This double layer weave belt filter cloth is the specially designed filter medium for horizontal vacuum belt filters (HVBF). It’s the essential part of the filter equipment, and well known as the “heart” of the belt filter equipment.

The vacuum belt filter cloth separate the container into upper and lower chambers. The suspension inpour on the upper chamber pumped pass through the belt filter cloth and enters the lower cavity under vacuum sub-pressure (0.04-0.07 MPa) to get a clear filtrate. The solid particles are intercepted by the belt filter cloth to form a filter cake to realize the liquid-solid separation purpose. The vacuum filter belts as the filter medium retain the cake and move together with the rubber belt, until discharge the cake at the discharge roll.

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1. Two layers for filtration and supporting respectively.
2. Dense and smooth surface to get good filtration performance, filter cake release easily, and good anti-blocking.
3. Beneficial to the slurry lateral flow and increase the effective filtration area of the filter cloth.
4. The lower layer woven by thicker yarn has a larger aperture, and as a supporting member, helps drainage and promotes the cloth adhesion tightly on the rubber belt or the roller.
5. Better tensile strength than single-layer, anti-bending, avoid wrinkles during the filtration process.

For example, in pharmaceutical production, the handling capacity of double-layer filter cloth is 30% higher than single-layer, enhance the production efficiency.

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After-treatment of the belt filter cloth includes heat setting, calendaring. It aims to increase the stability of the fabric while possibly improving performance.

1. Heat setting: Heating the filter cloth under appropriate tensile tension, eliminating the stress accumulated in the fabrics, realigning the large molecules, and then rapidly cooling to make the fabric in stable dimension and shape, anti-deform and off-tracking in use. Quality heat setting treatment improves the thermal stability of the filter cloth, reduces the heat shrinkage rate, and ensures low elongation in the filtration process.
2. Calendered: Calendering the fabric through a thermal press roll to make the surface smoother and easier cake discharge, while reducing the porosity and permeability and improving the filtration efficiency, and easy to regeneration.
3. Ultrasonic sealed edges.
4. Clipper seam & Resin coated.

Bonfilt dedicates to working as your reliable source for belt filter cloth solutions.  To choose the suitable filter cloth to your specific filters is essential to get optimal and smooth filtration property. We have in-house technicists who will help you to define the most suitable belt filter cloth and fabrication method for your application respectively, to ensure your process reach maximum performance levels for production and durability.

• European material to get excellent performance.
• Superior retention efficiency.
• Good dimension and thermal stability.
• Smooth surface, release the cake and clean easily.
• Reduce production energy cost.
• Low filter cake moisture.
• Improved throughput.
• Max width 4.6m without split joint.
• Plenty of semi-finished products in stock for rapid delivery.
• Cloth in rolls and fabricated belts both available.
• Long, trouble-free service life.
• FDA compliant for food and pharmaceutical industrial safety (please contact our sales representative to get the FDA test report).

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1. Application.
2. Model of belt filter.
3. Filtrate PH value.
4. Filtrate property like viscosity.
5. Working temperature.
6. Solid particle property like size, shape, uniformity, hardness.
7. Precise dimension, length includes the SS clipper and the width.

Horizontal belt filters are the most commonly used vacuum filters in the filtration industry, for its operational flexibility, adaptability to corrosive slurries, multiterm produce at the same time, such as multi-stage washing of filter cake, cleaning filter cloth, plate pressure to prevent filter cake cracking, etc. Also for its excellent production efficiency, which is 2-10 times higher than other vacuum filters and suitable for large throughputs.

Bonfilt is capable of providing an extensive range of filter cloth to meet the high demands of a multitude of filtration industries.