The Wear-Resistant Screw Pump Stator is a core component of Progressive cavity pumps, engineered to provide exceptional durability and efficiency in handling abrasive, viscous, and chemically aggressive fluids. This stator is specially designed to resist mechanical wear and erosion, ensuring long service life and consistent performance even in the most demanding industrial applications.
Manufactured using premium elastomers such as Nitrile Rubber (NBR), EPDM, or HNBR, the wear-resistant stator provides excellent chemical compatibility, thermal stability, and abrasion resistance. Its precision-engineered cavity and wall thickness allow the rotor to operate efficiently, maintaining consistent flow, minimal pulsation, and high volumetric efficiency.
The stator is the stationary inner lining of the screw pump, which houses the helical rotor. Its wear-resistant design ensures:
Reduced abrasion when pumping slurries, sand-laden liquids, or chemical suspensions.
Long-lasting performance even under continuous operation.
Consistent cavity formation for stable, pulsation-free flow.
High efficiency, reducing energy consumption and operational downtime.
A well-engineered wear-resistant stator significantly reduces maintenance requirements and improves the pump’s overall reliability.
Elastomer Body:
Made from NBR, EPDM, HNBR, or polyurethane, the elastomer resists abrasion and chemical corrosion.
Outer Casing:
Rigid or semi-rigid shell to secure the elastomer inside the pump housing.
Inner Bore:
Precisely shaped to match the rotor profile, ensuring tight sealing and minimal leakage.
Wear-Resistant Profile:
Designed to handle high-viscosity, abrasive, or particulate-laden fluids without premature degradation.
Optional Coatings:
For specialized applications, coatings such as ceramic or PTFE can further enhance wear resistance.
The wear-resistant stator works with a helical rotor to create progressive cavities that transport fluid:
Fluid enters the suction port and becomes trapped in the cavities formed between rotor and stator.
As the rotor rotates eccentrically, the cavities move continuously towards the discharge, ensuring smooth, non-pulsating flow.
The wear-resistant elastomer protects the stator from abrasive solids and particulate fluids, maintaining performance and efficiency.
This design is essential for industrial pumping of slurries, high-viscosity liquids, and abrasive fluids, minimizing wear and maximizing operational uptime.
| Parameter | Description |
Material | NBR, EPDM, HNBR, or polyurethane elastomer |
Wall Thickness | Precision-engineered to resist wear |
Rotor Compatibility | Single screw, progressive cavity pumps |
Temperature Range | -20°C to 120°C (material dependent) |
Viscosity Range | 1 – 500,000 mPa·s |
Chemical Resistance | Oils, fuels, mild acids, alkalis, chemical suspensions |
Abrasion Resistance | High, suitable for slurries and particulate-laden fluids |
Life Expectancy | 12–48 months depending on application |
Size Range | Inner diameter 10–500 mm; length customizable |
Installation | Press-fit, clamp, or adhesive mounting |
High Abrasion Resistance: Handles slurry, sand, and particulate-laden liquids efficiently.
Durable Construction: Long service life reduces downtime and maintenance costs.
Chemical Compatibility: Resistant to oils, fuels, chemicals, and mild acids/alkalis.
High Efficiency: Maintains constant cavity volumes, reducing leakage and energy consumption.
Low Pulsation Flow: Ensures stable and smooth fluid transfer.
Versatile Applications: Suitable for industrial, chemical, food-grade, and wastewater processing.
Easy Maintenance: Modular and replaceable design allows quick stator swaps.
Temperature and Pressure Resistance: Operates under moderate to high temperatures and pressures.
Resins, adhesives, paints, coatings, and lubricants transfer.
Handles abrasive or chemically aggressive fluids.
Ideal for metering, batching, and dosing operations.
Transfer of honey, chocolate, peanut butter, syrups, sauces, and dairy products.
Low shear pumping preserves product texture.
Ensures consistent flow in batch filling and ingredient dosing.
