Single nutsche filters are designed to feed, level (press), filter, wash and empty a liquid-solid suspension all in one single unit.

The machine can work at pressure and with vacuums and has a filtration plate that uses the pressure differences between the top and bottom to enable the mixture to be correctly filtered.

It can also have a special agitating equipment with a double rotating system and an incorporated hydraulic system to raise and lower the impeller for correct pressing.

Features

Filtration surfaces

Filtration surfaces from 0.05 to 12 m2

Hydraulic agitator

Includes a hydraulic agitator raising and lowering system.

Closing systems

With bayonet, superclamp or clamp closing systems according to option

Discharge outlet

Discharge outlet with a safety system that uses a pilot-operating check valve and mechanical safety system to prevent accidental opening

Optional system

Optional system for taking samples from the solid cake for quality control tests.

Compliant

Nutsche filters compliant with theATEX 2014/34/UE

Designs

Designs as per GMP

Filtration medium

Textile, sintered, polypropylene, polyester, etc.

Materials

Carbon steel, stainless steel (AISI 304L, AISI 316L), nickel-based alloys (Hastelloy), duplex 2205 and super-duplex 2507

Finishes

Pickled and passivised finishes, electropolished according to sector

Control System

With control system and interface in operating area

Sectors

Chemical

Pharmaceutical

Food

Fine Chemical

Phases of Nutsche Filters

We recommend using an inerting system before introducing the suspension to eliminate any potentially explosive area.

The shovel is located at the top to feed the suspension. Filtration commences once the product is inside the nutsche filter. To do this, the recipient needs to be pressurised so that the pressure at the top is higher than at the bottom. The top is usually pressurised while a vacuum is created at the bottom. This pressure difference is what enables filtration to take place. The filter medium retains the solids while the liquid passes through the cake and the filtration medium to the lower part of the filter plate.

After the cake is filtered, it is levelled to prevent or close any cracks. For this stage, the plate above the cake surface is agitated and lowered. In the washing process, the washing liquid is introduced into the machine and the agitator mixes it with the cake.

The next phase is drying the cake. This is done by connecting the vacuum at the top and providing the necessary heat via the heated parts (heated tank wall, plates and filter base). The plate rotates in the opposite direction to raise the cake and improve heat transmission and so facilitate evaporation of the solvent.

The discharge port is opened and the product is automatically discharged by turning the plate. The discharge flow can be changed using the plate speed. The product can be discharged in an inert atmosphere if the product so requires.

Single Nutsche filters image gallery

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