DVS4 capable of reaching S5 rating at medium pressure. Manufactured to comply with B&ES specification DW/144 2013. Specifically designed EZP corner pieces. More convenient – Stiffener can be fitted after ductwork is completed. Pre-drilled pilot holes for easier fitting as standard. Stiffener frame can be made up using fasteners or spot welded togetherreducing time to assemble over using a welded RSA frame. Cost savings – By allowing the use of shorter fasteners than when using RSA. Fixing centres rolled into the stiffener during manufacture, reducing fitting time if pre-drilled pilot holes are not required. Easier and quicker fitting time by drilling stiffener and ductwork for fasteners in single operati
