Ultra Centrifugal Mill
- Retsch - ZM 200
- Material feed size: < 10 mm
- Final fineness: < 40 µm
The Ultra Centrifugal Mill ZM 200 is a high speed rotor mill with unmatched performance.
It is used for the rapid size reduction of soft to medium-hard and fibrous materials.
Because of the efficient size reduction technique the ZM 200 ensures the gentle preparation of analytical samples in a very short time. The comprehensive range of accessories including a large variety of ring sieves and rotors as well as collection systems makes the Ultra Centrifugal Mill a versatile instrument that can be easily adapted to varying applications. The optional Vibratory Feeder is load-controlled via an interface and ensures a uniform grind at maximum output rate. When using a cyclone, the sample material is additionally cooled by the air stream and more rapidly discharged from the grinding chamber via the cassette pan with outlet. This effect can be increased by connecting a vacuum cleaner.
With thousands of installations, the ZM 200 has become a standard for food and feeds, for the chemical industry as well as for agricultural testing.
bones, cereals, chemical products, coal, coffee beans, collagen, corn, dried fruit and vegetables, dried larvae, drugs, electronic components, feed pellets, fertilizers, food, minerals, paper, pharmaceutical materials, plant materials, polymers, powder coatings, rice, rubber, seeds, spices, straw, sweets, textiles, tobacco, waste, wood, ... continue to application database
- Powerdrive with optimally matched frequency converter and 3-phase motor
- gentle and very rapid size reduction by pre- and fine grinding in one run
- wide speed range
- patented cassette system for maximum sample recovery and easy cleaning
- easily exchangeable grinding and sieve inserts
- defined final fineness due to ring sieves with aperture sizes from 0.08 - 10 mm
- comfortable safety housing with automatic cover closure
- motor compartment and electronics protected against dust and material penetration
- comfortable parameter setting via display and ergonomic 1-button operation
- wide range of accessories including various collection and feeding systems, rotors and sieves
In the Ultra Centrifugal Mill ZM 200 size reduction takes place by impact and shearing effects between the rotor and the fixed ring sieve. The feed material passes through the hopper (with splash-back protection) onto the rotor. Centrifugal acceleration throws it outward with great energy and it is precrushed on impact with the wedge-shaped rotor teeth moving at a high speed. It is then finely ground between the rotor and the ring sieve.
This 2-step grinding ensures particularly gentle but fast processing. The feed material only remains in the grinding chamber for a very short time, which means that the characteristic features of the sample to be determined are not altered. The ground sample is collected in the collecting cassette surrounding the grinding chamber or in the downstream cyclone or paper filter bag.
|Field of application||agriculture, biology, chemistry / plastics, construction materials, engineering / electronics, environment / recycling, food, geology / metallurgy, medicine / pharmaceuticals|
|Feed material||soft, medium-hard, brittle, fibrous|
|Size reduction principle||impact, shearing|
|Material feed size*||< 10 mm|
|Final fineness*||< 40 µm|
|Batch size / feed quantity*||300 ml with standard cassette
20 ml with mini-cassette
1000 ml with paper filter bag
4500 ml / 2500 ml / 450 ml / 230 ml with cyclone
|Speed at 50 Hz (60 Hz)||6,000 - 18,000 min-1, free selectable|
|Rotor peripheral speed||31 - 93 m/s|
|Rotor diameter||99 mm|
|Types of rotors||6-tooth rotor / 12-tooth rotor / 24-tooth rotor / 8-tooth mini-rotor|
|Material of grinding tools||stainless steel, titanium, steel 1.4404, stainless steel with wear-resistant coating|
|Sieve sizes||trapezoid holes 0.08 / 0.12 / 0.20 / 0.25 / 0.50 / 0.75 / 1.00 / 1.50 / 2.00 mm
round holes 3.00 / 4.00 / 5.00 / 6.00 / 10.00 mm
|Setting of grinding time||-|
|Collector capacity||900 ml with standard cassette
50 ml with mini-cassette
3000 ml with paper filter bag
5000 ml / 3000 ml / 500 ml / 250 ml with cyclone
|Drive||3-phase asynchronous motor with frequency converter|
|Electrical supply data||different voltages|
|Protection code||IP 20|
|Power consumption||1300 W|
|W x H x D closed||410 x 515 x 365 mm|
|Net weight||~ 38 kg|
*depending on feed material and instrument configuration/settings