ALLWEILER Single Screw Pump 

ALLWEILER single screw pumps (also known as eccentric screw pumps or progressing cavity pumps) are one of the core product lines of the German company ALLWEILER. Founded in 1860, ALLWEILER is Germany's oldest pump manufacturer and one of the world's top ten industrial pump manufacturers. Its single screw pumps are renowned for their smooth, pulsation-free delivery, low wear, and long service life, and are widely used in petrochemical, wastewater treatment, food processing, papermaking, and metallurgical industries.

The core working principle of a single screw pump is that a metal rotor rotates eccentrically within an elastic stator (usually made 

of rubber), forming a continuous sealed cavity that smoothly pushes the medium from the inlet to the outlet. This structure allows

 it to easily handle high-viscosity media, media containing solid particles, or fibrous materials, making it particularly suitable for 

complex operating conditions where other pump types struggle.

Brand Positioning: ALLWEILER single screw pumps, with their modular design and extensive range of options, cover a wide range

 of needs, from metering dosing to large-scale industrial transport. Combined with ALLWEILER's proprietary ALLDUR® stator 

technology, service life can be extended by up to 500%, offering significant advantages in long-term operating costs.

ALLWEILER Single Screw Pump  Core technical advantages

1. Smooth and pulsation-free transportation

The unique spiral structure design of the single-screw pump can realize continuous, smooth and pulsation-free transportation of

 media, ranging from low-viscosity liquids to high-viscosity materials. This feature makes it especially suitable for processes that 

require high flow stability, such as metering and dosing, food filling, etc.

2. Excellent media adaptability

ALLWEILER single screw pumps are the "universal solution" for cross-scenario applications and can handle almost all fluids at 

pressures up to 48 bar, even fibrous and solid particulate materials. Media types that can be processed include:

High viscosity fluids (up to 1,000,000 mPa·s)

Media containing solid particles or fibers (solids content up to 60%)

Highly abrasive media (with ALLDUR® stator)

Neutral or corrosive media

3. Modular design, universal spare parts

ALLWEILER single screw pump adopts modular design, which can significantly reduce users' spare parts inventory and reduce 

operation and maintenance costs. It also provides two driving installation methods, bearing frame type and direct-coupled type, 

and can choose various driving methods such as gear reduction motor, mechanical stepless speed regulation motor or variable 

frequency speed regulation.

4. ALLDUR® stator technology – life extended by 500%

ALLWEILER's self-developed ALLDUR® stator is one of the core competitive advantages of its single screw pumps:

Technical characteristics Description

Service life can be extended by up to 500% compared to traditional stators

Wear resistance Excellent wear resistance, especially suitable for highly abrasive media

Honeycomb structure Innovative honeycomb surface design reduces hydrodynamic resistance and improves efficiency

Temperature range -30 °C to +100 °C

Reduced internal friction: Compared with traditional solutions, internal friction is reduced by up to 500%, optimizing starting and 

running torque.

ALLDUR® stators pump media safely and cost-effectively over a wide temperature range and can continue to be used even if 

partially damaged without further damage.

5. OPTIFIX™ Rapid Maintenance System

The OPTIFIX™ series is a single screw pump designed by ALLWEILER for efficient maintenance and has the following outstanding

 advantages:

Maintenance time is only 1/3 of traditional pumps: the patented zero-clearance short-axis connection and high-quality universal 

joint design greatly shorten the time required to maintain, repair or upgrade the pump body.

Replacement of the stator and rotor without dismantling the pipes: Special disassembly tools allow core components to be replaced

 without dismantling the inlet and outlet pipes, achieving the best mean time to repair (MTTR) among similar products

Spare parts preparation time reduced by 60%: Ready-to-use replacement kits further speed up maintenance processes

No risk of contamination: Optimized sealing technology effectively prevents leakage and completely eliminates the risk of 

contamination during disassembly and assembly.

6. Energy and maintenance cost savings

The ALL-OPTIFLOW® series can achieve energy cost savings of up to 15% and maintenance cost savings of up to 15% under

 the same working conditions through optimized hydraulic design.

