Filtration and environmental technology company Porvair said it performed "strongly" during the year ended 30 November.The group forecast revenue rising to £20m from £6m last year, with both its divisions expected to achieve record results.Porvair's micro-filtration division saw its revenues increase by 34% while the metal filtration division rose 5%.The company expects profits to be achieved as "milestones are successfully passed over the period to 2017", it said in a statement."Order books for the start of 2015 are healthy and the group has a promising pipeline of potential projects," it continued.Shares were up 7.81% to 273.29p at 13:58 on Monday.