Acoustic Cleaning Systems for energy and process industries. Nirafon Oy specialises in engineering, production and installation of acoustic cleaning systems and devices. For almost thirty years we have closely cooperated with research institutes and different industries. This cooperation is the basis of our product development and gives us a firm background in producing practical cost effective solutions to different types of applications. Nirafon acoustic cleaning system removes particles from the surfaces by an acoustic pressure shock. With Nirafon system the complete boiler plant can be kept clean from slag and ash deposits: from the superheaters, evaporators, economizers, air preheaters to SCRs and desulphuration plants, ducts and channels, ESPs bag filters and fans.