Progressive Cavity Pump Parts
OEM-compatible progressive cavity pump replacement parts engineered for demanding industrial service, including rotors, stators, connecting rods, drive shafts, universal joints, mechanical seals, bearings and repair kits.
ACCA Pumps supports maintenance, repair and overhaul of widely used progressive cavity pump platforms for wastewater, chemical, mining, food, pulp and paper, and oil and gas applications.
Progressive Cavity Pump Parts for Industrial Applications
Progressive cavity pumps operate through the controlled interaction of a metallic rotor, an elastomer stator and an articulated drive train. As these components operate under continuous mechanical loading, normal service eventually produces wear that can reduce flow, increase internal slip, raise starting torque or affect sealing performance.
Selecting the correct progressive cavity pump replacement parts requires more than matching a general description. Pump model, component geometry, fluid chemistry, solids concentration, differential pressure, speed and temperature all affect fit and material selection. Rotor and stator condition should be evaluated together because the sealing relationship between those two components directly influences volumetric efficiency and pressure capability.
ACCA Pumps supplies aftermarket components engineered for compatibility with many widely used pump platforms. For replacement components across ACCA’s broader product range, visit the industrial pump parts and replacement components hub. Available parts include rotors, stators, connecting rods, drive shafts, universal joints, seals, bearing components and repair kits. When records are incomplete or equipment is obsolete, ACCA can review drawings, dimensions, photographs and worn samples to support identification and reverse engineering.
On This Page
Understanding Progressive Cavity Pump Components
Progressive cavity pumps rely on a compact group of precision-engineered components working as one mechanical system. The rotor, stator and drive train determine flow, pressure capability, starting torque and service life, while the sealing and bearing arrangements support reliable operation.
Engineering Note
Maintenance decisions should consider adjacent components together. A new stator installed over a heavily worn rotor may not restore the original sealing geometry or volumetric efficiency.
How Progressive Cavity Pumps Work
Torque travels through the drive train to the rotor. As the rotor turns eccentrically inside the stator, sealed cavities form and progress from suction to discharge, moving fluid at a nearly constant rate.
Progressive Cavity Pump Components and Their Functions
Rotor
Forms progressing cavities with the stator. Inspect for scoring, pitting, corrosion and coating loss.
Stator
Provides the elastomer sealing geometry. Inspect for swelling, cracking, chunking and chemical attack.
Connecting Rod
Transmits torque through the articulated drive train. Inspect for wear, bending and joint damage.
Universal Joint
Accommodates eccentric rotor motion. Inspect pins, bushings, seals and lubrication condition.
Drive Shaft
Transfers torque from the bearing housing and drive. Inspect splines, keyways, journals and seal surfaces.
Mechanical Seals
Control leakage at the rotating shaft. Select around pressure, fluid chemistry, solids and operating temperature.
Bearings
Support the rotating assembly and maintain alignment. Inspect for heat, vibration, looseness and contamination.
Rotor-and-Stator Sets
Matched pumping elements help restore predictable sealing geometry, flow and pressure capability.
Repair Kits
Group frequently replaced components for planned maintenance, rebuilds and emergency repairs.
Material Selection for Progressive Cavity Pump Parts
| Component | Common Options | Selection Considerations |
|---|---|---|
| Rotor | Hardened alloy steel, stainless steel, chrome-plated finishes | Abrasion, corrosion, fluid chemistry, pressure and expected service life |
| Stator | NBR, HNBR, EPDM, FKM, natural rubber | Chemical compatibility, temperature, swelling, abrasion and cleaning fluids |
| Drive Components | Carbon steel, stainless steel, coated or hardened surfaces | Torque, corrosion, wear, lubrication and joint configuration |
| Seals | Carbon, silicon carbide, tungsten carbide, elastomer options | Pressure, solids, temperature, lubrication and leakage requirements |
Common Causes of Component Wear
Dry Running
Loss of lubrication can rapidly overheat and damage the stator elastomer.
Abrasive Solids
Particles can accelerate rotor coating loss and stator wear.
Chemical Incompatibility
Incorrect elastomer selection can cause swelling, softening or cracking.
Excessive Pressure
Operating above the intended differential pressure increases slip, torque and wear.
Improper Speed
Excessive speed increases friction, heat and abrasive wear.
Misalignment
Poor alignment can overload joints, bearings, shafts and seals.
OEM-Compatible Pump Parts by Manufacturer
ACCA supplies rotors, stators, drive components, seals and repair parts engineered for compatibility with many established progressive cavity pump platforms.
Moyno® Pump Parts
- 2000 Series
- 1000 Series
- L-Frame
- J-Frame open-throat pumps & parts
- 500 Series
NETZSCH® Pump Parts
- Rotors and stators
- Drive components
- Seals
- Repair parts
Seepex® Pump Parts
- Rotors and stators
- Connecting rods
- Drive shafts
- Seal components
Allweiler® Pump Parts
- Rotors and stators
- Drive components
- Sealing parts
- Repair components
Tarby® Pump Parts
- Century III
- Century IV
- Century V
- Wear components
For legacy Monoflo equipment, see Monoflo pump parts and identification support.
