Pnuematically actuated fire suppression systems
PAFSS, pneumatically actuated fire suppression systems, are self-contained suppression systems which require no electrical source for operation, and are ideally suited for a variety of different sized hazard areas. They are ideally suited as a fire suppression system in laboratory fume cupboards, in addition to control cabinets, machinery, chemical stores and other high risk fire areas.
As the system is suited for a varity of locations and uses, it can be filled with the extinguishing agent most suited to the fire risk, including powder, Co2, water, foam and other specialist agents.
Direct systems
The suppression agent is dispensed via a special tubing, which also acts as the heat and flame detector. When a fire breaks out, the tubing ruptures at the hot spot, and by depressurisation of the tubing, the cylinder valve is activated, thereby operating the extinguishing system. This system is used for small enclosed hazard areas.
In-direct systems
For larger enclosed and open hazard areas, the in-direct system is used. The detection tubing still acts as the detection device for depressurisation and operating of the system, but the extinguising agent is dispensed via metal piipework and targeted nozzles which are aimed at the hazard area.
Information sheets
PAFSS Abbot Fire Group information sheet p1 - general information
PAFSS Abbot Fire Group information sheet p2 - Direct and In-direct systems