Type DSS 1-8 activated carbon adsorber with filling of type A (activated carbon) are mainly designed for separating oil vapours from compressed air flows (dry-type separation) in pressure levels up to 16 bar for compressed air without aggressive substances. Activated carbon adsorber are therefore used, if there are no liquid contaminants, especially water or oil, in the compressed air flow. Due to the properties of activated carbon some other gaseous contaminants are separated as well.
Type DSS 1-8 activated carbon adsorber vessels are made from extruded aluminium columns and machined aluminium top and bottom end plates, joint together with screwed connections. For surface finishing purposes and for increasing resistance all extruded vessel parts have to go through a chrome(VI)-free passivation process and are finished by an impact-proof and abrasion-proof powder coating which is provided on the outer side.
The activated carbon filling is embedded between two demister pads. So compressed air, flowing from top to bottom, first passes the top demister, then the activated carbon filling and finally the bottom demister before leaving the vessel. Within the activated carbon filling oil vapours and other organic substances (mainly long-chain hydrocarbons) are separated by an adsorption process. Finally, the treated and thus cleaned compressed air returns to the top in a riser tube which is integrated into the extruded aluminium column. This way inlet and outlet provide the same connection height. Type FCA compressed air filters can be directly connected to the inlet and outlet without the need for additional piping.
Both demisters, supplied as standard, distribute the compressed air flow to the entire surface of the activated carbon filling thus providing a evenly distributed flow. At the same time the activated carbon granulate is reliably kept inside the vessel. An oil indicator equipped with pressure regulator and manual valve is provided as a standard as well. An optional 1 micron downstream filter (fine filter) is recommended to hold back abrasion of the activated carbon.
The activated carbon adsorber comply with the requirements of the Pres-sure Equipment Directive 97/23/EC, and some (depending on the model) have the CE marking of this European directive.