The Alfa Laval G2-40 is a horizontal decanter centrifuge for two-phase solid-liquid separation, rated at 160 GPM with a 4,000 RPM bowl speed and 3,150 G-Force. Dolphin Centrifuge supplies new and rebuilt G2-40 units from Warren, Michigan.
Alfa Laval G2-40 Two-Phase Decanter Centrifuge
The Alfa Laval G2-40 decanter centrifuge is a horizontal de-sludging centrifuge built for the two-phase separation of wastewater, crude oil tank bottoms, municipal sludge thickening, industrial sludge dewatering, paint sludge handling, and similar high-solids applications.
With a 20 HP motor, the G2-40 decanter has a bowl RPM of 4,000 and can process 160 GPM of water with light sludge. The G2 generation design incorporates an optimized scroll geometry for improved solids conveyance and a high-G-force bowl generating 3,150 RCF — significantly greater centrifugal acceleration than previous generation decanters.
G2-40 Specifications
| Model Type | Alfa Laval G2-40 Decanter Centrifuge |
| Rated Capacity | 160 GPM on Water Sludge Thickening |
| Auger Differential Speed | 1 ~ 140 RPM |
| Drive Motor Power | 20 HP |
| GearBox Ratio | 1:52 (3.5 kN-M) DD Gearbox |
| AE (Area Equivalent) | 1,565 |
| Bowl Speed | 4,000 RPM |
| G-Force | 3,150 RCF |
| Conveyor Protection | Carbide Tile or Tungsten Carbide Hard-Surfacing |
Key Features
- 3,150 G-Force bowl: High centrifugal acceleration at 4,000 RPM enables effective separation of difficult-to-separate phases and finer particles that lower G-force machines cannot capture.
- 160 GPM rated capacity: Handles high-volume wastewater and sludge thickening applications with a 20 HP drive motor and energy-efficient VFD system.
- Optimized G2 scroll geometry: The second-generation scroll design improves solids conveyance efficiency, reducing scroll wear and improving cake dryness at a given differential speed.
- Tungsten carbide conveyor protection: Carbide tile or tungsten carbide hard-surfacing on the scroll flights extends service life in abrasive applications.
Applications
The Alfa Laval G2-40 decanter is used for the following applications:
- Ethanol extraction
- Pyrolysis sludge separation
- Sludge thickening and dewatering
- Paint sludge handling
Get a Quote for the Alfa Laval G2-40 Decanter
Dolphin Centrifuge supplies new and reconditioned G2-40 decanter centrifuges with full warranty. Contact our engineering team for application review and pricing.
Frequently Asked Questions
What separations can the G2-40 decanter centrifuge handle?
The G2-40 is a high-performance horizontal scroll decanter designed for demanding two-phase (solid-liquid) separation. It handles wastewater, crude oil tank bottom sludge, municipal sludge thickening, industrial sludge dewatering, paint sludge, pyrolysis sludge, and liquid humus fertilizer applications. With 3,150 G-Force and 160 GPM rated capacity, it is suited for high-solids processing.
How does the G2-40 compare to the NX-314 and NX-418 decanters?
The G2-40 is Alfa Laval's larger and higher-throughput decanter platform compared to the NX-314 and NX-418. With a 20 HP drive motor and 4,000 RPM bowl speed, the G2-40 delivers 160 GPM rated capacity for high-volume or high-solids applications. The NX-314 and NX-418 are well-suited for moderate-volume applications. Contact Dolphin Centrifuge to match the right model to your specific throughput and solids loading requirements.
Does Dolphin Centrifuge sell new or remanufactured G2-40 decanters?
Dolphin Centrifuge supplies both new and factory-rebuilt G2-40 decanter centrifuges. Rebuilt units are fully disassembled, inspected, worn components replaced, and reassembled to original specifications with a Dolphin warranty. Contact us for current availability and pricing.
What is the G2-40's gearbox ratio and why does it matter?
The Alfa Laval G2-40 uses a 1:52 DD (Direct Drive) gearbox with a torque rating of 3.5 kN-M. This ratio enables the auger differential speed range of 1–140 RPM — much wider than the NX-314 and NX-418's 1:159 ratio. The wider differential speed range gives operators greater flexibility to optimize cake dryness and throughput across different feed slurries and solids loadings.
How do I contact Dolphin Centrifuge about the G2-40 decanter?
Contact Dolphin Centrifuge at (248) 522-2573 or email sales@dolphincentrifuge.com. Our engineering team can review your application requirements, recommend the right decanter model, and provide a quote for a new or reconditioned G2-40 unit. You can also submit a request through our contact page at /contact-for-alfa-laval-centrifuges/.
Alfa Laval G2-40 Decanter — High-Capacity Industrial Separation
Dolphin Centrifuge supplies and services the G2-40 decanter for wastewater, oil, and sludge applications. Sample testing available.