11R94 - ESAB No. 40 Regulator Mount Flashback Arrestor

Industrial Safety and Compliance for Gas Regulation

The ESAB No. 40 Basic Flashback Arrestor represents a fundamental component in the safety architecture of industrial oxy-fuel cutting and welding systems. Designed to mitigate the risks associated with gas instability, this device is engineered to mount directly onto gas regulators, serving as the primary defense against the propagation of flames into the gas supply cylinders. In industrial environments where volatile gases are handled daily, the integrity of safety equipment is paramount. The No. 40 Basic model integrates two critical safety mechanisms: a flame arrestor and a non-return valve.

The core of the device features a sintered metal filter, precisely engineered to quench flames by dissipating heat below the ignition temperature of the gas mixture. This barrier effectively stops a flashback—a high-velocity flame front traveling back through the hose—before it can breach the regulator and reach the cylinder. Simultaneously, the integrated non-return valve (check valve) prevents the reverse flow of gases. Reverse flow can create dangerous gas mixtures in the hoses or regulators, which are a primary precursor to flashbacks. By ensuring flow travels in only one direction, the ESAB No. 40 drastically reduces the probability of such hazardous conditions arising.

Constructed from high-quality brass, the housing offers robust durability and resistance to the harsh conditions typical of fabrication shops and construction sites. The unit is designed for minimal flow restriction, ensuring that while safety is maximized, the operational efficiency of the downstream torch or cutting tool is not compromised. For MRO managers and safety officers, installing regulator-mounted arrestors like the ESAB No. 40 is a standard best practice to ensure compliance with occupational safety regulations and to protect both personnel and infrastructure from the catastrophic potential of gas cylinder explosions.