Backraft Damper

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut et massa mi. Aliquam in hendrerit urna. Pellentesque sit amet sapien fringilla, mattis ligula consectetur, ultrices mauris. Maecenas vitae mattis tellus. Nullam quis imperdiet augue. Vestibulum auctor ornare leo, non suscipit magna interdum eu. Curabitur pellentesque nibh nibh, at maximus ante fermentum sit amet.

Pellentesque commodo lacus at sodales sodales. Quisque sagittis orci ut diam condimentum, vel euismod erat placerat. In iaculis arcu eros, eget tempus orci facilisis id. Praesent lorem orci, mattis non efficitur id, ultricies vel nibh. Sed volutpat lacus vitae gravida viverra. Fusce vel tempor elit. Proin tempus, magna id scelerisque vestibulum, nulla ex pharetra sapien, tempor posuere massa neque nec felis.

OLS circular dual blade backdraft damper frame is constructed of high quality hot-dipped pre-galvanised steel of 1.20mm thick
OLS Non-return damper frame is constructed of high quality hot-dipped pre galvanised steel sheet of 1.20mm thick cold-formed
Due to space constraint, backdraft dampers are frequently installed closed to fan discharge in ventilation duct system causing

Circular Dual Blade Backdraft Damper

OLS circular dual blade backdraft damper frame is constructed of high quality hot-dipped pre-galvanised steel of 1.20mm thick cold-formed and fully welded at the joint. The standard frame depth is 150mm with 38mm by 3mm thick flange pre-punched with 8mm diameter holes for duct-to-duct connection; other frame depth and flange dimensions are available upon request.