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Sludge Dewatering Filter Bag 1.25 m³ – F-BAG XXL (Gravity Filter Bag)
Mobile Sludge Dewatering for High Flow Rates
The WINKLER sludge dewatering filter bag F-BAG XXL (1.25 m³) is a high-performance solution for reliable solid-liquid separation in industrial wastewater treatment. Designed as a gravity filter bag, it operates without electricity, pumps or maintenance-intensive systems – ideal for companies looking to dewater large sludge volumes quickly and cost-effectively.
The F-BAG XXL is engineered for demanding industrial B2B applications. Durable filter media, reinforced lifting loops and excellent drainage performance help maintain stable processes while protecting downstream systems from clogging and sediment buildup.
Typical Applications
This filter bag is particularly suitable for applications where sludge must be dewatered directly on-site – mobile, efficient and easy to use:
- Vehicle wash systems (cars, commercial vehicles, train and ICE wash facilities)
- Concrete processing and concrete plants (sawing slurry, grinding water, drilling and flushing water)
- Recycling facilities (construction waste, metal processing, plastics and process water treatment)
- Industrial wastewater treatment and production processes (pre-filtration and sludge separation)
Wherever extremely high sludge volumes occur, this filter bag is trusted across leading industries. Typical sectors include raw material processing in the chemical industry, large-scale infrastructure projects in civil engineering and landscaping, and demanding applications within transportation and logistics. The F-BAG XXL is also widely used in the construction industry, agriculture, and industrial water clarification systems for environmental and energy applications.
How Gravity Filtration Works
The sludge dewatering process is intentionally simple and suitable for both fixed and changing operating locations:
- The contaminated sludge water mixture is pumped or directed into the filter bag.
- Solid particles are retained inside the filter media while water drains in a controlled manner.
- After dewatering, the bag can be removed and the sludge disposed of properly.
Thanks to its large usable volume of 1.25 m³ and extensive filtration surface area, the F-BAG XXL is ideal for large sludge batches and continuous industrial sludge dewatering processes.
Your Benefits in Industrial Applications
The F-BAG XXL combines high capacity with industrial-grade durability, making it a reliable solution for predictable and efficient sludge dewatering – even under demanding operating conditions.
- High Capacity: 1.25 m³ usable volume for large flow rates and sludge quantities.
- Industrial Quality: Robust construction for abrasive and demanding sludge applications.
- Chemically Resistant: Suitable for many acidic and alkaline industrial process waters.
- Efficient Dewatering: High water permeability for shorter process times.
- Safe Handling: Reinforced lifting straps with 280 mm extension for easy transport and recovery.
Which Filter Bag Is Right? F-BAG Series Size Comparison
The correct filter bag size mainly depends on sludge volume, batch size and installation conditions. The following overview helps identify the most suitable F-BAG model for your application:
| Model | Usable Volume | Application Range | Typical Use |
| F-BAG M | 0.125 m³ | Small batches, highly mobile | Short-term operations, maintenance work and small sludge quantities in confined spaces. |
| F-BAG L | 0.5 m³ | Medium flow rates | Regular sludge dewatering in workshops and industrial facilities. |
| F-BAG XL | 0.8 m³ | Large batches | Applications with higher sludge volumes and extended dewatering intervals. |
| F-BAG XXL | 1.25 m³ | Industrial applications | Maximum capacity for large flow rates and heavy industrial sludge. |
| F-BAG Custom Size (GE Vernova) | Custom dimensions | Special installation situations | Custom-fit filter bags for shafts and special containers with limited installation height. |
In addition to standard sizes, custom-made filter bags are also available. These solutions are ideal for existing systems and special installation situations where standard dimensions are not suitable.
WINKLER F-BAG XXL Filter Bag: Technical Specifications
| Material | Polypropylene needle felt |
| Usable Volume | 1.25 m³ |
| Dimensions | Height: 1.00 m |
| Base Area | 1.00 × 1.25 m |
| Lifting Straps | 280 mm extension |
| Load Capacity | 400 kg / 600 kg / 900 kg |
| Filtration Rating | Nominal 100 µm, acid and alkali resistant |
| Water Permeability | 135 l s-1 m-2 at 100 mm water column |
| Delivery Time | 1–2 business days |
Consulting from Filtration Specialists
Planning an industrial-scale sludge dewatering system with the F-BAG XXL? Our filtration experts will support you in selecting the ideal solution for reliable and cost-efficient solid-liquid separation – even under maximum load conditions.
FAQ – Filter bag 1.25 m³ for industrial sludge dewatering
Frequently asked questions about sludge dewatering with filter bags for large volume flows
The 1.25 m³ filter bag is designed for applications requiring reliable and economical dewatering of large quantities of sludge. Its large usable volume and extensive filter surface make it particularly suitable for industrial applications with continuous sludge flow. Here you will find answers to frequently asked questions about the use of large-volume gravity filter bags.
For which applications is a 1.25 m³ filter bag particularly suitable?
This size is often used when smaller filter bags would need to be changed too frequently or when larger batches need to be dewatered.
What are the advantages of a large-volume filter bag?
Thanks to the large filter surface area, the water flow remains stable even with larger amounts of sludge.
Can the filter bag be filled continuously?
Filling can be done, for example, from collection containers, troughs or pump systems.
How do you safely remove a filled filter bag?
After extraction, the dewatered sludge can be disposed of properly.
When is a filter bag with a usable volume of 1.25 m³ worthwhile?
This size is therefore particularly suitable for industrial plants that require reliable and economical sludge dewatering.
