Non Return Damper / Back Draft Shutter

Specifications

• Fully sealed low leakage 2mm thick aluminium case

• Galvanised case as an option

• Extruded light weight aluminium blade

• Each blade pivots on 5mm dia rod

• Two nylon bearings on each blade pivot rod

• 35mm flange suits all flange systems

• Standard o/all width 75mm

• Suitable for horizontal and vertical applications

• Available as rectangular, spigot, circular & oval types

• Heavy Duty version with bronze bushes steel blades etc