PHILIPPE filters : Vacuum belt filtration equipment

PHILIPPE filters : Vacuum belt filters for solid-liquid separation

The PHILIPPE filter is a continuous vacuum belt filtration system designed to efficiently separate a solid/liquid mixture for fertiliser, hydrometallurgical, mineral and chemical processing applications. With over a century’s experience as a pioneer in the design of industrial vacuum filtration solutions for continuous processes, PHILIPPE’s filter design ensures an operating rate in excess of 98%, enabling you to achieve your production targets and process performance levels.

With a complete range of services, from engineering to commissioning, we are committed to optimising the productivity and availability of your filtration equipment while maximising the level of cake drying, filtrate recovery and washing efficiency.

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Technical sheet


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Advantages of the PHILIPPE vacuum belt filter

Cake washing efficiency

Several washing zones can be created (direct or counter-courant), and the "swimming pool" and "piston" effect achieved with this filter ensures very good cake washing.

Filtrate recovery

This industrial filter enables high levels of recovery of the filtrates in the cake, in excess of 98% depending on the product and market.

Large range of formats

This vacuum filtration equipment is available in a wide range of sizes, from pilot filters or 0.1 m² laboratory units to large production systems of up to 200 m².

High operational availability

Appropriate materials are selected for all the major sub-assemblies of the filter, especially those in contact with the product (corrosive or abrasive). The Philippe filter is also designed to be robust, hard-wearing and reliable throughout its life.

Water savings in operation

New filter cloth washing systems have been developed to reduce water consumption. It is also possible to recirculate water from the filter or process in a number of ways: counter-courant cake washing, reusing the cloth and belt washing water, or the vacuum pump liquid ring water, etc.

Industry 4.0-driven safety and equipment

The filter is fully protected with grids and emergency stop cables to meet CE standards. The filter can also be fully controlled using smart measurement sensors, enabling the filter's operating parameters to be controlled based on the incoming/outgoing flows and the customer's process requirements.

Easy maintenance and adjustment

The PHILIPPE filter has easy access for maintenance operators. The vacuum box tilting system makes it easy to clean and adjust the internal movable dams defining the different zones of the filtration cycle. The filter is also continuously self-adjusting, with automatic tensioning and guidance of the filter cloth.

Flat filter top

The belt support (belt or roller system) provides effective support for the filter belt and keeps it as flat as possible. A flat belt ensures a good distribution of the slurry, resulting in a flat, evenly spread cake that dries and washes well.

Belt manufactured and checked by our experts

HASLER Group carries out the cutting of the rubber belt in its workshops using its own custom-built machine. The raw belt arriving in our workshops is checked and subjected to rigorous tests. It is then cut straight along each edge, after running for 24 to 48 hours on our machine to remove any mechanical stress. Finally, it is custom-grooved and drilled to suit each filter size or process.

Applications of the PHILIPPE vacuum belt filter


Vine residue, gypsum, barium, barite, aragonite, andalusite, ammonium, bauxite, activated carbon, alginates, inulin


Cobalt, aluminium, jarosite, indium, nickel, zinc, silver


Oil sands, cobalt, uranium, uranate, colloidal silica, phosphogypsum, jarosite, furfural, calcium sulfate, copper oxychloride…


Cobalt, aluminium, jarosite, indium, nickel, zinc, silver


Rare earth oxalates, nitrocellulose, glutamate, enzymes, citric acid, boric acid, aspartame, alkalis, acetic acid, soda ash, zeolite, tartaric acid, stearic acid, sodium dichromate, pentaerythritol, methionine, hydrazine hydrochloride, glycoluril, gas desulfurisation, gallic acid, phosphoric acid




Animal feed, threonine, potassium, phosphate, sylvinite, magnesium…



Operating principle and description of the PHILIPPE vacuum belt filter


The principle of the PHILIPPE vacuum belt filter involves placing the slurry horizontally on the filter cloth and assisting the separation of solid and liquid under the effect of gravity and the vacuum absorption of the filtrate. This continuous process filtration system has the following main features:

/ Factory-vulcanised endless belt with curbs (patented belt edges) that flex and follow the drums closely, and keep the product contained.
/ Sturdy frame made of flat cut sheet metal for the standard filter range or structural steel for the other ranges.
/ Easily accessible pneumatic tilting vacuum box (omega profile).
/ Water-lubricated endless belt support system and replaceable high-density polyethylene (HDPE) sliding strips.
/ Rubberised drums with one-piece steel shaft.
/ Fully automatic cloth guidance system.
/ Pneumatically driven cloth tensioning system without counterweight.
/ Anti-drip discs to protect drum and roller bearings.

Optional : high-pressure wash ramp (high-pressure cleaning), ultrasonic wash system or acid wash tank for the filter cloth, wide range of feeders available depending on your slurry and process, cloth dewrinkling roller, discharge roller, steam hood etc.

We can carry out filtration tests in our laboratory or at your site to specify the right equipment for your process. HASLER Group experts can help you to set up the PHILIPPE vacuum belt filter and provide training for your teams.

HASLER Group global support services for filtration solutions


To improve the performance of your filters and the availability of your industrial filtration installations, our experts can help you with:

/ Technical audits or industrial process audits.

/ On-site services such as installation, commissioning, maintenance, assistance or repair.

/ Supplies of material tests, simulations and filtration tests: Büchner product characterisation test.

/ Training on your equipment to improve the skills of your maintenance or production teams.

/ Revamping, retrofit or upgrade services to make your vacuum belt filters more reliable: tilting vacuum box, cloth guidance, cloth tensioning, cloth cleaning (high-pressure ramp, ultrasound), cloth positioning (forming roller, dewrinkling roller), cake discharge (counterweight scraper, micrometric scraper, debasting scraper etc.)

/ Revamping and retrofit services to improve your filtration processes: original performance (moisture, cake washing, filtrate recovery, vacuum), process defects (slurry feed, washing, removal, cleaning clogged cloths)

/ Mechanical revamping services: equipment adjustment (unit alignment, belt adhesion, table flatness, roller table), upgrade (IE4 motor, drum relining)

/ Revamping and retrofit services to improve your belt filters used under harsh, aggressive operating conditions: cleaning of soiled equipment, reconditioning materials damaged by saline or corrosive environments: repairs to the structure, 316L and 904L materials, coatings etc., changing belt materials (SBR, EPDM etc.)

/ Advice and supplies of spare parts: drainage support (rubber belts, perforated sheets, drain boards), belt edges (heels), filtration cloths, mechanical parts (drums, rollers etc.), wear parts (slide strips, belts etc.), washing and discharge (sprayers, scraper blades etc.), sensors and detectors etc.