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Protect regulators and gas cylinder against flashback.
Maritime authorities, such as the Norwegian Maritime Directorate, require the installation of flashback arrestors for acetylene and oxygen, as incorrect maintenance or use of gas welding equipment may cause flashbacks of various types.
Normally these will stop in a well designed torch, and are only noticed as a popping sound in the torch. However, faulty handling, maintenance or gas pressure setting may lead to a penetrating flashback. This means that the gas flame passes back through the hose(s). In some cases it may also pass the regulator and ultimately reach the cylinder.
The flashback arrestors supplied by Unitor are designed for use both with gas cylinders and gas outlet stations and incorporate several safety functions:
Non-return valve preventing reverse flow of gases, thereby preventing a gas mixture from reaching pipelines or cylinders
Flame filter to quench the flame front of a flashback or a burnback
Temperature activated cut-off to prevent further gas supply in case of fire (activated if the temperature rises to approximately 100° C).
Pressure activated cut-off to prevent further gas supply after a flashback (activated by the pressure shock in front of the flashback).
Indicator ring showing that the pressure activated cut-off has been activated; the ring is also used for resetting the flashback arrestor
The flashback arrestors are build Conform to: EN 730/ISO 5175 and with BAM Certification no.: ZBF/009/12
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