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SAG 420

Solid Aerosol Generator SAG 420 for aerosol generation from powders, belt dosing, high mass flow rates, best for motor intake filter testing acc. ISO 5011

The Dust Feeder / Dust Disperser SAG 420 is a device for generating solid aerosols by transforming a powdered solid into the air-floating state and has a very large dosing range.
Dust Disperser SAG 420, frontal view Dust Disperser SAG 420 on a weight scale with housing Dust Disperser SAG 420, frontal view
- dosing continuity of different dusts over a long period of time
- under operating conditions easy refillable
- mass flow control by weigh scale option

In applications where air-floating particles are required such as testing of the separation performance of filter media an aerosol with certain, well-defined characteristic features and stability over a period of time is to be used. If the aerosol is produced from a certain powder the characteristic features of the generated dust will be determined by the powder. Additional characteristic features of the aerosol are achieved by transferring the powder into the air-floating state. The process is divided into two parts: the continuous dosing of the powder mass flow and the dispersing (thinning out) of the powder preferably down to the primary particle size of the material.

Standards

VDI 3491-3
ISO 5011
ISO 12103-1
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+49 (351) 2166 430

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Benefits

  • dosing continuity of different dusts over a long period of time
  • refill during operation
  • mass flow control by weigh scale option

Applications

  • charging of filters, filter media and separators with dust
  • generation of dust to determine the fractional as well as the total separation efficiency
  • visualization of air streams

The dust feeder SAG 420 combines the two processes of dosing and dispersing in one unit and ensures the generation of a well-defined, stable aerosol over a certain period of time.
The operating principle is based on the adjustable and defined addition of fine solids from a holding vessel via a dosing belt to a dispersion nozzle, analogous to directive VDI 3491-3. In the nozzle the fine dispersion is achieved by means of a compressed gas, preferably air.
The solid material is conveyed using a feeding screw and is then captured in a feeding hopper which leads to the dispersion nozzle. The latter operates according to the injector principle. The propellant (compressed air) causes a defined volume flow and the solid material contained in it will be dispersed by the shearing forces of the turbulent gas stream. The generated aerosol is then available at the outlet of the nozzle.

Parameter title Unit Value
setting resolution 3 - continously adjustable
setting range 3 % 0 ... 100 (relative stirring frequency
setting parameter 3 - relative stirring frequency
setting resolution 2 - continously adjustable
setting range 2 % 1 ... 100 (relative belt velocity)
setting parameter 2 - relative belt velocity
setting resolution 1 - continously adjustable
setting range 1 bar 1 ... 6 (dispersion pressure)
setting parameter 1 - dispersion pressure
aerosol, mass flow rate (aerosol substance) g/h 6 ...12000 (for bulk density of 1 g/cm³)
aerosol, volumetric flow rate L/h 3000 ... 18000
operating medium, gas/air - dry, particle-free compressed air or technical inert gas
operating medium, gas/air - compressed air supply bar ≤ 8
operating medium, aerosol substance - filling volume mL ≤ 2000
operating medium, aerosol substance - powder, powder mixtures (< 200 µm, non-abrasive, non-cohesive, non-toxic)
power supply - 110 ... 240 VAC; 50 ... 60 Hz
dimensions (w × h × d) mm 150 × 450 × 400 (generator with hopper and nozzle); 295 × 160 × 215 (control unit)
weight kg 4,7 (generator with hopper and nozzle); 3,8 (control unit)
hose connector mm Ø 16 (ISO nozzle), Ø 25 (heavy duty nozzle)
  • movable rig SVE 430 for dust disperser SAG 420
  • tripod holder
  • hopper without dispersion nozzle to collect dosed dust – can be attached for weighing the dust and calibrating the device
  • weigh option: optional scale available for mass flow control with a precision of 0.2 g/min that ensures exact feed over long periods of time, the generator is mounted on the scale in a vertically adjustable stand with housing
  • Electrostatic Aerosol Neutralizer EAN 581 for discharging of the charged test dust

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ASHRAE Dust Disperser SAG 440, front view
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Solid Aerosol Generator SAG 410, front view
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Solid Aerosol Generator SAG 410 side view
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SAG 410/P

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Solid Aerosol Generator SAG 410/P, frontal view
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Solid Aerosol Generator SAG 410/U side view
detail view

SAG 410/M

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Solid Aerosol Generator SAG 410 side view
detail view