Search

FLASH - a newly developed explosion suppression system

Janssens, H.

A very good alternative to explosion pressure release is offered from Stuvex International (Kontich/Belgium) by the technique known as explosion suppression. This method detects an explosion in its infancy and does suppress it in milliseconds. The chemical reaction is simply interrupted by extinguishing the developing fireball immediately after ignition. The Stuvex FLASH system was developed to eliminate the disadvantages of conventional systems mentioned earlier. For most applications, FLASH uses the PD S detector. This is an economical membrane detector. In cases where large variations in pressure or serious vibrations occur, a membrane detector cannot be used. For these applications, FLASH uses the PF P detector. It consists of a piezo-resistive component and an infrared detector. The detectors are supplied with MIL-Spec connectors and pivoting assembly systems, which further reduce inspection times. The extinguishing agent is stored in unpressurised, sealed bottles with a gas generator fitted to this bottles. The operation of the gas generator is comparable with gas generators used in air-bags. After activation the extinguishing agent bottles do not need to be replaced. The extinguishing agent is supplied in convenient kits, which enable the user to refill the bottles themselves. Sodium bicarbonate extinguishing agent is used in most circumstances, but water also appears highly promising. The STUV-1 electronic control system offers many possibilities such as monitoring the cabling system for wire break short circuit or earth fault. The control system is CEN approved and meets all the relevant European Standards, including fail-safety and EMC.