FOR IMMEDIATE RELEASE                                                                              24 March 2017

Porvair plc ("Porvair" or the "Company")

Director's Shareholding and Issue of Equity

The Company was notified on 22 March 2017 of the following exercise of options over ordinary shares of 2 pence each in the Company ("Ordinary Shares") on the same date by Chris Tyler, Group Finance Director, pursuant to the Company's SAYE Share Option Scheme.

These five year SAYE options granted in 2011 were exercisable between 1 October 2016 and 31 March 2017. Following this dealing, Chris Tyler's holding in the Company has increased by 16,586 Ordinary Shares to 449,036 Ordinary Shares, representing approximately 1.0 per cent. of the Company's issued share capital.

Following the issue of the 16,586 new Ordinary Shares, the Company has 45,343,505 Ordinary Shares in issue. There are no Ordinary Shares held in treasury. Therefore, as at today's date, the total number of voting rights in the Company is 45,343,505. This figure may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company, under the FCA's Disclosure and Transparency Rules.

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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.

Notification and public disclosure of transactions by persons discharging

managerial responsibilities and persons closely associated with them