butterfly fire damper

...The fire dampers are manufactured in the following nominal sizes DN100, DN125, DN160, DN200. The fire dampers are equipped with a thermal fuse mechanism ensuring the damper switch to the safe position in case of reaching an ambient temperature equal to or higher than 72°C. The fire dampers allow using limit switches signalling closed position of the damper blade (1 limit switch) or blades (in case of using 2 limit switches). The casing is made from galvanised steel sheet; the fire damper blade is made from a silicate cement board.

...AJS supply a large range of dampers differing in style which provide varying safety features in ductwork systems which are connected to heating, ventilation and air conditioning systems from fire safety to regulating the air flow. There are various different styles of damper which can be used for different styles of application dampers include butterfly, non return, fire, smoke, constant and blast gate plus many more. Dampers are available with various different safety features.