Porvair Regulatory News (PRV)

For immediate release 2 June 2011

Porvair plc ("Porvair" or "The Group")

Trading Update

Porvair, the specialist filtration and environmental technologies group, today issues a trading update ahead of the publication of its interim results on 27 June 2011.

The Group has started 2011 well and expects to report interim profits well ahead of 2010. Revenue growth in the first six months of the financial year is expected to be 6% at constant currency rates. Order books have strengthened throughout the period and the pipeline of potential projects is encouraging.

Cash generation has continued to be healthy and net debt is expected to be around £9.0m (31 May 2010: £14.3m).

An analyst briefing will be held at 9.30 am at Buchanan Communications, 107 Cheapside, London, EC2V 6DN on Monday 27 June 2011.

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Notes to Editors

Porvair is a group of specialist filtration and environmental technology businesses. Its businesses design and manufacture a range of bespoke consumable filtration products that are used in a range of niche filtration markets. Its principal markets are aviation, energy and industrial process, environmental laboratories and non-ferrous metals.