FLAME ARRESTER
All flame arresters have the same working principle: removing heat from the flame as it attempts to travel through narrow passages with walls of metal or other heat-conductive material. For instance, flame arresters made by most manufacturers employ layers of metal ribbons with crimped corrugations. Flame arresters are passive devices with no moving parts. They prevent the propagation of flame from the exposed side of the unit to the protected side by the use of wound crimped metal ribbon type flame cell element.
This construction produces a matrix of uniform openings that are carefully constructed to quench the flame by absorbing the heat of the flame.
This provides an extinguishing barrier to the ignited vapor mixture, and how a flame arrester works to prevent catastrophes from occurring due to the ignition of air/gas vapor mixtures.
Under normal operating conditions, a flame arrester works by permitting a relatively free flow of gas or vapor through the piping system. If the mixture is ignited and the flame begins to travel back through the piping, the arrester will prohibit the flame from moving back to the gas source.
FLASHBACK ARRESTER
When a flashback occurs, the flame burns rapidly ‘upstream’, generally causing a loud explosion. If un-checked it can continue through the torch into hoses, regulators and gas bottles/cylinders.
All flame arresters have the same working principle: removing heat from the flame as it attempts to travel through narrow passages with walls of metal or other heat-conductive material. For instance, flame arresters made by most manufacturers employ layers of metal ribbons with crimped corrugations. Flame arresters are passive devices with no moving parts. They prevent the propagation of flame from the exposed side of the unit to the protected side by the use of wound crimped metal ribbon type flame cell element.
This construction produces a matrix of uniform openings that are carefully constructed to quench the flame by absorbing the heat of the flame.
This provides an extinguishing barrier to the ignited vapor mixture, and how a flame arrester works to prevent catastrophes from occurring due to the ignition of air/gas vapor mixtures.
Under normal operating conditions, a flame arrester works by permitting a relatively free flow of gas or vapor through the piping system. If the mixture is ignited and the flame begins to travel back through the piping, the arrester will prohibit the flame from moving back to the gas source.
FLASHBACK ARRESTER
When a flashback occurs, the flame burns rapidly ‘upstream’, generally causing a loud explosion. If un-checked it can continue through the torch into hoses, regulators and gas bottles/cylinders.
A flashback arrestor is designed to contain a flashback, and prevent it from penetrating into “upstream equipment” (e.g hoses, regulators and gas cylinders).
The main parts of a Flashback Arrestor and their functions are;
- Non-Return Valve: this stops the reverse flow (back surge) of gas
- Sintered Flame Filter: this blocks the flame
- Thermal Activated Cut-Off Valve: (fitted to regulator mounted models only). In case of a sustained (continuous) flashback or backfire, this valve will close and stop the flow of gas in any direction.
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