Fume Extraction - The air above most of the process baths such as degreasing, pickling, plating, phosphating etc. are generally contaminated with the fumes emanating from the process and this needs to be continuously evacuated, neutralised and left to atmosphere at safe height. Fume Extraction process is achieved through the fume extraction system comprising of following.1. Exhaust blower 2. Scrubber with spray system 3. Ducting and chimney.4. Neutraliser dosing through controller for auto function.The size, type and construction material for scrubber, exhaust blower, ducting etc. varies with the process.