The aerospace and industrial division, which makes more than 150 different filters found on planes, was the main growth driver, with sales rising 18% in the year ended November 30.
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Solid performances in the laboratory and metal melt quality divisions mean earnings for the year are now forecast to be ahead of management’s expectations.
Analysts at Peel Hunt had expected the company to turn a pre-tax profit of £12.0mln but has now upped that to £12.3mln.
As for the outlook, Porvair told investors that group order books for the start of the new year are “healthy”.
Shares rose 6.5% to 436.7p in early deals on Friday.