The difference between Compressed Carbon Block and Extruded Carbon Block

Carbon Blocks, are one of the most effective and widely used technologies in the Point Of Use (POU) drinking water treatment industry. Solid carbon blocks, or simply carbon blocks, are employed either as standalone treatment methods or in conjunction with other filtration technologies. While seemingly simple at first glance, there are many factors to evaluate when designing and manufacturing an efficient carbon block water filter.

The Manufacturing Processes:Compressed Carbon Block VS. Extruded Carbon Block

Carbon block is manufactured using one of two processes: extrusion or compression molding.

Extruded carbon blocks are manufactured using a mixture of carbon, binder and other media that is forced through a die to form a continuous block. The block is then trimmed to size.

Compressed carbon blocks are manufactured individually in a mold under great pressure and high heat and then trimmed to size.Compression molding utilizes a more labor intensive manufacturing process with a lower production rate.

However,compression molding also provides a final product with more consistent filtration properties, due somewhat to needing less binder material to manufacture a cohesive carbon block.

Beyond simply requiring less binder, another advantage of compression molding over extrusion is the broader array of binding materials from which to choose.

Due to the greater temperatures and pressures employed in the compression molding process, specially formulated binders that are more porous may be used to prevent the binder from masking the carbon’s inherent porosity. This yields a more efficient use of the material, resulting in superior performance and increased capacity when comparing same sized blocks.

One final difference between the two manufacturing processes is that compression molding of carbon blocks provides more variability in filter shape, which adds greater flexibility to product design. Carbon block filters go beyond the aesthetic improvement of water by reducing particulates, microscopic cysts, lead, volatile organic chemicals (VOCs), and other contaminants.

Pursafet’s Carbon Blocks

All of Pursafet’s carbon blocks are for the compressed type carbon blocks with all the specified advantages. We own a 7000 square meters carbon block manufacturing facility, the carbon block annual production capacity reaches 5 million pieces of both standard and customized size to meet your different requirement.

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