Description

Low-concentration solid particle aerosols from powders are required for many applications in

research, development, and quality assurance and for the calibration of particle

measurement devices.

For more than 25 years, the RBG system has been successfully used worldwide for the

reliable dispersion of non-cohesive powders,e.g. mineral dusts, active pharmaceutical

ingredients, pollen, etc., within the size range of < 100 µm and with a fine fraction of < 100

nm. Monolithic solid materials, e.g.blackboard chalk, are finely dispersed with

optimal dosing constancy.

The special advantage of this dosing and dispersion system is the fact that mass flows

can be dispersed twice as quickly with the RGB 2000. Mass flows of between approx. 20 mg/h

and 560 g/h are dispersed with optimal dosing constancy due to the quick and easy

replacement of the solid material reservoir.Optional: Pressure-resistant up to 3 bar

Startup

The powder to be dispersed is gradually poured in the cylindrical solid material

reservoir and compressed with a tamper. The filled reservoir is inserted into the dispersing

head on the RBG and the powder, which has been uniformly compressed at the filling level,

is conveyed onto a rotating brush at a precisely controlled feed rate. The adjustable volume

flow moves over the tightly woven precision brush at very high speed and pulls the particles

out of the brush.

The dispersing head assembly comprises a dispersing head, dispersing cover, precision

brush, and solid material reservoir. 

Dosing

Dosing is performed based on a precisely controlled feed rate on the feed piston. The

desired mass flows are able to be easily and reproducibly defined based on the cross

section of the reservoir, the precisely adjustable feed rate of the feed piston, and the

compacted density of the powder in the reservoir.

Dispersing

The powder conveyed from the reservoir by the precision brush is virtually completely

dispersed into individual particles up to < 100 nm by the dispersing air in the dispersing head

(see Fig. 2).