Scirocco 2000M

Overview

Ideally suited to the measurement of powders in the dry state, especially moisture sensitive materials, the Scirocco 2000M provides:

• Manually controlled dry powder measurements.
• Vibrating sample feed control.
• Air venturi dispersion from 0-4 bar.
• Ceramic venturi option for abrasive particles.

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How it works

In a dry powder dispersion, the dispersant is usually a flowing gas stream, most typically clean dry air. The nature of the dry dispersion process means this is normally a higher energy process than wet dispersion. As shown below, three different types of dispersion mechanism act upon the sample. In order of increasing energy input they are:

The dispersion mechanism that is most dominant will depend upon the design of the disperser, with particle-wall impaction providing a more aggressive high energy dispersion than particle-particle collisions or shear stresses.

By eliminating the need to dispose of costly and potentially harmful solvents, dry dispersion is often an attractive option. However, dry dispersion is not suitable for very fine powders (<1 micron) because the high particle-particle forces of attraction in these materials are very difficult to overcome. Care is also needed with fragile particles to ensure that only sufficient energy is applied to the sample to obtain dispersion and that particles are not being broken during the dispersion process. In such cases a wet dispersion method should be used as a method validation reference.

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Specification

General

Sample feed:

Variable feed-rate vibrating tray.

Sample dispersion:

Compressed air venture with particle and wall collision.
Pressure range 0-4 bar.

Modes of operation:

Manual

Weight:

11.7kg

Dimensions:

Width: 352mm
Height: 332mm
Depth: 355mm

Max particle size:

Up to 2000µm - sample dependent.

Installation

Voltage:

240V, 50Hz
110V, 60Hz

Power consumption:

1200VA

Compressed air supply:

Delivery: 64 l/min at 60 psi (7 bar).
Filter: 4 microns, dry and free of oil.

Air extraction system:

Air flow: 35 l/s (minimum rate).
Vacuum: 18.5kpa.
Power consumption: 850W nominal.

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