A: INDICATOR BUTTON
In normal operation a green safety band shows around the button. After
a flashback the band does not show and the outer shroud must be lifted
PRESSURE SENSITIVE CUT-OFF VALVE
In the event of a flashback the pressure wave will activate the valve
to cut off the gas supply automatically.
THERMAL CUT OFF DEVICE
Designed to cut off the gas in the event of extreme temperatures such
as a hose fire. The unit is activated at 95ºC.
SINTERED METAL FLAME ARRESTING ELEMENT
Extensive surface area designed to arrest a flashback flame quickly.
The element surface area is important to ensure long service life and
to permit high gas flow in normal operation.
Upstream of the flame arresting element, this unit ensures no gas can
backfeed and ignite incoming gases.