Conical Sieve Mills
Conical Sieve Mill with Improved Processing Properties
The strengths of the Frewitt conical sieve mills come to the forefront when high outputs are required in industrial processes. They are particularly well-suited for the de-agglomeration or particle size reduction of granulates in sophisticated processes of the pharmaceutical, food, and fine chemical sectors. Offering three standard, model sizes ConiWitt-150, ConiWitt-200, and ConiWitt-250, the ConiWitt family covers a wide spectrum of user needs, being employable either as a stand-alone system or as an integrated component in complete product flow lines. In terms of value for your capital investment, the modular design of the ConiWitt is truly the icing on the cake. The milling head is easily interchangeable by hand between the 150 and 200 models. In addition, the CW-150 and CW-200 can be converted to a HammerWitt-Lab, or to put it simply: the advantages of the conical sieve mill and the hammer mill are combined into single “agile” device. Not only is the ConiWitt flexible, but it also provides the foundation for high investment security, thanks to it’s polyvalent application offering.
Technical data
Technical data
Technical data
| Flowrate * | Voltage | Rotor speed | Power | Net wieght |
TC-Lab | 0.5 - 30 kg/h | 230 V - 50 Hz | max. 4000 rpm/min | 4.0 kW | ˜ 20 kg |
ConiWitt-150 | 500 - 1500 Kg/h | 400 V - 50 Hz | max. 2400 rpm/min | 4.0 kW | ˜ 160 kg |
ConiWitt-200 | 1000 - 2300 kg/h | 400 V - 50 Hz | max. 1800 rpm/min | 4.0 kW | ˜170 kg |
ConiWitt-250 | 2000 - 4000 kg/h | 400 V - 50 Hz | max. 1500 rpm/min | 5.5 kW | ˜ 220 kg |
* Flowrate is depending on product characteristics and particle size | |||||
Measures
Measures
| B | C | D | E | F | A-Infeed | A-Discharge |
TC-Lab | 97 | 174 | 321 | 590 | 387 | DN 170 | DN 100 |
ConiWitt-150 | 750 | 600 | 454 | 220 | 650 | DN 150 | DN 200 |
ConiWitt-200 | 750 | 650 | 454 | 275 | 650 | DN 200 | DN 250 |
ConiWitt-250 | 850 | 750 | 582.5 | 335 | 650 | DN 250 | DN 300 |
Materials
Materials
Execution | Parts in contact with the product | Parts not in contact with the product |
Material | 1.4435 / 1.4404 (AISI-316L) | 1.4301 / 1.4305 (AISI-304) |
Seals | FDA compliant plastics (EPDM / PTFE) | Various plastics |
Surface | Funnel Ra ≤ 0.8 μ / head Ra ≤ 0.4 μ, polished | Ra ≤ 1.4 μ, polished |
Weld seams | Ground and polished | Treated an brushed |
Rotor | Dry milling: rotor with 2 arms with square arm profile / wet milling: rotor with 2 arms with round arm profile | |
Conical sieve / rasp | Round openings ∅ 0.5 mm - 10 mm diam./square openings ⟨ 3.0 mm - 10 mm / rasp 1.1 mm - 8.0 mm | |
Distance Rotor / sieve | No mechanical contact (metal abrasion) | |
Construction
Construction
The ConiWitt consists of the milling head, a conical sieve, and the rotor.
- Rotor equipped with 2 arms with square cross-sections for dry sizing
- Thanks to the "Error Proof System," an incorrect installation of the
sieve in the milling chamber is impossible
- Detector / safety switch
- Temperature probe built into the arm
- The shaft lip seal, which is installed underneath the shaft ring seal
prevents during the life of the unit, any contact with the FDA
certified gear fluid when replacing the shaft ring seal. The simple
construction of the milling chamber module facilitates maintenance
considerably. Even inexperienced personnel are thus able to
familiarize themselves with this conical sieve mill very quickly.
Process
Process
The ConiWitt conical sieve mill is ideal for the de-agglomeration as well as the sizing of wet and dry substances. Additionally applicable are low-density products. Through its rotary motion, the rotor implets the product to pass through the sieve, wherein milling takes place primarily by the shearing and fragmentation of the particles between the rotor and the sieve surface. Conical sieves with hole sizes ranging from 0.5 mm to 10 mm can be used in the ConiWitt.
Options
Options
- Custom-made inlet and outlet funnels
- Flanges for ATEX T3, T4 zone 0/20 inside, zone 1/21 outside
- Swivel joint
- Through-the-wall installation (gray-white zone)
- Upgradeable with the HammerWitt-Lab head
- Easy mounting on lifting column
- Bare borne execution
- IQ/OQ protocol backup
- Materials certificate
Applications
Applications
The ConiWitt is well-suited for use in both industrial processes and lighter duty laboratory work. Thanks to it's modular design, the ConiWitt integrates readily within entire systems irregardless of the size. It functions as a stand-alone system, but can be integrated with facility into production complexes. The ConiWitt is available in the three construction sizes 150, 200, and 250, hence offering a wide range of cover for all application needs.
