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Nutsche Filters
Specification
Description
Agitated Nutsche Filters are closed, batch-operated filtration systems used for solid-liquid separation, particularly in the pharmaceutical, chemical, and fine chemical industries. They are designed to filter, wash, and sometimes dry wet cakes under pressure or vacuum, all in a sealed and contained vessel.
An Agitated Nutsche Filter:
- Filters slurries to separate solids from liquids,
- Uses vacuum or pressure to enhance filtration,
- Includes an agitator to mix, level, or reslurry the cake,
- Is a closed system, ideal for toxic, sterile, or sensitive materials.
| Component | Function |
|---|---|
| Filter vessel | Cylindrical vessel that holds the slurry. |
| Filter plate | Perforated support with a filter cloth or mesh that retains solids while allowing filtrate to pass. |
| Agitator | A shaft with blades that can move vertically and rotate to smooth, reslurry, or discharge the cake. |
| Drive system | Powers the agitator’s rotation and vertical movement. |
| Pressure or vacuum port | Enhances filtration and drying. |
| Discharge valve | For cake removal, often bottom-operated. |
- Slurry Charging: The slurry is pumped into the filter vessel.
- Filtration: Vacuum or pressure forces the liquid (filtrate) through the filter media, leaving a solid cake on top.
- Washing: Wash liquid is added and evenly distributed by the agitator to remove impurities from the cake.
- Drying (optional): Vacuum and agitation help remove residual solvent/moisture from the cake.
- Discharging: The agitator blades sweep the cake toward the bottom discharge valve.
- Closed system – safe for hazardous, toxic, or sterile materials.
- Multi-functionality – filter, wash, and dry in one vessel.
- Reduced product handling – minimizes contamination and material loss.
- Efficient washing – agitator enables full cake reslurrying and remixing.
- Gentle processing – ideal for fragile crystals or sensitive APIs.
- Pharmaceuticals – API filtration and washing.
- Agrochemicals – product purification.
- Specialty chemicals – dyes, pigments, catalysts.
- Biotech – protein or enzyme recovery.
- Battery materials & advanced materials – moisture-free processing.