Buy your unused & surplus, second hand / used Rotary Vacuum Filters from IPP. Choose from 15 models in stock now for immediate delivery.

Process Filtration involves the separation of solids from fluids (liquids or gases) or the removal of contaminants within a fluid. This technology is crucial in industries like chemical, pharmaceutical, and oil and gas, ensuring product purity, compliance with environmental regulations, and protection of downstream processing equipment. International Process Plants (IPP) offers a variety of different types of used and new surplus process filters. Here's a detailed explanation of how each type of filter works along with some major original equipment manufacturers:

1. Air Filters:

   • Function: Capture and remove particles and contaminants from air and gases. They are often made from fibrous materials.
   • Manufacturers: Camfil, Parker Hannifin, and Donaldson Company.

2. Basket Filters:

   • Function: Feature a basket-shaped strainer inside to remove large particles from liquids. The basket collects solids and can be removed for cleaning.
   • Manufacturers: Eaton, Rosedale Products, and Hayward Industrial Products.

3. Cartridge and Candle Filters:

   • Function: Cartridge filters contain disposable or cleanable cartridges used for fine filtration. Candle filters are similar but use long, narrow cylinders. Both are used for fine particulate removal.
   • Manufacturers: Pall Corporation, 3M, and Sartorius.

4. Horizontal Belt Filters:

   • Function: Utilize a continuous synthetic cloth belt that moves on a horizontal plane where a slurry is applied. The liquid filtrate passes through the belt and solids stay on top.
   • Manufacturers: ANDRITZ, Compositech, and BHS-Sonthofen.

5. Nutsche Filters and Nutsche Filter Dryers:

   • Function: A closed filtration system used for batch processing that combines filtration and drying. Solids are retained on a filter plate, and the filtrate passes through, with the capability to dry the cake in the same vessel.
   • Manufacturers: Rosenmund Guedu (De Dietrich Process Systems), Heinkel, and BHS-Sonthofen.

6. Pan Filters:

   • Function: Similar to rotary drum filters but with a shallow pan. The pan rotates through a slurry, collecting solids on the filter media on the pan surface.
   • Manufacturers: WesTech Engineering and ANDRITZ.

7. Plate and Frame Filters:

   • Function: Consist of alternating plates and frames with filter media between them. The slurry is pumped into the frame spaces and filtrate passes through the media leaving solids behind.
   • Manufacturers: Eaton, NETZSCH, and Durco Filters (Ascension Industries).

8. Pressure Leaf Filters:

   • Function: Consist of a vertical or horizontal pressure vessel with multiple filter leaves stacked inside. These leaves filter the liquid as it passes through under pressure.
   • Manufacturers: Sparkler Filters, Durco Filters, and Sharplex Filters.

9. RO and Ultra RO Filtration Systems:

   • Function: Use semi-permeable membranes to remove ions and particles from water. Ultra RO systems provide even finer filtration than standard RO systems.
   • Manufacturers: GE Water & Process Technologies, Veolia, and SUEZ Water Technologies.

10. Rosenmund and Cogiem Filters:

    • Function: Rosenmund is known for high-performance nutsche filters particularly suited to pharmaceutical applications. Cogiem also offers specialized filtration equipment.
    • Manufacturers: De Dietrich Process Systems (for Rosenmund) and Cogiem is less commonly noted but also involved in specialized filtration setups.

11. Rotary Vacuum Filters:

    • Function: Comprise a rotating drum covered with a filter media. The drum is partially submerged in slurry, with vacuum applied inside the drum to draw liquids through the media, leaving solids behind.
    • Manufacturers: Komline-Sanderson, EIMCO-K.C.P., and FLSmidth.

12. Tower Filters:

    • Function: Typically used in applications requiring counter-current washing and thickening of filter cakes, such as in alumina processing.
    • Manufacturers: Outotec and WesTech Engineering.

These manufacturers are recognized for their robust technologies and are widely used across various industries due to their reliability and innovative designs.

Let IPP know what you're looking to accomplish and we will be happy to help you determine which filter is right for your application.