Pumps lotions, creams, gels, and ointments safely.
Low shear preserves active ingredients and product consistency.
Supports CIP/SIP cleaning protocols for hygiene compliance.
Sludge, slurry, and dewatering applications.
Abrasion-resistant elastomer prevents premature wear.
Reliable pumping for filter press feeding and solids handling.
Paints, inks, adhesives, sealants transfer.
Provides consistent flow for dosing, mixing, and batching.
Reduces wear on rotors in abrasive or high-viscosity environments.
Clean the pump casing thoroughly.
Inspect the rotor for damage or wear.
Align the stator carefully with the rotor.
Press-fit, clamp, or adhere the stator according to manufacturer specifications.
Ensure proper rotor-stator alignment to prevent premature wear.
Start the pump at low speed, gradually increasing to operational RPM.
Monitor pressure, flow, and temperature during initial operation.
Avoid dry running, which can damage the elastomer.
For abrasive fluids, ensure correct feed rate and lubrication.
Stop pump gradually.
Flush with a compatible cleaning fluid.
Inspect the stator for wear and schedule maintenance as needed.
Daily: Flush with water or cleaning solution; wipe external surfaces.
Periodic: Inspect wall thickness, hardness, and surface integrity.
Replacement: Replace if tears, cracks, or excessive wear appear.
Tips: Avoid using sharp tools during cleaning to prevent damage to the elastomer.
| Problem | Possible Cause | Solution |
Low flow | Stator wear or rotor misalignment | Inspect and replace stator; realign rotor |
Noise | Rotor-stator contact or uneven wear | Check alignment; replace stator |
Leakage | Cracks or improper installation | Replace stator; ensure correct mounting |
Overheating | High viscosity or dry running | Reduce speed; ensure proper fluid presence |
Vibration | Rotor imbalance or worn stator | Balance rotor; replace stator |
Wear gloves and eye protection during installation and maintenance.
Do not exceed recommended temperature or pressure limits.
Avoid dry running; always maintain fluid in pump.
Follow manufacturer guidelines for installation, operation, and maintenance.
High Durability: Wear-resistant elastomer withstands abrasive fluids.
Consistent Flow: Maintains cavity volume for smooth, low-pulsation pumping.
Chemical Compatibility: Resistant to oils, chemicals, and mild acids/alkalis.
Versatile Applications: Food, chemical, pharmaceutical, and industrial fluids.
Easy Maintenance: Quick stator replacement reduces downtime.
Energy Efficient: Low friction and minimal leakage.
Q1. What is the maximum operating temperature?
A1. Standard: up to 120°C, depending on elastomer material.
Q2. Can it handle abrasive fluids?
A2. Yes, designed for slurries, particulate-laden liquids, and viscous fluids.
Q3. How long does a stator last?
A3. Typically 12–48 months, depending on application, fluid type, and operating conditions.
Q4. Is it suitable for food applications?
A4. Yes, FDA-approved elastomers are available for food, beverage, and pharmaceutical applications.
Q5. Can it be used for high-viscosity fluids?
A5. Yes, compatible with viscosities up to 500,000 mPa·s.
Q6. How do I replace the stator?
A6. Align rotor and pump casing, press-fit or clamp the new stator, verify alignment, and start gradually.
The Wear-Resistant Screw Pump Stator is an essential component for ensuring long-lasting, reliable, and efficient operation in progressive cavity pumps. Its abrasion-resistant elastomer, precision-engineered cavity, and chemical compatibility make it ideal for industrial, chemical, food, and pharmaceutical applications.
With features such as low pulsation, self-priming capability, high efficiency, and easy maintenance, this stator ensures stable fluid transfer, reduced energy consumption, and extended rotor life, making it a premium choice for modern screw pump systems handling abrasive, viscous, and particulate-laden fluids.
Copyright ? Jiangsu Longjie Pump Manufacturing Co., Ltd.
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