Mechanical Product Range Back to Catalog Mechanical Valves Protectoseal PRESSURE AND VACUUM RELIEF VENTS • Sizes 2″ (DN 50) through 12″ (DN 300) • Conforms to the latest ATEX Directive • Available in Aluminum, Ductile Iron, Stainless Steel, Carbon Steel, and Alloy C / C276 SERIES -STYLE 9540 – End-of-Line Pressure/Vacuum Breather Vent 19540 – Pipe-Away Pressure/Vacuum Breather Vent 9240 – End-of-Line Vacuum Relief Vent 19240 – Side Mount Vacuum Relief Vent 9800 – End-of-Line Pressure Relief Vent 19800 – Pipe-Away Pressure Relief Vent Download Data Sheet Mechanical