Bevel-helical speed reduction gearboxes B4 ft insertion side for hollow shafts The slow spee B4-SV27A

Flender/Flender Gear Units/Bevel-helical speed reduction gearboxes B4

sures aimed at emission redyuc- tion, in order to be able to take effective action on the process and/or purification side. Of par- ticular interest in this context arethe typesof plant covered bvtheamendedTechnical Directive on Air Pollution of 1. In thefieldofexhaustgasmeasurements,Iimitvalues havealready been inexistenceforcertain PAH components since 1. However, completely reliable measuring method is still not available. Corres onding activities are currently in pro res at the VDI (Verein Deutscher Inge- nieure) for devel ment of manual measuring mettod on an intermittent basis. There are signs that consi$erable equipment outlay and analytical effort will be required; obtaining measurement on this basis requires relatively long sampling duration (up to 3 hours). In contrast, the PAS permits continuous exhaust gas measurements for process and emission monitoring. The most significant factor in this context is that no timeconsuming sampling and conditioning techniques are necessary. The measurement takes only few seconds. This largely avoids the artefacts which always have to beaccepted with the previous cumulativesampling techniques and can lead to misjudgments whose consequences are hard to assess. Furthermore, the detection limit can greatly exceed the scale previously possible. 2. Working steps ) Development of laboratory PAS prototype The laboratory PAS prototype is essentially intended for aerosol-chemical, physical and techni- cal investigations under laboratory conditions during the 1st and 2nd years of the project The laborator PAS prototype affords the experimenter high degree of flexibility but, unfortun- ately, at tie expense of handiness and ruggedness ) Development of experimental PAS instruments These experimental instruments are developed from the insights gained in thelst project year and permit PAH measurement undera wide variety of real operating conditions This includes the special - aerosol sampling from the