Chemring Metron - Leading the way in passenger and driver safety.
The expertise of two companies in fire protection continues to lead the way in passenger and
driver safety as bus manufacturers and operators face major legal and technological
Within the next two years all engine compartments on the estimated 900,000 buses and
coaches which carry passengers on Europe’s roads must be fitted with fire suppression
That will complete a new European Union safety requirement, which started in 2017, when it
became mandatory for manufacturers to install fire safety devices on all new buses and
However, the legislation only applies to vehicles powered by internal combustion engines
and not the increasing number that run on battery or are hybrid. They pose a very different
risk, with outbreaks potentially occurring at a number of sections rather than just the engine
compartment, which is the most likely source of a fire on a traditional bus or coach.
Dafo, which was founded in Sweden in 1919, has been working with Chemring Energetics
UK (CEUK) for the past 20 years. CEUK, based in Scotland, supplies the vital component –
called a Metron – which immediately activates Dafo Vehicle Fire Protection’s (Dafo VFP)
extinguishment system when fire is detected.
Despite being just a few centimetres long, Metrons generate incredible and immediate
energy when the non-hazardous pyrotechnic materials they contain undergo a rapid
expansion within milliseconds of receiving an electrical impulse. Metrons have an
impeccable record of reliability which is why they are used by companies – like Dafo – where
lives depend on the rapid reaction and performance of its safety systems.
Metrons are also used as part of fire suppressant devices in numerous nuclear power
stations, galleys on ships and F1 cars.
“We need to know that our systems will work as and when they are required,” said xxxxx
xxxxx of Dafo VFP. “That’s why we have an enduring relationship with Chemring.”
CEUK already supplies xxxx Metrons to Dafo each year, and – after major investment at its
production plant – has the capacity and capability to increase the number of Metrons it
makes for Dafo, and its other customers who operate in such diverse sectors as marine
safety, aerospace and conservation.
Metrons produced for Dafo will continue to be used in its fire suppressant systems on buses
and coaches powered by fossil fuels as well as the new generation of electric/hybrid
vehicles. (I am presuming the second half of this sentence is true)
Dafo VFP is at the forefront of research into dealing with fire hazards on vehicles that use
Lithium-ion batteries and has developed a system called FORREX which provides a multi-
zone fire protection solution.
“The benefit of the Metron is that its function and performance is guaranteed however much
the technology around it is changing,” said Mikhael Dzagoev of CEUK.
“It plays an essential role in so many emergency situations where there is no time for a
second go. A Metron really is the difference between life and death.”