Used Filters Filtration is the separation of a fluid-solids solution involving the passing of this mixture through a porous barrier which retains most of the solid particulates contained in the mixture. The various terms used in filtration processes include: Media – the filtration cloth or barrier to collect the solids, Liquor – the solution containing the liquid and solids, Filtrate – the liquid that has been filtered clear, Cake – the solids filtered out of the liquid, Polishing – the removal of the last bit of solids for a finished liquid product, Washing – pumping water or a wash liquid over the cake, Pre-coat – coating the filter cloth with a material like diatomaceous earth to aid in the filtering. The liquor is either pushed through the filter under pressure or pulled through the filter under vacuum. The types and configurations of filters vary widely; each has its own method of filtering, its own method of discharging the filtrate and discharging the cake. Depending on the product, sometimes the filtrate is the desired product and other time the cake is the desired product. Filters are measured by the square foot surface area available for filtering, and the cubic foot cake capacity. Type of Filters: • Plate and Frame Filter Press – this is an assembly of plates covered with a filter cloth and frames designed to collect the cake, held together in a press with that has a head plate and tail plate – the press is closed by a hydraulic pump, or manually in small presses. The plates and frame can be made of many types of materials, polypropylene is popular. Many times the press has “recessed plates” where two plates form a cavity for collecting cake eliminating the frame. Filter presses must be opened and the plates separated to remove the cake. • Pressure Filters – These are batch filters that push the liquor through the filter under pressure. Once the cake capacity is reached the cake must be removed before you continue the process. All pressure filters consist of a vessel with internal filter plates or cloths. o Basket, Candle, & Cartridge filters - This type of filter has a tank with an internal basket with a cloth bag, or filter cartridges, mounted inside the tank. o Vertical Tank with Horizontal plate filters - Once the plates are full of cake the cake must be removed. In smaller filters like a Sparkler filter, the plate bundle is remove manually, in larger filters like a Shenk or Funda filter the plate bundle is rotated at a high rpm to use centrifugal force to throw the cake off the plates and remove cake from the bottom of the tank. o Horizontal Tank Vertical plate filters – the cake can be removed by shaking the plates, spraying the plates with high pressure water, or scraping the cake off as the plate bundle rotates. • Vacuum filters – These include rotary drum filters and horizontal belt filters. Both are continuous operations. o Rotary Drum filters – these are horizontal drums with perforated exteriors covered with a filter cloth and internal vacuum pipes that are designed to be partially submerged in a trough of liquor. The internal vacuum pipes create suction on the outside of the drum. As the drum rotates the liquor is pulled through the filtrate cloth and the cake is form on the outside of the drum. Before the cake dips back into the trough it is removed from the drum by a scraper or belt discharge. o Horizontal Belt filters – The liquor is spread onto one end of a horizontal perforated belt covered with a filter cloth. A vacuum is pulled under the belt creating suction on top. As the product is conveyed along the moving belt the filtrate is pulled through the belt perforations, leaving the cake on top. When the cake reached the end of the belt it basically drop off or is scrapped off the filter cloth. o Pan filters – Like a belt filter with a moving filter cloth and suction underneath, this filter replaces the belt with a series of vacuum pans that extract the filtrate while the cake is conveyed along the filter cloth. • Rosenmund Type – The major