Vent-Axia VA Backdraught Shutter 400mm

In-line back draught shutters manufactured in electro-zinc steel these units have a positive spring return mechanism. The springs are carefully selected for positive closure without undue pressure loss. Diameters from 100 to 315mm. Also available in 400mm diameter to special request. · · · Manufactured in electro-zinc steel · · Positive spring return mechanism · · Sizes 100-315mm diameter