Vacuum Disc Filters
Rotary Disc Filters & Vacuum Disc Filters
Compositech manufactures our own rotary vacuum disc filters used extensively in pulp processing and chemical and mineral processes, but also in any filtration process which requires a large volume of filter area to de-water and dry the product. Filter cake thickness varies based on the process and the specific gravity of the material. Compositech's disc vacuum filters, also known as Sector Disc Filters or Disc Filter Saveall machines (also called rotary disc filters) are able to adapt to changes in the feed rate and the solids concentration of the slurry and provides good performance and high production rates. Compositech is able to provide vacuum disc filters design, maintenance and repair.
For certain applications, Compositech uses corrosion-resistant materials for our disc vacuum filter and rotating disc filter components. Our composite centershaft is a specialized filter component designed to provide a solution for customers filtering slurries with corrosive pH levels as low as 0.3. Many customers processing caustic chemicals or minerals also benefit from our sectors/segments made either entirely of engineered plastics or with a stainless steel frame and a body of engineered plastics.
Industries Served by Rotary Disc Filters
Compositech's rotary disc filters and vacuum disc filters are trusted across a wide range of demanding industrial applications. Industries that regularly rely on our disc vacuum filters include:
- Pulp & Paper — Disc filters are used as saveall machines in paper mills to recover fiber lost during the paper making process.
- Mining & Metallurgy — Our disc filters are engineered to withstand the high tonnage and abrasive conditions common in mining and metallurgical processing.
- Chemical & Petrochemical — Compositech's corrosion-resistant components, including our composite centershaft and engineered plastic sectors, make our disc filters well-suited for processing caustic or corrosive chemical slurries.
- Wastewater Treatment— Our vacuum disc filters support liquid/solid separation needs for both industrial and municipal wastewater treatment operations.
Whether your application involves corrosive slurries, high-tonnage abrasive materials, or continuous high-volume de-watering, Compositech has the experience and equipment to meet your process demands.
Rotary Vacuum Filter Disc Filters Design, Specs, Maintenance, and Repair
Rotary vacuum disc filters are versatile and provide reliable, continuous liquid/solid separation but they require significant operator attention and a large volume of cloth bag replacement due to the high tonnage of the abrasive materials being handled. Our technical staff has a broad background with years of experience working directly for disc vacuum filter manufacturers. With this wealth of experience, we are available to provide a range of services from simple sector recovery to complete filter rebuilds and emergency repairs for all models of disc filter.
We have many customers who regularly use our sector/segment rebuilding and recovering services. In addition to our supply of sectors and their related
parts, Compositech's inventory includes centershafts, drives, wear plates, eel slip plates, valves, and seals for all makes and models of vacuum disc filters.
Rotary Disc Filter FAQs
How does a rotary disc filter work?
A rotary disc filter continuously separates solids from liquids by rotating cloth-covered disc sectors through a slurry vat under vacuum. Liquid is drawn through the filter cloth while solids form a cake on the disc surface, which is then discharged via compressed air blowback before the cycle repeats without interrupting production. Compositech has been manufacturing and servicing rotary vacuum disc filters since 1991, with deep technical expertise in vacuum disc filter design across all major makes and models.
What are rotary disc filters used for?
Rotary vacuum disc filters are used in any high-volume process that requires continuous liquid/solid separation and de-watering, including pulp and paper processing, mining and metallurgy, chemical and petrochemical applications, and industrial wastewater treatment. Their large filter area relative to footprint makes them a practical choice where throughput and production rates are priorities.
How do I choose the right vacuum disc filter for my application?
The right disc filter depends on your slurry's specific gravity, solids concentration, feed rate variability, and the chemical properties of the material being processed. Compositech's team has direct background working for disc vacuum filter manufacturers and can assess your process requirements to recommend the right design, including corrosion-resistant configurations for caustic or low-pH applications.
Can you get parts or service for disc filters from other manufacturers?
Yes — Compositech supplies and services all makes and models of vacuum disc filters, not just our own. Our inventory includes centershafts, drives, wear plates, eel slip plates, valves, and seals for the full range of disc filter manufacturers, and we regularly rebuild and recover sectors and segments for customers regardless of who made the original equipment.
Are corrosion-resistant disc filter components available?
Yes. Compositech's composite centershaft is engineered specifically for slurries with corrosive pH levels as low as 0.3 — an environment that rapidly degrades standard cast iron components. We also manufacture sector segments in fully engineered plastics or with stainless steel frames and plastic bodies for customers processing caustic chemicals or minerals.
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