The rotor features high-quality surface characteristics. Advanced production, grinding, and coating processes are employed to ensure the rotor's high quality and corresponding surface finish. Through the use of various grinding and polishing processes, surface roughness is significantly reduced, thereby improving the rotor's fatigue and corrosion resistance, as well as its wear resistance and hardness. The benefits of this surface optimization include reduced starting and operating torque, improved hydraulic efficiency, smooth operation, and increased service life.
Screw pump rotors with large curvature provide high flow rates, while small curvature provides high head.
The High-Flow Screw Pump Rotor is a critical component in Progressive cavity pumps, designed to provide efficient and reliable fluid transfer, especially for high-flow and high-viscosity applications. These rotors are engineered to maintain consistent cavity volume, high volumetric efficiency, and low pulsation, ensuring optimal performance in industrial, chemical, food, and wastewater operations.
Constructed from high-strength stainless steel, duplex steel, or wear-resistant alloys, high-flow rotors are built to withstand abrasion, corrosion, and mechanical stress. Combined with wear-resistant stators, they provide long service life, energy-efficient operation, and minimal maintenance requirements.
The screw pump rotor works in conjunction with a stator to form progressive cavities that move fluid from the suction side to the discharge side. The high-flow rotor is specifically engineered to:
Handle large volumetric flow rates while maintaining low pulsation.
Work with high-viscosity, abrasive, or chemically aggressive fluids.
Ensure even cavity formation to optimize pump efficiency.
Reduce rotor-stator wear through precise geometrical design.
High-flow rotors are available in single or multiple lobe designs, depending on the required flow rate and fluid properties.
Rotor Body:
Made from high-strength stainless steel or duplex steel, precision-machined to tight tolerances.
Helical Lobe:
Forms cavities in cooperation with the stator, ensuring smooth, continuous fluid flow.
Surface Hardening:
Some rotors feature chromium or nitride coatings to improve wear and corrosion resistance.
Shaft Interface:
Precisely machined to ensure proper coupling with the pump drive, reducing vibration and stress.
Optional Coatings:
Advanced coatings may include ceramic or PTFE layers for extreme abrasion or chemical resistance.
The high-flow screw pump rotor operates on the progressive cavity principle:
The rotor rotates eccentrically within the stator.
The combination of rotor and stator forms a series of sealed cavities that transport fluid.
Fluid is trapped and moved progressively from suction to discharge.
The rotor's geometry ensures constant cavity volume, low pulsation, and minimal backflow.
High-flow rotors are optimized to provide maximum volumetric efficiency while minimizing wear, energy consumption, and maintenance.
| Parameter | Description |
Material | Stainless steel 316/304, duplex steel, or wear-resistant alloy |
Lobe Configuration | Single, double, or multi-lobe |
Surface Treatment | Hardening, nitriding, or chrome plating for wear resistance |
Temperature Range | -20°C to 150°C (material dependent) |
Viscosity Range | 1 – 500,000 mPa·s |
Flow Capacity | Up to 500 m3/h (application dependent) |
Pressure Range | Up to 25 bar standard, high-pressure designs up to 50 bar |
Abrasion Resistance | High, suitable for slurries and particulate fluids |
Life Expectancy | 12–60 months depending on application and fluid |
Installation | Direct coupling to pump shaft, alignment critical |
High Flow Capacity: Supports large volumetric transfer for industrial processes.
Wear Resistance: Stainless steel and surface treatments extend rotor lifespan.
Chemical Compatibility: Resistant to oils, fuels, chemicals, and mild acids/alkalis.
Low Pulsation: Maintains steady fluid flow, reducing system stress.
High Efficiency: Optimized cavity design minimizes energy loss.
Versatile Applications: Ideal for industrial, chemical, food, pharmaceutical, and wastewater operations.
Easy Replacement: Modular design allows quick rotor swaps.
Durable Construction: Handles high-viscosity and abrasive fluids effectively.
Transfer of resins, adhesives, lubricants, polymers, paints, and coatings.
Handles abrasive, viscous, and chemically aggressive fluids.
Supports batching, dosing, and metering applications.
Pumps chocolate, honey, peanut butter, sauces, syrups, and dairy products.
Low shear preserves texture and quality.
Suitable for ingredient dosing, batch filling, and high-volume transfer.
Pumps lotions, creams, gels, and ointments.
Preserves active ingredients due to low shear.
Compatible with CIP/SIP cleaning procedures.
Sludge, slurry, and abrasive particulate transfer.
Abrasion-resistant rotor ensures long operational life.
Suitable for filter press feeding, dewatering, and solids handling.
Transfers paints, inks, adhesives, sealants, and lubricants.
Provides consistent flow for dosing, mixing, and batching operations.
Reduces wear on rotors when handling abrasive or high-viscosity fluids.
Clean the pump casing thoroughly.
Inspect rotor and stator for wear or damage.
Align the rotor precisely with the pump shaft and stator.
Ensure proper coupling to prevent vibration and misalignment.
Test rotation manually before initial startup to ensure smooth motion.
Start at low RPM, gradually increasing to operational speed.
Monitor pressure, flow, and temperature.
Avoid dry running, as it can damage rotor and stator.
For abrasive or high-viscosity fluids, ensure proper feed rate and lubrication.
Gradually stop the pump.
Flush the rotor and stator with compatible cleaning fluid.
Inspect for wear, corrosion, or deformation.
Daily: Inspect external components and flush pump.
Periodic: Check rotor for wear, surface integrity, and alignment.
Replacement: Replace rotor if excessive wear, scoring, or corrosion is observed.
Tips: Avoid using metallic tools directly on rotor surface to prevent scratches.
| Problem | Cause | Solution |
Low flow | Rotor wear or misalignment | Inspect and replace rotor; realign pump |
Noise | Rotor-stator contact | Check alignment; replace rotor or stator |
Leakage | Rotor damage or improper fit | Replace rotor; ensure proper installation |
Overheating | High-viscosity fluid or dry run | Reduce speed; ensure proper lubrication |
Vibration | Rotor imbalance | Rebalance rotor; check stator condition |
Wear protective gloves and eye protection when handling rotors.
Do not exceed maximum temperature or pressure ratings.
Avoid dry running; always maintain fluid in the pump.
Follow manufacturer instructions for installation and maintenance.
High Flow Efficiency: Optimized for large volumetric transfer.
Wear-Resistant Construction: Long-lasting rotor for abrasive fluids.
Chemical Compatibility: Resistant to oils, chemicals, and mild acids/alkalis.
Low Pulsation: Ensures smooth, stable fluid transfer.
Versatile Applications: Suitable for industrial, chemical, food, and pharmaceutical sectors.
Easy Maintenance: Modular design allows quick replacement.
Q1. What materials are available for high-flow rotors?
A1. Stainless steel (304/316), duplex steel, HNBR-coated, or wear-resistant alloys.
Q2. Can these rotors handle abrasive fluids?
A2. Yes, specially designed for slurries, particulate-laden fluids, and high-viscosity liquids.
Q3. What is the maximum operating temperature?
A3. Depends on material, typically -20°C to 150°C.
Q4. How often should rotors be replaced?
A4. Typically 12–60 months, depending on fluid type, viscosity, and abrasion.
Q5. Are high-flow rotors compatible with food-grade applications?
A5. Yes, stainless steel 316L rotors with FDA-approved coatings are available.
Q6. How do I install a replacement rotor?
A6. Align rotor with pump shaft and stat
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