Vacuum Belt Filter
Reliable coolant filtration at high flow rates
Vacuum belt filters remove fine solid particles from coolants and other process fluids. They are particularly suitable for industrial grinding and machining processes with high requirements for fluid cleanliness, process stability and flow rate. KÖBO ECO>PROCESS configures each fully automatic filter system for the specific medium, required flow rate and filtration fineness.
Fine filtration
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Grinding Processes
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Rolling Bearing Manufacturing
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Coolants
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Continuous operation
Overview
Fine coolant filtration with a vacuum belt filter
Vacuum belt filters are used where a high level of coolant cleanliness is essential, particularly in grinding and machining processes in metalworking. They reliably remove fine solid particles from the fluid and maintain consistently high process quality. This supports longer tool life, high machine availability and high-quality workpiece surfaces.
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Advantages of our vacuum belt filters
Reliable particle separation down to 25 µm
Depending on the configuration, the vacuum belt filter achieves filtration fineness down to 25 µm and reliably removes fine solid particles from the coolant. This supports production processes with tight tolerances, particularly grinding and precision machining.
High flow rates through vacuum filtration
The connected filter and system pumps create negative pressure in the lower chamber. This draws the coolant evenly through the filter medium and increases the flow rate, including with more viscous fluids or higher levels of contamination, while maintaining consistent filtration quality.
Two functions in one system
The vacuum belt filter functions both as a coolant reservoir and as a filtration unit. This reduces the number of external components and saves space in the production environment. Because the filter pumps can also supply the production process, the requirements and costs associated with pump technology and piping are reduced.
Fully automatic continuous operation
The filtration process is sensor-controlled and requires virtually no manual intervention. The system monitors the level of contamination, controls the belt feed and regulates the consumption of filter fleece. This maintains consistent fluid quality during continuous operation.
Automated belt cleaning
An integrated cleaning mechanism with a brush or beater shaft and targeted belt rinsing removes residues from the filter belt. This reduces manual cleaning, maintains filtration performance and extends the service life of the filter belt.
Robust industrial design
Every system component is designed for durability and demanding industrial use, from the belt drive and seals to the control technology. This supports high system availability, low maintenance requirements and a long service life.
Overview
Design of the KÖBO ECO>PROCESS vacuum belt filter
Filter and system pumps connected to the lower suction chamber create negative pressure in the lower chamber and draw the coolant through the fine-pored filter fabric or filter fleece. Solid particles are reliably retained by the filter medium, while the cleaned filtrate is returned to the production circuit. The separated filter cake is discharged intermittently for disposal.
The vacuum belt filter is particularly suitable for manufacturing processes with high fluid-cleanliness requirements, including grinding and machining. The filter medium is automatically advanced when required. During the regeneration phase, a separate regeneration tank maintains the supply of coolant to the production process.
Specifications
Technical specifications of the vacuum belt filter
Filter fineness
25–120
µm
Filter area
2–45
m²
Flow rate
500–20,000
l/min
Sizes
Standard filter areas range from 3 to 24 m². Custom sizes up to 45 m² are available on request. Smaller filter areas ranging from 0.7 to 1.4 m² are available exclusively for operation with filter fleece.
Structure
How the vacuum belt filter works
The contaminated process fluid enters a sealed filter chamber. The connected filter and system pumps create negative pressure beneath the tensioned filter fabric or filter fleece. This vacuum draws the fluid through the filter medium, which reliably retains fine solid particles. The filter cake that forms on the filter medium further increases the filtration effect. A pressure sensor in the lower chamber continuously monitors the filtration process.
When the defined negative pressure is reached, the vacuum is released and the automatic belt feed is activated. The saturated section of the filter medium is discharged from the system and replaced with fresh filter fabric or filter fleece. The dewatered filter cake is discharged in sections and can then be disposed of or recycled. The regeneration process can additionally be triggered at preset time intervals.
Use
Applications of the vacuum belt filter
The vacuum belt filter is designed for industrial processes with high requirements for coolant cleanliness and process reliability. It is particularly suitable for abrasive machining processes, tight production tolerances and applications with high coolant flow rates.
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Grinding processes in rolling bearing and gear manufacturing: Fine particles in the coolant can cause microscopic grinding marks and bearing defects. Reliable filtration helps maintain consistent machining quality and clean process conditions.
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Precision machining in the automotive and aerospace industries: High dimensional accuracy and process reliability are essential when machining safety-critical components. The vacuum belt filter reliably removes fine solid particles from the coolant.
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Precision machining of non-ferrous metals: Aluminium, brass and copper can produce fine chips during machining. The vacuum belt filter reliably separates these particles from the coolant.
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Machine tools with high coolant circulation rates: Large production lines with high fluid circulation benefit from consistent filtration performance, high flow rates and low maintenance requirements.
Benefits
How your operation benefits
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Longer tool life: Lower particle levels in the coolant reduce wear on cutting and grinding tools.
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Fewer unplanned machine downtimes: Clean coolant reduces the risk of deposits and malfunctions in nozzles, sensors, heat exchangers and pumps.
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Longer coolant service life: Continuous filtration extends coolant replacement intervals, reduces operating costs and lowers disposal requirements.
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Consistent machining quality: High fluid cleanliness supports clean workpiece surfaces and helps reduce scrap rates.
Strengths
Your benefits with KÖBO ECO>PROCESS
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Individual solutions: We develop systems that are precisely tailored to your requirements and processes. No off-the-shelf products—just technology that fits your needs perfectly.
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Experience and expertise: Planning, construction, installation, and commissioning—all from a single source, including support from experienced project managers.
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Comprehensive service: Decades of hands-on experience and in-depth technical knowledge result in durable, cost-effective solutions.
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Fast support: In the event of a problem, we’re available, responsive, and efficient. Our goal: to ensure your productivity—without long downtimes.
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