A flame arrestor (also spelled arrester) is a device that stops fuel combustion by extinguishing the flame. It allows gas and vapor to pass through but stops a flame in order to prevent a larger fire or explosion. There is an enormous variety of situations in which flame arrestors can be applied to decrease risk and improve the safety aspects. For example they can be used in fuel storage tank vents and fuel gas pipelines.
The products are usually divided into detonation and deflagration flame arrestors. Basically, the difference in the construction of the two devices has to do with the speed of the flame front that can develop inside the pipe. Any flame front that is traveling faster than the speed of sound is said to be a detonation while anything slower is termed a deflagration.
Cashco Inc. flame arrestors
Detonation In line flame arrestor – Cashco model 7A00
Deflagration In line flame arrestor – Cashco model 6A00
Deflagration End of line flame arrestor – Cashco model 6E00