Filter dryer – Filtrodry FEP/XD

Nutsche type pressure filters are extensively used to separate solids from liquids with the added benefit of removing impurities.
When drying is also required or the transfer of wet cakes to a dryer can impact product quality or when it is potentially hazardous to operating personnel, we provide filter dryers that combine pressure filtration and vacuum drying in one unit.
A filter dryer can process a concentrated slurry and discharge a dry powder.

All operations are conducted without exposing operators to the products and without contaminating the product itself, ensuring safety and quality at the same time.
We provide special solutions to keep the process fully contained, also during the product’s filling and discharge phases.


Features and options

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The Nutsche pressure filter dryer is recommended for pressure filtration, “re-slurry” washing, smoothing and displacement washing, and vacuum drying & product discharge.
The proprietary four arms agitator doubles the heated surface in contact with the product and reduces drying time by approximately 50%.


  • Filtering surface up to 8 m2
  • Design pressure: – 1 barg to + 6 barg
  • Design temperature: – 25°C to + 200°C

Flat bottom

  • Flanged to the cylindrical vessel, secured with:
    • C-clamps
    • Swing bolts
    • Super clamp
    • Hydraulic bayonet
  • Welded to the cylindrical vessel

Filter media

  • Monolayer:
    • Synthetic cloth
    • Metal mesh
  • Sintered multilayer metal mesh

Top entry four arms agitator
Designed with special teeth to optimise the cake smoothing and product discharge without mechanically damaging the product

Available with:

  • Straight arms
  • “S” shaped arms

Double mechanical seal

  • Flushed
  • Dry running
  • Gas lift off

Top mounted dust filter

  • Textile synthetic dust bags
  • Metal multilayer cartridges

Side discharge port
Fixed flush to the filter screen and the vessel side wall

Available options:

  • Manually opened hinged plug for discharge into isolator
  • Hydraulically operated O-ring type discharge hatch
  • Hydraulically operated metal – metal straight type discharge hatch
  • Hydraulically operated metal – metal “reverse” type discharge hatch

Cleaning-in-place (CIP) systems
The following options are used to wash the internal surfaces in contact with the product:

  • Vessel CIP spray balls
  • Mechanical seal recess spray ring
  • Process connections spray nozzles
  • Dust filter spray balls
  • Dust filter spray nozzles
  • Discharge hatch spray nozzles
  • Discharge hatch seal spray nozzles

Welded waterproof insulation

Chemical, pharmaceutical and sterile versions

Material of contact (MOC) with the product

  • 316L stainless steel
  • Duplex stainless steels
  • Alloy C 22
  • Titanium

Other materials are available on request.


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Discharge isolator (up to OEB6)

Pack-off isolator (up to OEB6)

Temperature control unit (TCU)

  • Steam or water operated
  • Electrically operated

Vacuum skid

  • Dry running vacuum pump
  • Oil lubricated vacuum pump
  • Liquid ring vacuum pump
  • Pre-condenser
  • Post-condenser
  • Condensate recovery tanks
  • Condensate extraction pumps

Other accessories

  • Inerting systems provided with oxygen analyser on request
  • PLC automation systems


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Top performing for filtration and drying pharmaceutical products, such as APIs (active pharmaceutical ingredients) and HPAPIs (highly potent active pharmaceutical ingredients), they are extensively used also in other industries, such as:

  • Biochemicals
  • Crop protection
  • Flavours & fragrances
  • Food & beverage
  • Pharmaceutical
  • Polymers
  • Precious and technology metals
  • Waste recovery

Depending on the product and/or application, different construction materials are provided, including glass lined filter dryers to be used in aggressive acid conditions.

More about glass lined filter dryer – Filtrodry FEP/GL

Filter dryers can be provided as standalone units or modular turnkey systems to simultaneously satisfy functional needs and efficiency in project costs and execution time.

More about plants

More about processes

For new or innovative applications or to assess the correct sizing for consolidated processes as well, we provide support to customers with testing operations to study product behaviour, select filtration media, identify the ideal process parameters and support scale-up.

More about R&D

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