ALLWEILER Single Screw Pump  Product Overview

ALLWEILER single screw pumps offer a complete product matrix, ranging from general-purpose for process industries to 

metering and dosing pumps and food hygiene pumps:

Category | Series Code | Maximum Flow Rate (L/min) | Maximum Pressure (bar) | Maximum Viscosity (mPa·s) | Main Applications

Basic Series | AE.-ID | 7,500 | 48 | 300,000 | General-purpose for process industries

Direct-drive type | AEB.E-IE | 2,900 | 6 | 300,000 | Compact installation scenarios

Direct-drive type (medium pressure) | AEB.N-IE | 1,850 | 12 | 270,000 | Medium pressure applications

2/3 structure | AED.E-ID | 12,000 | 8 | 250,000 | High flow rate delivery

OPTIFIX™ Quick Maintenance | AEB-MF | 1,600 | 10 | 190,000 | Scenarios requiring rapid repair

Wastewater treatment | TECFLOW | 3,100 4 200,000 Municipal/Industrial Wastewater Treatment

Viscous Material Conveying SEZP / SNZP 250 / 750 10 / 12 1,000,000 High Viscosity Materials

High Viscosity Materials AE.N..-RG 500 20 1,000,000 Ultra-High Viscosity Media

Vertical Pump SETP / SETBP 2,350 / 670 10 300,000 Submersible Installation/Tank Suction

Metering Pump ANP / ANBP / ADP 10 ~ 42 12 20,000 Precision Metering

Food Hygiene Pump ASP / ASBP / SSP 42 ~ 800 12 150,000 Food/Pharmaceutical Industry

3-A Food Hygiene Pump ACNP / ACNBP 480 12 150,000 3-A Certified Food-Grade Applications

Drum Pump AFP 47 6 50,000 Drum Material Extraction

Auxiliary Circulation Pump SMP / SMP2 92 ~ 670 6 150,000 Circulation Auxiliary Conveying

Note: The above are typical parameter ranges for each series. Specific performance data depends on the actual configuration.

 More detailed performance parameters can be found in the product technical manual.

ALLWEILER Single Screw Pump Core Application Areas

ALLWEILER single screw pumps are widely used in the following industries and scenarios:

Application Areas Typical Scenarios

Petrochemical Industry: Crude oil transportation, chemical raw material transportation, refining process media

Wastewater Treatment: Sludge transportation, flocculant dosing, municipal/industrial wastewater treatment (TECFLOW series)

Food Industry: Food slurry transportation, condiment metering, sanitary fluid transportation (ASP/SSP/ACNP series)

Pharmaceutical Industry: Pharmaceutical liquid transportation, raw material metering, aseptic process (3-A certified series)

Paper/Metallurgy: Pulp transportation, high solids content slurry transportation

Power Plant/Energy: Limestone slurry transportation, desulfurization process

Chemical Processes: High viscosity material transportation, corrosive media transportation, metering dosing

Environmental Engineering: Sludge dewatering feed, chemical dosing, solids content media transportation

General Industry: Coolant and lubricant transportation, drummed material extraction (AFP series)

ALLWEILER Single Screw Pump Product Advantages Summary

Advantages Explanation

✅ German Quality: Founded in 1860, Germany's oldest pump manufacturer and one of the world's top ten industrial pump brands.

✅ Smooth and Puls-Free: Unique spiral structure ensures continuous and smooth delivery without shearing the medium.

✅ Strong Media Adaptability: Handles high-viscosity (1 million mPa·s), solids-containing (60%), and abrasive media.

✅ ALLDUR® Stator Technology: Extends service life by up to 500%, significantly reducing operating costs.

✅ OPTIFIX™ Quick Maintenance: Maintenance time is only 1/3 that of traditional pumps; core components can be replaced without 

disassembling pipelines.

✅ Energy Efficient: The ALL-OPTIFLOW® series can save up to 15% on energy costs.

✅ Modular Design: High spare parts versatility, significantly reducing spare parts inventory.

✅ Complete Series: Covers a wide range of applications from general conveying and sewage/sludge applications to food and 

pharmaceutical manufacturing, and metering/dosing.