Progressive Cavity Pumps
ACCA progressive cavity pumps provide controlled, low-shear flow for viscous, abrasive, solids-laden and shear-sensitive fluids across demanding industrial and municipal applications.
From new installations to replacement applications, ACCA helps match pump geometry, materials, elastomers, speed and drive configuration to the actual process conditions. For other pump technologies and complete equipment options, explore ACCA industrial pumps and pump solutions.
Progressive Cavity Pumps for Difficult Fluids
A progressive cavity pump is a rotary positive-displacement pump that moves fluid through sealed cavities formed between a helical rotor and an elastomeric stator. Because each cavity progresses smoothly from suction to discharge, capacity is predictable and approximately proportional to pump speed.
That operating principle makes progressive cavity pumps particularly useful when centrifugal pumps struggle with viscosity, entrained solids, shear sensitivity, suction conditions or the need for controlled flow. ACCA supplies complete pump solutions for transfer, metering, sludge handling, process feed and other demanding duties.
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How a Progressive Cavity Pump Works
The drive turns a single-helical rotor eccentrically inside a double-helical stator. Their geometry creates a sequence of sealed cavities. As the rotor turns, those cavities advance axially through the pump, carrying fluid from the suction side to the discharge side without requiring high velocity.
1. Fluid Enters
Fluid enters the suction housing and fills the open cavities formed by the rotor and stator.
2. Cavities Progress
Rotor motion advances the sealed cavities continuously along the pumping element.
3. Controlled Discharge
Fluid exits at a steady rate, with capacity governed primarily by displacement and rotational speed.
Engineering Principle
Progressive cavity pumps are positive-displacement machines. System pressure affects required torque and power, while pump speed has a direct relationship to theoretical capacity. Actual performance also depends on fluid viscosity, differential pressure, rotor/stator fit and internal slip.
Why Choose a Progressive Cavity Pump?
Viscous Fluids
Suitable for oils, polymers, syrups, sludge, pastes and other fluids that become difficult for many dynamic pumps.
Solids Handling
Can transfer many solids-laden streams when pump size, speed, geometry and materials are selected correctly.
Low Shear
Gentle progressing-cavity action helps protect shear-sensitive products and process characteristics.
Predictable Flow
Positive displacement provides repeatable capacity over a useful pressure range and supports speed-based flow control.
Suction Capability
Useful in applications where fluid does not readily flow into the pump, subject to NPSH and inlet-system design.
Metering & Dosing
Variable-speed operation makes the technology useful for controlled chemical, polymer and additive feed.
ACCA Progressive Cavity Pump Families
ACCA manufactures complete progressive cavity pumps for new and replacement installations. Our existing replacement platform includes pump families designed around widely installed Moyno® configurations, allowing users to evaluate ACCA equipment while retaining familiar process connections and operating requirements where applicable.
A-Series
ACCA complete pump configurations for applications corresponding to widely installed Moyno® 2000 Series pump sizes.
AL-Series
Pin-joint progressive cavity pump configurations corresponding to common L-Frame applications, including industrial and drilling duties.
A500 Series
Compact progressive cavity pump solutions for applications corresponding to selected Moyno® 500 Series installations.
Moyno® is a registered trademark of its respective owner. References are used solely to identify equipment compatibility. ACCA Pumps is an independent manufacturer and is not affiliated with or endorsed by Moyno.
Progressive Cavity Pump Applications & Industries
Pump selection changes significantly with the fluid and process. ACCA has application resources organized around the industries where progressive cavity technology is commonly used.
Wastewater Treatment
Sludge transfer, WAS/TWAS, digester sludge, dewatering feed, polymer feed and lime slurry.
Oil & Gas
Produced water, crude oil, tank bottoms, oily sludge, multiphase transfer and chemical/additive feed.
Pulp & Paper
Paper stock, pulp slurry, coating color, starch, black liquor and process liquors.
Mining
Tailings, thickener underflow, abrasive mineral slurry, flotation reagents and process chemicals.
Food & Beverage
Sauces, pastes, purees, syrups, molasses, brewery streams and other shear-sensitive products.
Chemical Processing
Adhesives, resins, polymers, paints, coatings, chemical slurries, metering and dosing.
Drilling & Geothermal
Drilling mud, bentonite, geothermal fluids and 3L4/3L6/3L8/3L10-style drilling applications.
Power Generation
FGD slurry, wastewater sludge and controlled chemical-feed applications.
