High-pressure screw pump rotors are essential components in Progressive cavity pumps, designed to handle high-pressure, high-viscosity, and abrasive fluids in demanding industrial environments. These rotors are engineered to maintain consistent cavity volumes, minimize pulsation, and provide reliable fluid transfer under high-pressure conditions.
Constructed from high-strength stainless steel, duplex steel, or wear-resistant alloys, these rotors are precision-machined to exact tolerances. Surface treatments such as hardening, nitriding, or chrome plating enhance resistance to abrasion, corrosion, and mechanical stress, ensuring a long service life and reduced maintenance.
High-pressure screw pump rotors are widely used in chemical, food, pharmaceutical, and environmental industries, where reliable, high-pressure fluid transfer is critical.
High-pressure screw pump rotors are designed to:
Handle elevated pressures without deformation.
Maintain precise cavity formation for efficient pumping.
Provide smooth, low-pulsation flow to reduce system stress.
Resist wear and abrasion from particulate-laden or viscous fluids.
The rotor’s geometry is optimized for high-pressure operation, often with reinforced lobes and tight tolerances to withstand mechanical loads.
Rotor Body:
High-strength steel or alloy for maximum durability under high-pressure conditions.
Helical Lobes:
Form progressive cavities with the stator, moving fluid efficiently from suction to discharge.
Shaft Interface:
Precisely machined for secure coupling with pump drives, minimizing vibration.
Surface Treatment:
Hardened, nitrided, or chrome-plated surfaces resist wear and corrosion.
Optional Coatings:
Ceramic or PTFE coatings for enhanced abrasion and chemical resistance in extreme applications.
The high-pressure rotor works in conjunction with a wear-resistant stator to create progressive cavities:
Fluid enters the pump suction port and is trapped in cavities between rotor and stator.
As the rotor rotates eccentrically, cavities move progressively toward the discharge port.
High-pressure rotors maintain consistent cavity volume, reducing pulsation and backflow.
Designed for high-pressure applications, the rotor ensures stable, continuous fluid transfer without leakage.
| Parameter | Description |
Material | Stainless steel 316L/304, duplex steel, alloy steel |
Rotor Type | Single-lobe, double-lobe, multi-lobe |
Surface Treatment | Hardening, nitriding, chrome plating |
Maximum Pressure | Up to 50 bar (standard), higher for custom designs |
Temperature Range | -20°C to 150°C (material dependent) |
Flow Capacity | 1 – 500 m3/h, depending on pump size |
Viscosity Range | 1 – 500,000 mPa·s |
Abrasion Resistance | High, suitable for slurries and particulate fluids |
Rotor Life | 12–60 months depending on fluid and operating conditions |
Installation | Shaft coupling, alignment critical for high-pressure operation |
High-Pressure Capability: Designed for pressures up to 50 bar or higher.
Wear-Resistant Construction: Hardened surfaces resist abrasion and corrosion.
Smooth Flow: Low pulsation reduces system stress and energy consumption.
High Efficiency: Optimized cavity design maintains volumetric efficiency.
Versatile Applications: Suitable for chemical, food, pharmaceutical, and environmental industries.
Durable and Reliable: Long operational life reduces downtime and maintenance costs.
Easy Maintenance: Modular rotor design allows quick replacement.
Chemical Compatibility: Resistant to oils, chemicals, and mild acids/alkalis.
Transfer of resins, adhesives, paints, coatings, and lubricants at high pressure.
Ideal for abrasive, viscous, or chemically aggressive fluids.
Used in metering, batching, and high-pressure dosing operations.
Pumps chocolate, honey, sauces, syrups, and dairy products.
High-pressure rotors maintain consistent flow in high-volume production lines.
Low shear design preserves texture, quality, and consistency.
Pumps lotions, creams, gels, and ointments with high-pressure delivery.
Preserves active ingredients during high-pressure transfer.
Compatible with CIP/SIP cleaning protocols.
Pumps slurries, sludge, and abrasive waste fluids under high pressure.
Ensures reliable feed to filter presses and dewatering systems.
Resistant to wear from solids-laden fluids.
Handles paints, inks, sealants, and lubricants at high pressure.
Provides stable flow for dosing, mixing, and batch processing.
Reduces wear in abrasive or viscous fluid applications.
Inspect pump housing and rotor for damage or defects.
Align rotor precisely with the pump shaft and stator.
Secure rotor with manufacturer-specified couplings.
Rotate manually to ensure smooth operation before starting.
Verify alignment and secure all components to handle high-pressure operation.
Start pump at low RPM, gradually increasing to operational speed.
Monitor pressure, flow, and temperature during startup.
Avoid dry running, which can damage rotor and stator.
For abrasive or viscous fluids, maintain proper feed and lubrication.
Ensure pressure relief valves are installed to prevent overpressure.
Daily: Inspect external components; flush with compatible fluid.
Periodic: Check rotor for wear, cracks, or deformation.
Replacement: Replace rotor if excessive wear or damage is detected.
Tips: Avoid metallic tools that may scratch the rotor surface.
| Problem | Cause | Solution |
Low flow | Rotor wear or misalignment | Inspect rotor; realign or replace |
Noise | Rotor-stator contact | Check alignment; replace worn rotor |
Leakage | Rotor damage | Replace rotor; check installation |
Overheating | High-viscosity fluid or dry run | Reduce speed; maintain proper lubrication |
Vibration | Rotor imbalance | Rebalance rotor; inspect stator |
Always wear protective gloves and eye protection.
Do not exceed maximum pressure or temperature limits.
Avoid dry running.
Follow manufacturer instructions for high-pressure installation, operation, and maintenance.
Q1. What materials are used for high-pressure rotors?
A1. Stainless steel 316/304, duplex steel, or wear-resistant alloys.
Q2. Can high-pressure rotors handle abrasive fluids?
A2. Yes, designed for slurries, high-viscosity, and solids-laden fluids.
Q3. Maximum operating pressure?
A3. Standard high-pressure rotors handle up to 50 bar, with custom designs exceeding 100 bar.
Q4. How long do high-pressure rotors last?
A4. 12–60 months depending on fluid type, pressure, and operating conditions.
Q5. Are these rotors suitable for food applications?
A5. Yes, stainless steel 316L with FDA-approved coatings is available.
Q6. How is rotor replacement performed?
A6. Align rotor with pump shaft and stator, secure coupling, verify alignment, and start gradually.
High Pressure Capacity: Handles high-pressure fluids reliably.
Durable Construction: Hardened surfaces resist abrasion and wear.
Smooth Flow: Reduces pulsation and system stress.
Chemical Compatibility: Suitable for chemical, food, pharmaceutical, and environmental applications.
Energy Efficient: Low friction design reduces power consumption.
Versatile Applications: Chemical, food, pharmaceutical, wastewater, and industrial sectors.
Easy Maintenance: Modular design allows quick rotor replacement.
Extended Life: Robust materials and design withstand high-stress environments.
High-pressure screw pump rotors are critical for efficient and reliable fluid transfer under high-pressure conditions. Their precision-engineered geometry, wear-resistant construction, and chemical compatibility make them ideal for industrial, chemical, food, pharmaceutical, and environmental applications.
With features like low pulsation, high volumetric efficiency, long operational life, and easy maintenance, high-pressure rotors are an essential investment to maximize pump performance, reduce downtime, and ensure safe, consistent fluid delivery in demanding industrial processes.
Copyright ? Jiangsu Longjie Pump Manufacturing Co., Ltd.
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