RINA Serie 500
Continuous filtering vertical worm/screen centrifuges


The RINA 500F series is a vertical axis worm/screen continuous filtering centrifuge. Fitted with a conical rotor its aim isthe continuous solid-liquid separation of any crystalline, granular or fibrous products suspended in a liquid. The RINA 500f achieves a highfilterability index to reach solid concentrations ranging between 30% and 80% and for particle sizes between 50 and 500 microns.

The main characteristics of the RINA 500F are, among other features, extremely high capacity (continuous throughput) considering their compactdimensions and weight as well astheir easy handling.If necessary, there is the possibility of cake (dewatered solid) washing and immediate separation of washing liquid from the mother liquor using two different liquid outlets.

The RINA 500 centrifuges can work in potentially explosive atmosphere, in which case they are delivered with CE-ATEX certification. Other deviceslike: cooling system, CIP, or other provisions adapted to your intended processand existing conditions are possible.


Our continuous working Filter Centrifuges 500F have a proven record of wide applications mainly in the chemical industry, pharmaceutical and food. Some examples:

  • ABS resins
  • Acetylsalicylicacid
  • Amino acid (lysine)
  • Ammonia alum
  • Ammoniabromide
  • Ammoniachloride
  • Ammoniadichromate
  • Ammoniahyposulfite
  • Ammonianitrate
  • Ammoniaphosphate
  • Ammonium sulfate
  • Anhydroussodiumhyposulfite
  • Anthracene
  • Bariumchloride
  • Bariumhydroxide
  • Bariumnitrate
  • Calciumformate
  • Calciumnitrate
  • Cellulose
  • Citricacid
  • Coal
  • Coarse sea salt (sodiumchloride)
  • Copolymer
  • Copper sulfate
  • Crotonicacid
  • Crushedplants
  • Dimethylterephthalate
  • Diphenolpropane
  • Fine salt (sodiumchloride)
  • Glycerin salt (sodium chloride)
  • Groundpinebark
  • Guanidinenitrate
  • Gypsum
  • Hexa-chlorine-cycle-hexane
  • Hexaminenitrate
  • Hydratedsodiumhyposulfite
  • Iron sulfate
  • Lactose
  • Lemonpeel
  • Lindane
  • Lithiumhydroxide
  • Magnesium sulfate
  • Melamine
  • Mercury
  • Naphthalene
  • Nickel sulfate
  • Nitrocellulose
  • Organicsulfonate
  • Paradichlorobenzene
  • Polyethylene
  • Poly-methyl-methacrylate
  • Polystyrene
  • Polyvinylchloride
  • Potassiumbicarbonate
  • Potassiumbromide
  • Potassium carbonate
  • Potassium carbonate hydrate
  • Potassiumchloride
  • Potassiumferrocyanide
  • Potassiumtartrate
    Protein salt. Binary fertilizer (sodium chloride)
  • Sesameseed
  • Shellac
  • Sodiumacetate
  • Sodium and potassiumtartrate
  • Sodiumbisulfite
  • Sodiumbromide
  • Sodium carbonate
  • Sodiumcitrate
  • Sodiumdichromate
  • Sodiumferrocyanide
  • Sodiumgluconate
  • Sodiumglutamate
  • Sodiummetabisulfite
  • Sodiumnitrate
  • Sodiumperborate
  • Sodiumphosphate
  • Sodium sulfate
  • SulphamicAcid
  • Sulphur
  • Syntheticresins
  • Tartaricacid
  • Thiourea
  • Urea
  • Vinyl acetate
  • Zinc and ammoniumchloride
  • Zinc sulfate


The RINA 500F continuous filtering centrifuges are vertical axis centrifuges fitted with a rotor unit which consists of a grooved bowl, a micrometrically drilled filtering screen and a screw for the solid removal. The suspension or mixture is fed at a continuous rate into the upper part of the machine entering the rotor in the space between the solid remover screw and the screen.

Due to the effect of the centrifugal force the solids are quickly moved against the inner wall of the screen and then pushed down on the conical conveyor (worm) to the bottom solid outlet of the machine. A kinematic geared device (reduction gear) transmits a differential speed to the faster turning screw (worm) and the slightly slower turning screen.

The uniform and thin (some millimetres) solid layer being continuously moved on the conical screw towards the solid outlet on the bottom ensures the perfect balancing. Therefore the RINA 500F offers working with high centrifugal force providing efficient solid dewatering and cake washing.

As mentioned before the mother liquid and washing liquors can be guided to two separate outlets.

Testing equipment

To ensure feasibility and desired results we can simulate your process in our test center or provide test machines for rent which includes training of your operators.


Technical Specifications

max. basket Ø
Centrifugal Factor
Overall dimensions
500F300 300 1,5-2,5 3.400 4,40 1800-2100 15 950 1000x1500x2000
500F400 400 4-6 2.900 10,00 1750-2000 30 1500 1250x2000x1700
500F500 500 8-15 3.500 25,00 1600-1900 37 2200 1500x2500x1700
500F750 750 20-30 2.000 45,00 1500-1750 55 4000 1800x2800x2000

Construction Materials

The RINA 500 filtering continuous centrifugesare built of materials compatible with the product to be processed, and will vary according to the requirements as for temperature, wearing, chemical resistance and particular specifications.

316L stainless steel DIN 1.4404
316 Ti stainless steel DIN 1.4571
904L stainless steel (Uranus B6, 2RK65) DIN 1.4539
HASTELLOY C-276 DIN 2.4819


The RINA 500F centrifuges comply with the most exigent design and quality criteria, and can be used in any industry and process. The particular features of every installation will suit to the specific application for which it has been manufactured, and will vary in function of the devices incorporated.

In any case, they meet or may meet upon requirement, the following standards:

ce EN-ISO 13849-1   ok Always subject to required PL*
EMC   ok Always
SIL 2 sil ok In function of the risk
SIL 3 sil ok In function of the risk
CE-ATEX   ex ok When required
GMP compliance   gmp ok Always


21 CFR part 11
  fda ok Can be validated
Blanketing   blanketing ok When required
Automatic discharge   ok Always
Batch/Continuous     Continuous* Always
CIP   cip ok When required
SIP   sterile NO  
EHEDG compliance   ehedg ok  
ul     ok In function of the market area
gost     ok In function of the market area
Fundations     Not necessary Self-supported
Plug & play concept   plug&play ok Always

*PL = Performance Level

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Vertical axis continuous filtering centrifuges, with feeding from the top and discharge of the solid by the bottom and washing and mother liquor liquid is evacuated tangentially and collected through a side outlet.

Simplicity of operation, robustness and reliability for intensive use.

Suitable for crystalline products in continuous process.

High treatment capacity from 4.4 to 45 cubic meters.


Tel: (+34) 93 840 70 72
Polígono Industrial Coll de la Manya
Cal Ros dels Ocells, 1-3, Parcela 8, Nave 1 y 2
08403 Granollers Barcelona (SPAIN)

© Copyright RIERA NADEU, S.A. 2013