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2026-10-29 
Industry News 
As a Rotors for C Series supplier, Jiangsu Sharp Pump Co., Ltd. supplies precision-machined replacement rotors that restore original pump displacement and pressure in C Series progressive cavity pumps. These rotors are built for space-constrained installations where maintenance must be fast and components must withstand abrasive or corrosive service. We support water treatment, industrial sludge, and lime dosing operations with rotors that match the original equipment interface without modification.
C Series Rotor Application Fit
Our C Series rotors are engineered for progressive cavity pumps operating in tight layouts where downtime is costly. The rotor geometry mirrors the original displacement and pressure capability, so the pump returns to its designed flow and pressure curve after replacement. Typical applications include:
- Water treatment – dosing and transfer of lime slurry, polymer, and conditioned sludge.
- Industrial sludge – thickened or dewatered sludge with moderate solids content.
- Lime dosing – abrasive calcium hydroxide slurries requiring wear-resistant rotor surfaces.
- General chemical transfer – low-shear movement of viscous or shear-sensitive fluids.
For other progressive cavity pump series, explore our full Progressive Cavity Pump Rotor range.
Materials and Surface Treatments
We machine C Series rotors from stainless steel grades selected for the pumped medium and operating temperature. Surface treatments extend service life in abrasive or corrosive conditions. The table below summarizes our standard material and coating options.
| Rotor Material | Surface Treatment | Typical Application |
|---|---|---|
| SS304 | None, chrome-plated, or carbide-coated | General water, light sludge, non-corrosive chemicals |
| SS316 / 316L | None, chrome-plated, or carbide-coated | Corrosive media, chemical dosing, food-grade applications |
| Duplex stainless steel (2205) | Chrome-plated or carbide-coated | High chloride, abrasive slurries, aggressive industrial sludge |
Pair these rotors with our Stators for C Series for a matched wear set that maintains the original rotor-stator interference.
Dimensional Compatibility and Performance
Each C Series rotor is produced to match the original equipment dimensions, including pitch, diameter, eccentricity, and drive-end connection. This ensures the rotor fits the existing stator and coupling rod without rework. Key performance characteristics we preserve include:
- Displacement per revolution – identical geometry maintains rated flow at a given speed.
- Pressure capability – rotor-stator sealing line matches the original stage count and pressure rating.
- Drive interface – coupling rod or universal joint connection matches the existing pump shaft.
- Surface finish – controlled roughness supports proper elastomer contact and reduces premature stator wear.
Quality Control and Inspection
Our manufacturing process for C Series rotors includes three stages of verification:
- Raw material control – incoming stainless steel is checked against material certificates and grade requirements.
- Machining precision – CNC turning and milling operations are monitored for dimensional tolerance and surface finish.
- Finished product inspection – each rotor is measured for critical dimensions, and a test report can be provided with the shipment.
We can supply a material certificate and dimensional inspection report for project documentation.
Configuration and Customization
Standard C Series rotors are available from stock for common pump sizes. For non-standard or worn pump bodies, we offer customization based on your sample or drawing. Provide the following to initiate a custom rotor order:
- Original rotor sample or detailed drawing with all critical dimensions.
- Pump model and serial number if available.
- Required material grade and surface treatment.
- Operating medium, temperature, and solids content.
If a sample is not available, we will request key measurements such as rotor diameter, pitch, length, and drive-end configuration to reverse-engineer the correct geometry.
Installation and Maintenance
C Series rotors are designed for straightforward replacement. Because the dimensions match the original, the rotor slides into the existing stator without adjustment. We recommend the following practices:
- Inspect the stator for wear before installing a new rotor; a worn stator will reduce the service life of the new rotor.
- Lubricate the rotor surface with the pumped medium or a compatible assembly lubricant before insertion.
- Check the coupling rod or universal joint for play and replace if necessary.
- After installation, run the pump briefly at low speed to confirm smooth rotation and no abnormal noise.
For long-term performance, monitor rotor and stator wear together and replace as a matched set when the flow rate drops below the process requirement.
Information We Use to Configure Your Solution
To prepare an accurate quotation and delivery schedule for C Series rotors, we need the following project details:
- Pump model or rotor part number (if known).
- Required material grade and surface treatment.
- Quantity of rotors needed.
- Operating medium, temperature, and solids content.
- Any special dimensional requirements or existing sample availability.
With this information, we confirm dimensional compatibility, recommend the appropriate material, and provide a delivery estimate. Most standard spare parts are in stock and can ship within 3 days; custom rotors typically require 1–2 weeks.
Frequently Asked Questions
Are these rotors genuine OEM parts?
No, we are an independent manufacturer of replacement rotors. Our C Series rotors are engineered to be dimensionally compatible with the original pump and restore its performance, but they are not OEM-branded parts.
What materials are available for C Series rotors?
We offer SS304, SS316/316L, and duplex stainless steel (2205). Surfaces can be left uncoated, chrome-plated, or carbide-coated depending on the abrasiveness and corrosiveness of the pumped medium.
Can you produce a rotor from a sample or drawing?
Yes. Send us your existing rotor sample or a detailed drawing, and we will reverse-engineer the geometry. If no sample is available, we will ask for critical dimensions such as diameter, pitch, length, and drive-end configuration.
Do you provide test reports and material certificates?
Yes. Each rotor is inspected for dimensional accuracy, and we can provide a test report and material certificate with the shipment for project documentation.
What is the typical delivery time for C Series rotors?
Standard spare parts are usually in stock and can be delivered within 3 days. Custom rotors typically take 1–2 weeks depending on the model and required surface treatment.
How do I know if I need a new stator as well?
If the existing stator shows visible wear, cuts, or reduced interference with the rotor, we recommend replacing both components together. A worn stator will accelerate wear on a new rotor and reduce pump efficiency.
Related Products and Categories
Our portfolio also includes NM series progressive cavity pump for applications with different operating ranges, interfaces or integration requirements.
