Indirect System

The indirect system only uses the detection tube to detect a fire.

The valve at the top of the cylinder is opened by the pressure in the cylinder created when the tube bursts due to the combination of radiant heat and pressure in the tube.

This will cause the extinguishing agent to be discharged through strategically placed nozzles into the protected environment.

Direct System

The direct fire suppressant system detects a fire by means of a unique and patented detection tube system. This heat-sensitive, polymer tube is constantly pressurized with nitrogen and reacts to heat in combination with the radiant heat emitted by fire.

Any flame which comes into contact with the detection tube will cause it to burst. Pressure is lost and the extinguishing agent is released via the opening created.