Benefits

Stops the pressure front and flame front.
Stops gas from back feeding into the system.
Prevents fire from being supported by gas.
Signal lever will show if the pressure sensitive cut-off has been activated; the lever is also used for resetting the flashback arrestor.

The Wilhelmsen Unitor W-66S Acetylene Flashback Arrestor is a safety device that prevents flashbacks from occurring during gas welding. Flashbacks can occur when a flame travels back through the hoses and into the regulator or cylinder, which can lead to an explosion or fire. The W-66S flashback arrestor works by interrupting the flow of gas if a flashback occurs, preventing the fire from spreading.

The W-66S flashback arrestor is made of high-quality materials and is designed to withstand the harsh conditions of gas welding. It is also easy to install and use. The W-66S flashback arrestor is a valuable safety device for anyone who uses gas welding equipment.

Note. For safety, we recommend annual testing and replacement of flashback arrestors every 5 years, in line with COSWP UK, OCIMF SIRE, and RIGHTSHIP RISQ requirements.

Features
BAM-certified and OCIMF/RIGHTSHIP-compliant
Pressure sensitive cut-off valve to prevent further gas supply after a flashback (activated by the pressure shock in front of the flashback) .
Temperature activated cut-off valve to prevent further gas supply in case of fire (activated if the temperature rises to approximately 100° C) .
Flame filter/arrestor to quench the flame front of a flashback or a burn back.
Non-return valve for preventing reverse flow of gases, thereby preventing a gas mixture from reaching pipelines or cylinders.
Resettable.
Marking of manufacturing date and serial number for traceability.