(ShareCast News) - Specialist filtration and environment technologies group Porvair said on Thursday that interim profits are in line with management expectations and will be ahead of those reported in 2015.In a trading update ahead of the interim results on 27 June, the company said it expects to report constant currency revenue growth of around 10%, with most markets experiencing good demand.In addition, Porvair said order books for the second half are healthy.During the period, the company acquired TEM, which it said was performing well.Investments were made in expanding manufacturing facilities in both the US and UK and net cash at 31s May 2016 stood at £7m.At 0923 BST, shares were up 1% to 325.10p.