manufacturers of this type of filter are Cogiem and Rosenmund. Also known as Filter/Dryers and Nutche filters. This type of filter is typically pressure and vacuum rated internally, heated with a jacket, and has an agitation system that double as a cake discharge screw, and for added drying, the shaft of the agitator can be cored for heating and cooling. Depending on the process this type of filter can take the place of a reactor, a filter, and a dryer, all in one machine. The basic design is a large diameter tank, with a screen in the bottom head, top mounted agitator drive that can raise and lower the internal blades during different cycles. When the process is finished the agitator is lowered to scrape along the filter screen, a cake discharge valve is opened, the agitator scrapes the cake out of the filter/dryer. The newer machines have a removable bottom head so the filter screens can be removed and the bottom head cleaned without any type of tank entry. Filter/dryers are measured by the Square Meter of filter screen area. • Tower Filters – Similar to a filter press in filtration techniques. The tower press has horizontal plates with a continuous cloth woven in and out of the plates. During filtration the plate stack is closed and during discharge the plate stack is opened and the cake is conveyed out of the pres by the filter cloth. Eliminates the manual labor use to clean filter presses. IPP carries an extensive inventory of used, unused and reconditioned filters in stock including filters manufactured by: 3-L, 3V COGEIM, Acme, ACME INDUSTRIAL, Alar, Alar Auto, Alar Engineering, Allegheny Bradford, Alsop, AMERICAN FILTER, AMETEK, AMF, Amicon, Andritz, Apache, APV, Ashbrook, Aurora, AURORA FILTERS, Avery, BAEUERLE & MORRIS, BAEUERLE & MORRIS INC, Baeurle & Morris, BALSTON FILTER, BIRD, BIRD YOUNG, Cambridge, CARLSON, Carter Day, Chemap AG Funda, Chemap Ltd, CHICAGO BOILER, Chicago Boiler Co., Choquenet, Clow, Cogeim, COGEIM SPA, Comber, COMER, Commercial, Commercial Filter Corporation, COMMERCIAL FILTERS, COMMERCIAL FILTERS CORPORATION, CP 1200 F, CULTER, CUNO, CUNO/MARTIN PETERSON, CUTLER METAL PRODUCT, DELAVAL, Dorr Oliver, Durco, DURCO ENZINGER, Durco/Enzinger, Durion, Duriron, Edward & Jones, Eimco, ENVIRONMENTAL TECH, Enviroquip, Ertel, ERTEL/ALSOP, EUROFILTEC, Extract Technology, Filler Specialties, Filter Specialists, Filterdyne, Filterite, FILTRATEC, Filtration & Separat, Filtration & Separation, Filtration Eng., Filtration Engineers, Filtration Systems, Filtroba AG, Filtrox-Werk, Flexline, Flow Trend, FRANTZ FERRO, FSI, Fulflo, GAF, GELMAN SCIENCES, GENERAL FILTRATION, Guedu, Harmsco, Haward, Hercules, HERCULES FILTER, Hoechst, HOESCHT, Hovex-Holland, Ideal Welders Ltd, Idrex, IMECA, Industrial, Industrial Filter, International, Jaygo, JWI, Ketema, KETEMA NIAGARA, KLAMPRESS 8/90, Klein, Komline Sanderson, Lanco, Larox, Larox-Pannevis, Lee Ind, LEE INDUSTRIES, LS10-BO-6, MECHANICAL FILTRATION, MEMTEC, Met-Chem, Millipore, Netzsch, Niagara, NIAGRA, Nivoba, Northland, NORTHLAND STAINLESS, NUTSCHE, Oberlin, OPF 4, OPF-12, OPF-4, Padovan, Padovan Taylo, Pall Corp, PALL TRINITY, Pannevis, Parker, PARKER HANNIFIN, PARKER/FULFLO FILTER, Parkson, Passavant, Perrin, Powder Systems, POWDER SYSTEMS LTD, Pressofiltro, Quantum Technologies, Romicon, Ronningen, RONNINGEN PETTER, RONNINGEN-PETTER, RONNING-PETTER, Rosedale, ROSEDALE PRODUCTS, ROSENMUND, RP Products, RT 0575, RUSSELL FINES, Russell Finex, Saltec, Sartorius, SARTORIUS STEDIM, Schenk, Seitz, SEITZ ENZINGER, Seitz Orion, Seitz Wega, Sernagiotto, Shriver, Sietz, Sietz Enzinger Noll, SLF Inc, SPARKLER, Sparkler Filter, SPARKLER FILTERS, Sperry, Standard, Star, Star Systems, Steri Technologies, Stossier, STRAINRITE, Strainrite Inc, STRAINRITE INC., Strassburger, Sweco, T. SHRIVER & CO. INC, Technical Fabricator, Thompson, Trent, TRI-CLOVER, Triton, US Filter, USF Filtration, Valex, Velo, Vernay, Vevey, Von, Von Roll, Waterlink Lanco, Westech, WESTECH ENGINEERING, William Sprinkman, WWE, Yabuta, Zurn, ZURN INDUSTRIES, Zwag .