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WHAT IS A FLAME OR FLASHBACK ARRESTOR? HOW IT WORKS
Flashback arrestors are also known as Flash arrestor. It is a gas safety device. It is a device used in welding and cutting to stop the reverse flow of gas as well as flash back into the supplier’s line. This device protects the user and the equipment from any damage or from getting the gas cylinder exploded. Flashback arrestors are found in the market in different sizes and flow rate. In earlier days wet flashback arrestors were used, but now a days mainly dry flashback arrestors are used in the industries.
When a flammable mixture of fuel gas and oxygen or air is present in a gas line upstream of a welding or cutting blowpipe, flame can travel backwards in the form of flash back into the gas line, and there is the possibility of a serious accident.
A flashback arrestor is a safety device designed to stop a flame in its tracks. It is therefore used to prevent flashback into cylinders or pipework. click to watch this video - https://www.youtube.com/watch?v=JObaMblT8Bs
A flashback arrestor should not be confused with a non-return valve, which has no particular flame stopping properties. A non-return valve can reduce the probability of a flashback, as it serves to prevent reverse flow of oxygen into fuel lines and fuel into oxygen lines. The flame arrestor usually contains an element which may consist of narrow passages through a sintered component or metal foam.
When a flame enters the element, it is quickly cooled by the surface of the element and the flame is extinguished. The flame arrestor may contain a pressure or temperature actuated cut-off valve and may then be known as a flashback arrestor. It is highly advisable to fit them to the oxygen outlet, and other fuel gas outlets.
https://in.messer-cutting.com/products/oxyfuel-technology/oxyfuel-technology/safety-devices
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