Description
Our range of fire and smoke dampers are designed to stop the spread of both fire and smoke through ductwork, walls, floors and ceilings.
All fire/smoke dampers are tested and conform to the standards listed on page 164.
All are suitable to work in conjunction with the BMS system and suitable damper control panel.
Function
The fire and smoke damper will be held in the fully open position for as long as the power supply is maintained to the unit. In the event of a fire, the built in thermal fuse will trip and cut off the electrical supply to the motor, causing the built in return spring to drive the damper closed.
The thermal fuse consists of a duct mounted probe with a replaceable fuse to detect internal duct temperature and a non-replaceable fuse element which detects ambient room temperature. Both fuses are rated at 72°C. A test button is included in the fuse unit for local testing of the damper operation.
Please note that where the dampers are for smoke evacuation purposes and are required to fail open, they will not be fitted with thermal fuses.
Construction
The casing is manufactured from 1.2mm galvanised mild steel whilst the blades are double skin airfoil sections from 0.7mm galvanised mild steel or from 0.7mm stainless steel grade 430 or 316 optional.
Size
From 100 x 100 to 1000 x 1000 and from 100mm to 1000mm Ø.
