0657-0078 - Victor FBHC-OR Oxygen Regulator Flashback Arrestor High Flow

Victor FBHC-OR High Flow Flashback Arrestor: Technical Overview

The Victor FBHC-OR (Part Number 0657-0078) is a premium safety device engineered for industrial oxy-fuel applications requiring high gas flow rates. This unit is a Regulator Mount Flashback Arrestor specifically calibrated and designed for Oxygen service. In the hierarchy of oxy-fuel safety equipment, the flashback arrestor is the critical barrier between the combustion zone and the high-pressure gas supply. The FBHC-OR is distinguished by its dual-functionality architecture, incorporating both a reverse flow check valve and a sintered metal flame arrestor within a single brass housing.

The primary function of the integrated check valve is to prevent the reverse flow of gases. In complex piping or hose setups, pressure imbalances can inadvertently force fuel gas back into the oxygen line (or vice versa), creating a volatile mixture within the regulator or cylinder. The check valve mechanically seals against this back-pressure. However, a check valve alone cannot stop a flame front. This is where the secondary function of the FBHC-OR becomes vital. The internal sintered stainless steel element acts as a heat sink, effectively quenching the flame of a flashback before it can pass through the device and reach the regulator. This prevents catastrophic equipment failure and cylinder explosions.

A defining characteristic of the FBHC series is its "High Flow" designation. Standard flashback arrestors can introduce significant flow restrictions, which may be negligible for light welding but are detrimental when using large multi-flame heating heads (rosebuds) or heavy-duty cutting tips. Flow restriction can lead to flame instability and tip starvation, which paradoxically increases the risk of backfires. The Victor FBHC-OR is engineered with large internal flow paths to minimize pressure drop, ensuring that heavy industry torches operate at peak efficiency while maintaining the highest safety standards. It is an essential component for any MRO safety protocol involving heavy-duty oxy-fuel cutting or heating.