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Welding Flashback Arrestors

High-performance Flashback Arrestors with non-return valve, sintered filter and thermal cut-off. Welding flashback arrestor models available, free UK delivery over £100.

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  1. Hi-LO Hilo Ds200 Oxygen Resettable Fba Hl070311
    In Stock In stock

    Hi-LO Hilo Ds200 Oxygen Resettable Fba Hl070311

    SKU: H01/HL070311
    £98.99 £82.49
    - +
  2. Hi-LO Hilo Ds200 Fuel Gas Resettable Fba 070312
    In Stock In stock

    Hi-LO Hilo Ds200 Fuel Gas Resettable Fba 070312

    SKU: H01/HL070312
    £98.98 £82.48
    - +
  3. Hi-LO Hi-Lo Dg Flashback Arrestor Oxygen 070321
    In Stock In stock

    Hi-LO Hi-Lo Dg Flashback Arrestor Oxygen 070321

    SKU: H01/HL070301
    £19.56 £16.30
    - +
  4. Hi-LO Hi-Lo Dg Flashback Arrestor Fuel Gas 070322
    In Stock In stock

    Hi-LO Hi-Lo Dg Flashback Arrestor Fuel Gas 070322

    SKU: H01/HL070302
    £19.56 £16.30
    - +

Flashback Arrestors serve as a final defence against upstream flame propagation when a hose or nozzle momentarily flashes back. The sintered filter extinguishes the flame kernel, the spring-loaded non-return valve halts reverse gas motion and the temperature cut-off seals the line if metal temperature rises above 100 °C. This three-step safety barrier meets ISO 5175-1 endurance impact tests, ensuring your welding flashback arrestor remains functional after being dropped or subjected to vibration.  

Oxygen flashback arrestors are nickel-plated for corrosion resistance, while fuel-gas bodies retain bare brass to avoid catalytic ignition. Maximum flow capacity surpasses 15 Nm³/h on acetylene and 20 Nm³/h on oxygen—ample for multi-nozzle cutting torches. Compact torch-mounted flashback arrestor units weigh under 55 g, preventing wrist fatigue, whereas regulator-mounted flashback arrestors feature 5⁄8 BSP ports for heavy-duty hose sets.  

Each device is individually serial-numbered with date stamping to support annual inspection protocols required under workplace safety regulations. Pressure-drop graphs supplied in the box guide engineers when selecting flashback arrestors for long hose runs. Orders above £100 qualify for free mainland UK delivery with same-day dispatch.

Frequently Asked Questions
How does flashback arrestor work?
A flashback arrestor prevents flames from travelling back into gas supply lines. It contains a flame trap and a non-return valve. If a flashback occurs, the flame is extinguished by the trap, while the valve stops gas from flowing back, ensuring safety.
How many flashback arrestors in a gas cutting set?
In a typical gas cutting set, you should have two flashback arrestors: one for the oxygen line and one for the acetylene line. These devices are essential for preventing dangerous flashbacks and ensuring safe operation during cutting tasks.
How much are stick welders?
Stick welders in the UK typically range from £100 to £1,500, depending on the brand, features, and power output. Entry-level models are more affordable, while professional-grade machines offer advanced capabilities and durability.
How often should flashback arrestors be replaced?
Flashback arrestors should be replaced at least every 12 months, or sooner if they show signs of damage or after any incident involving a flashback. Regular checks are essential to ensure safety and compliance with regulations. Always follow manufacturer guidelines.
How to use flashback arrestor?
To use a flashback arrestor, connect it securely to the gas cylinder and the regulator. Ensure the flow direction is correct, indicated by arrows. Regularly check for leaks using soapy water. Always follow safety guidelines and manufacturer instructions for optimal protection.
What are flashback arrestors?
Flashback arrestors are safety devices used in welding and cutting processes to prevent flames from travelling back into gas supply hoses. They contain a flame trap and a non-return valve, ensuring that any flashback is contained, enhancing safety during operations.
What is a flashback in welding?
A flashback in welding occurs when the flame travels back into the torch or gas supply line, potentially causing a dangerous situation. It can result from improper gas flow, faulty equipment, or incorrect usage. Proper maintenance and safety measures are essential to prevent it.
Where does the flashback arrestor go in a gas cutting set?
In a gas cutting set, the flashback arrestor should be installed on the torch and the gas supply line. This ensures that any flashback is contained before it can travel back into the gas cylinder, providing essential safety during cutting operations.
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