More Industries
Agriculture, marine, cement, lime and other difficult-fluid applications.
How to Select a Progressive Cavity Pump
Reliable selection starts with the process conditions. A pump that is correct for clean oil may be unsuitable for abrasive sludge even at the same flow and pressure.
| Selection Data | Why It Matters |
|---|---|
| Required flow rate | Establishes pump displacement and operating speed. |
| Differential pressure | Determines stage requirement, torque and power demand. |
| Viscosity and specific gravity | Affect suction conditions, friction losses, power and speed selection. |
| Solids size and concentration | Influence pump geometry, inlet design, speed and wear rate. |
| Fluid chemistry and temperature | Drive stator elastomer, rotor, seal and wetted-material selection. |
| Suction conditions / NPSH | Determine whether the pump can fill cavities reliably without starvation. |
| Duty cycle and control method | Influence motor, gearbox, VFD and service-factor selection. |
Send ACCA Your Application Data
For pump selection, provide flow, discharge pressure, suction conditions, fluid description, viscosity, specific gravity, temperature, solids information, materials requirements, electrical supply and expected operating schedule.
Rotor, Stator and Wetted Material Selection
Rotor Materials
Material and surface treatment are selected around abrasion, corrosion, pressure and expected service life. Options vary by pump size and application.
Stator Elastomers
NBR, HNBR, EPDM, FKM and other compounds may be considered depending on chemical compatibility, temperature, swelling and abrasion.
Seals & Wetted Parts
Mechanical seal faces, elastomers, housings and shafts must be compatible with the process fluid, solids, pressure and cleaning regime.
Drop-In and Replacement Progressive Cavity Pumps
When replacing an installed pump, the objective is often to reduce piping, baseplate and drive modifications. ACCA can review existing manufacturer/model information, dimensions, flange locations, performance requirements and operating conditions to determine whether an ACCA configuration can be used as a practical replacement.
Replacement evaluation should confirm more than dimensional fit. Capacity per revolution, pressure capability, speed, torque, materials, seal arrangement and motor/gearbox requirements must also suit the duty.
Progressive Cavity Pump Parts & Service Support
ACCA also supports installed pumps with rotors, stators, drive components, seals, bearings and repair components. The parts section is maintained separately so users looking for maintenance components can move directly into manufacturer, series and model-level resources.
Progressive Cavity Pump FAQs
What fluids are progressive cavity pumps best suited for?
They are commonly selected for viscous, abrasive, solids-laden and shear-sensitive fluids, as well as applications requiring controlled positive-displacement flow. Final suitability depends on the complete operating conditions.
Is progressive cavity pump flow proportional to speed?
Theoretical displacement is proportional to rotational speed. Actual capacity can be lower because of internal slip, particularly as differential pressure, wear and fluid properties change.
Can a progressive cavity pump run dry?
Standard elastomer-stator progressive cavity pumps generally should not be allowed to run dry because the pumped fluid helps lubricate and cool the rotor/stator interface. Dry-running protection is recommended where loss of feed is possible.
Can progressive cavity pumps handle solids?
Yes, many configurations can handle solids-laden fluids. Allowable particle size and concentration depend on pump geometry, inlet design, speed, elastomer, abrasiveness and the nature of the solids.
How is flow controlled?
Flow is commonly controlled by changing pump speed, often with a variable-frequency drive. The selected operating range must remain within the pump, gearbox and motor limits.
What information does ACCA need to size a pump?
Provide flow, differential pressure, fluid description, viscosity, specific gravity, temperature, solids, suction conditions, materials requirements, electrical supply and duty cycle.
Can ACCA replace an existing progressive cavity pump?
ACCA can review the existing pump model, dimensions, connections, performance and application data to evaluate a replacement configuration and identify any changes that may be required.
Does ACCA also supply replacement parts?
Yes. ACCA supplies progressive cavity pump rotors, stators, drive components, seals, bearings and other replacement components for numerous installed pump platforms.
Need a Progressive Cavity Pump for Your Application?
Send us the operating conditions or the existing pump nameplate. ACCA can review the duty and help identify a suitable pump configuration.
Flow and pressure
Fluid and viscosity
Temperature and solids
Existing pump information
Pump size and speed
Materials and elastomer
Drive requirements
Replacement compatibility
Trademark Disclaimer: References to manufacturer names are used solely to identify compatible equipment. ACCA Pumps is an independent manufacturer and is not affiliated with or endorsed by those companies. Read the full disclaimer.