Filter belts

A filter belt is a continuous loop of permeable fabric used in various filtration systems such as horizontal vacuum belt filters, rotary filters, and tower presses. Its primary function is twofold: transport and separation. As the slurry moves along the belt, the fabric retains solids to form a cake while allowing liquid filtrate to pass through efficiently.

For industries ranging from mineral processing to food manufacturing, the performance of this belt determines:

• Operational continuity: Preventing downtime caused by belt mistracking or breakage.
• Separation efficiency: Ensuring clear filtrate and dry cake.
• Production speed: Handling high volumes of slurry without clogging or slowing down.

Markert designs these belts to handle specific mechanical stresses and chemical environments, ensuring your filtration process remains smooth and cost-effective.

Not all conveyor filtration media can handle the strain of modern industry. Markert filter belts are manufactured to fit a wide range of systems, including double-belt presses and rotary drum filters. We offer seamless belts in widths up to 4.5 meters, making our solutions scalable for even the largest operations.

Our innovative designs leverage decades of experience to deliver specific technical advantages tailored to your unique process conditions.

1. Superior Dimensional Stability

A stretching belt causes tracking issues and uneven filtration. Our belts, particularly those for tower presses, are pre-stretched during manufacturing. This minimizes shrinking and stretching during operation, ensuring reliable straight running and reducing the need for constant tension adjustments.

2. Specialized Seam Technologies

The weak point of any belt is often the connection. Markert mitigates this with advanced seam options:

• Clipper Seam with Overlap: Features a zipper protected by a sewn-in overlap to prevent particle loss and protect the connection.
• Seamless Overlap: Allows for a smooth transition at the scraper, which is critical for effective cake discharge.
• Coated Clipper Seam: Integrated protection to prevent particle loss in sensitive applications.

3. Optimized Dewatering Zones

Trapped moisture creates waste. Our designs, such as the filter belt with an overlap and dewatering zone, prevent solid material from collecting between fabric layers. This ensures better hygiene and more efficient drying of the filter cake.

4. Robust Edge Reinforcement

Fraying edges lead to rapid failure. Markert offers filter belts with reinforced side edges that promote straight running and significantly extend the service life of the belt by preventing edge damage.

5. Corrosion Resistance

For food and chemical applications where metal contamination or corrosion is a concern, we offer belts with flexible plastic pintle wires. Unlike steel wires, these plastic alternatives are corrosion-resistant and cannot snap, ensuring easy assembly and safe operation.

IIndustrial environments are unforgiving. A standard fabric belt will likely degrade when exposed to acidic slurries or high mechanical tension.

Markert filter belts deliver exceptional chemical resistance and mechanical strength. For example, our belts for phosphoric acid filtration (such as the DID 11137 fabric) are specifically engineered to optimize process sequences in phosphogypsum filtration. They withstand aggressive chemical attacks while maintaining structural integrity.

We provide a comprehensive range of air permeability options and materials tailored to your specific needs. Whether you require a double-layer fabric for fold-free operation or a belt with a rubber mushroom profile for rotary drum filters, our specialists ensure the material matches the application perfectly.

Our filter belt solutions are versatile and trusted globally. They are ideal for a variety of continuous filtration processes, specifically the preparation and dewatering of:

Food and Beverage: Meeting strict hygiene standards for consumables, supported by easy-to-clean designs.

Mineral & Mining: Handling abrasive slurries, tailings, and concentrates like zinc, nickel, and copper.

Alumina Production: Ensuring precise separation in harsh alkaline environments.

Chemical Industry: Resisting aggressive acids in the production of phosphoric acid, calcium chloride, and fertilizers.