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For the comminution of soft to medium-hard, brittle and fibrous materials and for sample preparation according to RoHS (e.g. for detection of hexavalent chromium).
Areas of application
Soft substances such as plants, wood, roots, leaves, needles, spices, textiles, leather, chemicals, foodstuffs, grains, cellulose, chalk, kaolin, coal, soil (without stones). Medium-hard substances such as drugs, dragées, tablets, fertilisers, pellets, animal feed.
Temperature-sensitive samples can be comminuted because the fast, effective grinding reduces the thermal load on the grinding material. Difficult-to-grind samples such as styrene, polyester, synthetic resins, films, PVC, PP and PE can be made brittle, for instance through addition of liquid nitrogen, and then ground to analysis fineness. Furthermore, the Variable Speed Rotor Mill PULVERISETTE 14 is recommended for sample preparation according to RoHS.
Method of operation
A rotor with moulded-on ribs spins at high speed to comminute the sample through collision forces. In addition, the sharp-edged teeth together with the inserted sieve cut the sample through shearing. In the last comminution stage, the sample is subject to friction between the rotor and sieve.
Features overview
- Changer system consisting of rotor, collecting vessel, sievering and labyrinth seal, completely removable and re-insertable without tools
- Regulated rotor speed (6,000-20,000 rpm)
- Optimal grinding chamber external cooling with extremely high air throughput
- Wear-free rotor made of stainless steel capable of accepting extreme loads
- Wear-free labyrinth seal between grinding chamber and drive motor
- High speed stability even under full load
- Conversion kit for iron-free grinding
Equipment
As a standard you receive the Variable Speed Rotor Mill PULVERISETTE 14 in the basic configuration with collecting vessel and lid. Impact rotors and sieve rings are offered in various designs and materials and must be ordered as accessories.
| Voltage/connection values: | 100-120/200/240 V/1~ * |
| Frequency: | 50-60 Hz * |
| Input Power: | 1150 W * |
| Operating principle: | Impact force |
| Grinding tools: | Impact rotor, pin insert, impact bar |
| Materials of the grinding tools: | Stainless steel, pure titanium, TiN-coated steel, WC-coated steel |
| Rotor speed: | 6,000 - 20,000 rpm |
| Feeding: | Batch-wise/continuous |
| Max. feed size: (depends on material) | 10 mm |
| Min. sample quantity: | 5 - 10 ml |
| Max. throughput quantity: (depends on material and sieve size) | 5 l/h |
| Final fineness: (depends on sieve insert) | 0.08 - 6 mm |
| Dimensions: (W x D x H) | Bench top instrument 31 x 48 x 47 cm |
| Weight: | 23 kg |
| *Voltage indicated by customer is set |
Suitable for the following material samples
soft, medium-hard, brittle, fibrous
Accessories
Please note: For this FRITSCH mill, you require an impact rotor and at least one sieve ring.
Impact rotors made of stainless steel
Sieve rings made of stainless steel
Sieve rings with reinforced edges for heavy duty loads made of stainless steel
Accessories for heavy-metal-(iron)- free grinding
Accessories for RoHS sample preparation
Accessories for difficult-to-mill and temperature-sensitive samples
Sieve rings made of stainless steel for impact bar
Accessories for grinding without a sieve
Accessories for grinding large quantities
Accessories for sample exhaust system with cyclone separator
Accessories for automatic sample feeding
Certification
Selection aid accessories for the PULVERISETTE 14
| Impact rotors | |
| 8-ribs impact rotor | for fast comminution of fibrous substances |
| 12-ribs impact rotor | for feed particle sizes < 10 mm |
| 24-ribs impact rotor | for fine materials with a feed particle size < 5 mm |
| Sieve rings | |
| Sieve rings with trapezoidal perforation | for additional shearing effects for fast comminution of medium-hard to soft materials |
| Sieve rings with round perforation | for fast comminution of brittle materials and medium fineness with narrow particle size range |
| Sieve rings with reinforced edges | for heavy duty loads |
| Heavy-metal-(iron-)free grinding | |
| PTFE-coated lid and collecting vessel | |
| 12-ribs impact rotor and sieve rings with reinforced edges made of pure titanium |
for grinding soft samples |
| Impact rotor and sieve rings TiN-coated | for grinding medium-hard samples |
| Sample preparation according to RoHS | |
| 12-ribs impact rotor and sieve rings with trapezoidal perforation tungsten-carbide-coated |
for example for verification of hexavalent chromium |
| Impact bar |
| For smooth pre-crushing and fine comminution of hard-brittle to soft, temperature-sensitive and fatty samples as well as samples with residual moisture. Please note: impact rotor and special sieve ring for the impact bar are additionally necessary. |
| Grinding without sieve |
| Pin insert consisting of pin rotor and grinding chamber lid with pin insert for grinding of the most difficult, medium-hard, oil- or grease-containing materials such as waxes or paraffins. |
| Grinding of large quantities |
| Conversion kit for grinding large quantities for comminution of sample quantities of up to 1 litre in a single step and for grinding very light materials* or temperature-sensitive samples*. |
| Automatic Feeding | |
| Vibratory Feeder LABORETTE 24 |
to ensure a continuous and exactly proportioned feeding of the sample |
* The conversion kit for grinding large quantities is also recommended for the grinding smaller quantities of very light materials or temperature-sensitive samples, because the conversion kit ensures a higher air throughput resulting in a better material yield and cooling.
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