Roper® Pump Parts
- 70000 Series
- Rotors and stators
- Drive components
- Repair parts
Progressive Cavity Pump Applications by Industry
Explore existing ACCA Pumps industry resources covering common progressive cavity pump applications and the fluids encountered in each operating environment.
Wastewater Treatment
- Sludge transfer
- WAS and RAS
- Polymer feed
- Dewatering feed
Oil, Gas and Fracking
- Drilling mud
- Produced water
- Frac chemicals
- Waste-fluid transfer
Mining and Minerals
- Tailings
- Mineral slurries
- Reagent dosing
- Mine dewatering
Chemical Processing
- Polymers and resins
- Adhesives
- Corrosive fluids
- Chemical dosing
Food and Beverage
- Syrups and honey
- Chocolate and sauces
- Fruit concentrates
- Spent grain
Pulp and Paper
- Paper stock
- Black liquor
- Coatings and starch
- Mill wastewater
Engineering and Reverse Engineering Services
ACCA supports difficult-to-source, obsolete and unidentified progressive cavity pump components through application review and dimensional evaluation.
Reverse Engineering
Evaluation of worn samples, drawings and dimensional information to reproduce replacement components.
OEM Cross-Reference
Review of manufacturer, model, serial number and existing part-number data for component identification.
Material Selection
Material review based on abrasion, corrosion, temperature, chemistry and mechanical loading.
Elastomer Review
Stator elastomer recommendations based on fluid compatibility, temperature and swelling risk.
Rotor Coating Review
Assessment of wear and corrosion conditions when selecting rotor materials and surface treatments.
Dimensional Inspection
Dimensional comparison and fit review using drawings, measurements or supplied sample components.
Selecting the Correct Replacement Parts
| Information Needed | Why It Matters |
|---|---|
| Manufacturer, model and serial number | Confirms the applicable pump platform and component geometry. |
| OEM or existing part number | Helps identify the original component and configuration. |
| Fluid and solids information | Supports material, elastomer and wear-surface selection. |
| Pressure, speed and temperature | Defines mechanical and thermal loading. |
| Photos, drawings or sample parts | Supports identification and reverse engineering when records are incomplete. |
Frequently Asked Questions
How do I identify the correct progressive cavity pump part?
Provide the manufacturer, pump model, serial number, existing part number and any available photographs or drawings. Operating conditions are also useful when material selection must be reviewed.
Should the rotor and stator be replaced together?
Not always, but both should be inspected together. A worn mating component can reduce the benefit of replacing only one part and may prevent restoration of the original sealing geometry.
What causes a stator to swell?
Swelling is commonly associated with chemical incompatibility, temperature or exposure to process and cleaning fluids that are unsuitable for the elastomer.
What causes premature rotor or stator wear?
Common causes include dry running, abrasive solids, excessive speed, high differential pressure, restricted suction, chemical incompatibility and misalignment.
Can ACCA identify an obsolete component?
Yes. Nameplate data, drawings, dimensions, photographs or a worn sample can be used for identification and reverse-engineering review.
Does ACCA supply complete repair kits?
Repair kits and grouped replacement components can be supplied for many common pump platforms, subject to model and configuration verification.
Can ACCA recommend a stator elastomer?
ACCA can review fluid chemistry, temperature, solids, cleaning agents and previous service history to help determine suitable elastomer options.
Can parts be identified from photographs?
Photographs can help, particularly when they include the pump nameplate and dimensional references. Some components may still require drawings, measurements or a physical sample.
Does ACCA ship progressive cavity pump parts internationally?
Yes. ACCA supports domestic and international customers, subject to the destination, product availability and applicable shipping requirements.
What information is required for a quotation?
Provide the manufacturer, model, serial number, part number, quantity, fluid, temperature, pressure, speed and available photographs or drawings.
Moyno Part Number Cross-Reference
Already have a Moyno® part number? Use our Moyno Pump Parts Cross-Reference as another route to identify compatible ACCA replacement components, then contact us to confirm fitment for your pump and service conditions.
Need Help Identifying a Progressive Cavity Pump Part?
Send your nameplate, existing part number, drawing, dimensions or photographs. ACCA will review the information and help identify a suitable replacement.
Pump nameplate
Existing part number
Photos or drawings
Operating conditions
Part identification
Compatibility review
Material recommendations
Formal quotation
Trademark Disclaimer: References to manufacturer names are used solely to identify compatible equipment. ACCA Pumps is an independent aftermarket manufacturer and is not affiliated with or endorsed by those companies. Read the full disclaimer.