Flame Arresters



The Davy lamp of the early 19th century probably incorporated the original flame arrester, with a metal gauze surrounding the flame on miners oil lamps to cool potentially explosive vapours down to a safe temperature.

However, the limited heat dissipation of the gauze, together with its low mechanical resistance and the possibility of mesh clogging reduce the reliability of arresters using this early principle.

The more effective AVAL equivalents are based on a corrugated ribbon designed, whereby two metal strips one crimped and one flat  are wound round a central, the resulting tube banks being assembled in a ring and locked between two conical bodies by tie rods and jacking bolts.