A full range of acetylene safety equipment

When using Acetylene, safety is essential. C₂H₂ is a highly flammable gas and the risk of explosion is high. To keep installations secure, the use of flashback arrestors is mandaroty, preventing any flame from returning to the gas sources.

Rotarex has developed a range of safety equipment designed for C₂H₂ production and filling plants. These include advanced flame arrestors for both high-pressure and low-pressure piping, engineered to stop a flame in either direction while avoiding excessive pressure build-up in the system. Built to the highest international standards, they provide reliable protection for operators, equipment, and infrastructure..

Explore the range today and give your operations the highest level of safety.

Specialty gas systems

Flashback arrestor

DF3L

High pressure safety device
Non-return valve
Fashback arrestor + Shut off
50HD

High pressure safety device
Fashback arrestor
Thermal shut-off device
10HD-N

High pressure safety device
Fashback arrestor
Shut-off device
DF10

High pressure shut off device
Shut off device
DF50

High pressure safety device
Thermal shut-off device

What is a flashback arrestor and how does it work?

A flashback arrestor is a safety device used in acetylene pipes to prevent flashbacks in the event of an accident. In high-risk environments such as filling stations or factories with long hose and pipeline networks, a flashback can cause catastrophic fires and damage. Installing arrestors at key points, such as manifolds, pipelines, and even directly on the cylinder connection, provides essential protection.

A flashback arrestor combines several features to ensure compliance and safety:

Quick-acting shut-off valve: Automatically stopping acetylene supply in case of decomposition, typically for high-pressure pipes.
Thermal shut-off device: Automatically closes the flow in both direction whenever a preset temperature is reached.
Non-return check valve: Prevents reverse flow of gas in the opposite direction to the normal supply.
Flame arrester: Acts as a barrier that blocks ignition and stops cutting flame propagation.

By combining these safety elements, flashback arrestors protect operators, cylinders, and installations handling oxygen and fuel gas mixtures used in welding and cutting processes.

What is a flashback arrestor and how does it work?

Where should flashback arrestors be installed?

Acetylene flashback arrestors are essential in industrial applications. In filling plants, workshops, or industrial piping systems, they act as the first line of defence: the device protects both operators and equipment by instantly preventing flame propagation or reverse gas flow.

A flashback arrestor is typically mounted at critical points, as directly on a single cylinder or cylinder bundle, on torch heads and at other connections, and of course on manifolds and distribution lines.

They can also be added as additional safeguards in complex piping networks.

Today, acetylene is widely used for numerous applications, such as:

Oxy propane or oxy acetylene welding and cutting
Cutting torch operations in construction and metalwork
Chemical synthesis and brazing processes

Do you really need flashback arrestors?

If you work with acetylene, using a flashback arrestor is an absolute necessity. Whether in production plants, filling stations, or industrial piping systems, flashback arrestors play a vital role in safety:

Preventing catastrophic chain reactions from acetylene decomposition
Stopping a flame or return valve incident before it reaches the supply source
Protecting your workers, your equipment, and your facilities from injury or explosion
Ensuring compliance with DIN EN ISO and international standards

By installing a gas safety device such as a flashback arrestor, you ensure your plant is protected at all times.

Standards and certifications for flashback arrestors

When handling acetylene in filling plants or large gas welding systems, only thoroughly tested and officially certified equipment can guarantee safe and reliable operation. Our advanced flashback arrestors are manufactured to meet the highest international regulatory requirements, combining decades of technical gases expertise with proven reliability and performance:

Approved by validation test according to EN ISO 15615
In full compliance with the PED 2014/68/EU directive
Specifically designed for C₂H₂ supply systems as defined in ISO 14114

With these certifications and rigorous quality controls, Rotarex flashback arrestors and regulator solutions combine durability, efficiency, and full conformity, making them a trusted and indispensable choice for demanding industrial environments worldwide.