Agitated Nutsche Filters (ANF's) - S2 Engineering Industries

S2 ANF manufacturing S2 Engineering (S2) provide a full turnkey sevice for Agitated Nutsche Filter's (ANF's) from design and manufacture to assembly, installation and commissioning. Our ANF product range also includes the manufacture of modular Filter Dryers (ANFD's) - read more

Like our ANFD's, our modular ANF's are innovatively designed and engineered to help improve plant operational processes efficiency. We can also provide ANF's with barrier isolator (Glove box) technology for contained discharge and/or charging operations. See our Group Isolator company here and/or see the red tab option below.

We are experienced in process media filtration and provide equipment with high levels of safety and quality that meets all appropriate industry regulations.

Our ANF's feature a differential mixing agitator and paddle that moves vertically for a thorough mix performance. The filter drier agitator consists of a series of sharp curved blades that achieves mixing penetration into difficult cakes without undue product stress. While moving and lifting the cake media around the internal clearances within the filter, agitation mixing efficiency is achieved through differential velocities. Once processed through the filtered product slurry can then sent/pumped to subsequent operations or storage vessels.

ANF Design Features

cGMP equipment design and construction
Single (Monoblock) or Double (Detachable base) model options
Highly efficient optional integral drying system (ANFD)
Minimum gap design allowing reflux cleaning to achieve typically 2.5ppm to non-detectable
Minimum solvent volumes beneath filter mesh for process optimisation
Total interchangeability between cloth and mesh filtration media
Optional detachable portable filter unit supplied on caster wheels (far right photo)
High strength, precision machined inter-locking castellations on ANF base and portable filter unit (double version only).
FEP Elastomer sealing
Detachable bottom from shell can be aligned by ‘ Super Clamp’ or Bayonet Type instead of conventional C clamp arrangement (see supply options)
Thorough cake washing as desired.
Product purity can be maintained.
Complete Automation with PLC based control is possible (see options).
The machine can be designed covering small to large filtration areas
Solvent recovery is achievable.

ANF Integrated Discharge Barrier Isolator

Schematic ANFD with barrier isolator S2's is part of a Group of Companies which includes Schematic Engineering Industries - a leading supplier of barrier isolators. As such, S2 is able to supply their ANFD's with an integrated barrier isolator, as detailed below and shown in the photo. For further information, please click here. Our ANFD Barrier Isolators have the following features;

Rugged 316 Stainless Steel build with fully welded, large radius and polished corners
Push-push type safe changeable HEPA filters on inlet and outlet vents
cGAMP - PLC/HMI controlled - Digital pressure controller or Electrical controller to maintain a constant pressure
Integrated Clean In Place / washable to reach every corner of chamber
Integrated Weighing Scale, Nutsche Filter, Vacuum Tray Dryer, Continuous liner port and Drum loader
Laminar airflow
Oxygen monitoring / Nitrogen inertization
Complete Documentation – FDS, DQ, FAT, IQ, OQ, OMM, Leak test, Lux, Noise, Air change, Filter integrity, Glove test and OEL
Integration with RTP for safe and rapid transfer
Split Butterfly valve for safe transfer of material
Multiple or Single Chambers
Isolator raise/lower systems for operator comfort

ANF Benefits

The ANF multipurpose agitator and filter solution with an unique feature being that the agitator performs a number of operations through movement in axes both parallel and perpendicular to the shaft.

This filter is mostly employed on non harduous materials, where operators are not exposured to harmful vapours when processing solvents and other potent substances. The ANF provides filtration under vacuum or pressure in a closed-loop system, a sealed vessel where solids can be discharged straightaway. The key benefits of the S2 ANF solution include;

Slurry contents are kept fluidized until most of the mother liquor is filtered.
The cake can be washed after filtration by reslurrying the cake, within an automated production cycle within the vessel.
After washing, the mother liquor can be refiltered. The cake can then be discharged by lowering the agitator and rotating it in such a manner that it brings all the cake towards the discharge port. The S2 solution minimizes any waste cake through innovative equipment design.
Versatility is achieved in filtration, washing and re-slurring with complete automation
The detachable portable filter unit improves filter access and maintenance/replacement.
FEP elastomer sealing provides optimised chemical compatiability - idea for plant batch operations

ANF Technical Info

Design & Construction: AMSE Sec.VIII, Division-I, Latest Edition
Main Dimensions: Bespoke designs to suit specific applications - see size chart in Technical section for standard designs
Flange Drilling: ANSI - B 16.6, #150
Capacity: Typically supplied from 2L (for Kilo labs) to 12,000L (for bulk production), although larger models can be designed to suit client requirements.
Pressure: 0-6 barg (0-90 psig)
Operating Temperature: up to 200 Deg.C (390 Deg F.)
Filtration: 10-200 Micron

The table below shows the S2 Engineering standard ANFD and ANF model numbers and capacities.

ANFD size chart

ANF Supply Options

Single piece – Monoblock design
Dual Piece – Detachable bottom type
Bayonet Design for holding the shell and bottom bed. This avoids the complete C clamp arrangement
CE (one piece lid/body) and AE (removable lid for cleaning) models are available
Variable Speed Drive Electric Motor for reduced equipment energy consumption.
Barrier Isolator
Full instrumentation pack for control room operation/DCS systems
Thermal Control Unit (TCU) to manage and supply the thermal heating and cooling fluid for the heating jacket, where plant services is not available. Our TCU's are supplied by our Group company. Click here for information about Sunrax Process Technologies.
Operator gantry and staircase
Controlled discharge system
Full instrumentation pack for Control Room management
Powder Loading System
Hot Water Washing Systems - CIP, SIP, WIP
ATEX Rated (Explosion Proofed) to any standard
Bespoke Guarding Systems, including laser beam guarding
Load cells - to confirm the addition or discharge of product
CE and PED compliance
S2 offer a range of high chemical resistant ANF and ANFD solutions including chemical resistant vessel materials and coatings, as outlined below.

Alternate Materials of Construction: In addition to various grades of Stainless Steel (304, 316 and 416), ANFD's can be supplied in a number of different materials of construction including Alloy 20, Titanium, Alloy 22 and Alloy C276 (Hastelloy C).

Chemical Resistant Coatings: Compared to exotic alloy materials, chemical resistant coatings provide a lower coat of supply solution when processing highly aggressive substances. Our StanCoat high chemical resistant coating is an example of such a coating and this is also conducive for food grade applications. Read More