energy Efficient: Optimized geometry reduces power consumption.
Versatile Applications: Chemical, food, pharmaceutical, wastewater, and industrial sectors.
Easy Maintenance: Quick rotor replacement reduces downtime.
Long Service Life: Robust materials and design withstand high-stress operations.
High-flow screw pump rotors are essential for efficient, reliable, and high-capacity fluid transfer in modern industrial applications. Their precision-engineered helical design, wear-resistant construction, and chemical compatibility make them suitable for viscous, abrasive, and sensitive fluids across food, chemical, pharmaceutical, and environmental industries.
With features such as low pulsation, high volumetric efficiency, easy maintenance, and long operational life, high-flow rotors are a critical investment for maximizing pump performance, reducing downtime, and ensuring consistent fluid delivery in demanding processes.
Copyright ? Jiangsu Longjie Pump Manufacturing Co., Ltd.
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