Physiology Research 2016 by Harvard Apparatus

More catalogs by Harvard Apparatus | Physiology Research 2016 | 840 pages | 2016-08-02

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Page 295 of Physiology Research 2016

respiration systems new powder dispersion generator rbg 1000 dispersion of non-cohesive powders and dusts very constant output reproducibility variable mass flow particle size range 0.1 µm 100 µm pressure-tight against overpressure intermittent operation possible compact design and easy to transport easy handling and rugged solid construction a compacted mass of powder is loaded into a cylindrical feed stock reservoir and is fed onto a rotating brush by means of a piston the brush removes a well-defined quantity of powder uniformly this powder is dispersed and is carried away from the dispersion head by an air stream the rate of removal of material from the compact is proportional to the product of the feed rate and the cross-sectional area of the compact it is independent of the properties of the material constituting the compact any non-sticking powder from 0.1 100 microns is suitable even chemically-aggressive materials the feed rate may be varied continuously over a range of 750:1 without changing the feed stock reservoir cover particle size feed stock reservoir volume flow a b c 0.1µm -100µm 0.1µm -100µm 0.1µm -100µm 7 10 14 20 28 mm 7 10 14 mm 7 mm 2-5 m3/h 1-2.5 m3/h 0.5-1.2 m3/h the rbg1000 includes a stainless steel brush and a choice of one dispersion cover a b or c and one feed stock reservoir specifications particle material non-cohesive powders and dusts particle size 0.1 µm 100 µm mass flow approx 40 mg/h 560 g/h volume flow 0.3 5 m3/h respiration systems • • • • • • • • • respiration an adjustable air flow passes the denselywoven brush and removes the powder from the brush the powder is accelerated in the dispersion head by the airstream due to the high speed the turbulences and the shear forces in the dispersion head the agglomerates that still may exist are broken up a polydisperse solid aerosol containing nearly no agglomerates is produced the air dispersion speed is up to 180 m/s depending on the powder during particle size distribution the feed procedure it has to be considered that the powder mass is proportional to the air flow this air flow is used as energy in order to break up the agglomerates three types of dispersion covers have been developed in order to achieve an optimum relation between mass flow and air speed brush revolution number adjustable feed period between approx 5 min 70 h max the mass flow rate can be varied between 38 mg/h to approx 400 g/h at a compact density of 1 g/cm3 depending on the diameter of the reservoir and the feed speed the mass flow depends on the compact density i.e on the used powder/dust the feed period with one filled powder reservoir is related to the feed speed maximum counterpressure the generator can also be used to produce short pulses of dust due to the system s construction the compacted dust and the rotating brush the minimum pulse duration is about 5 sec dimensions 465 x 320 x 200 mm h xwxd weight 19 kg standard version up to 200 mbar pressure tight up to 3 bar overpressure electric power supply 220 v/50 hz 110 v/60 hz auxiliary energy pressurized air 4 6 bar overpressure available spare parts stainless steel or plastic brush piston diameter compact capacity feed rate 1mm/h feed rate 5mm/h feed rate 700mm/h 7 mm 3.1 g 38 mg/h 190 mg/h 27 g/h 10 mm 6.3 g 79 mg/h 395 mg/h 55 g/h order 14 mm 12.3 g 154 mg/h 770 mg/h 107 g/h py2 73-4110 dry powder disperser rbg1000 230v/50hz 20 mm 25.1 g 324 mg/h 1620 mg/h 219 g/h py2 73-4111 dry powder disperser rbg1000 110v/60hz 28 mm 49.2 g 616 mg/h 3080 mg/h 430 g/h dispersion covers 4 versions feed stock reservoirs 5 versions product harvard apparatus • phone 508.893.8999 • toll free u.s 800.272.2775 • fax 508.429.5732 • www.harvardapparatus.com f19