Resettable flashback arrestor

From GAWDAwiki

Resettable flashback arrestor is a flashback arrestor designed to provide a visual indication that a flashback has occurred, prompting the operator to check the system for faults. As the pressure wave hits the non-return valve, it pushes up a button or lever, stopping the pressure wave from entering the regulator.^[1]

References

1. http://www.bocindustrial.co.uk/bocindustrial/technical/glossary/a.asp