Dafo Forrex Fire Suppression Systems for Buses

Dafo Forrex Fire Suppression Systems for Buses
Address: Dafo Vehicle Fire Protection
Mediavägen 10
135 48 Tyresö
Phone: +46 10 1768 100 Connect: Website: View website Contact: Contact supplier View: View supplier Download: Download


Most bus fires start in engine compartments and surrounding areas. A tested and classified fire suppression system in combination with good fire detection, is the best first response in case of an emergency.

Dafo Forrex Fire Suppression System gets activated by heat detectors when the temperature reaches 180oC.

The Dafo system is developed to use worldwide in both cold and hot climate and designed after the new UNECE Regulation No UNECE R107 and the Swedish guideline SBF 128, which requires 3L extinguishing agent for 1m3 protected space.

It means, we leave nothing to chance, safety first! The Dafo system is designed to avoid false releases – one of many special qualities.

The liquid agent extinguishes fire in less than a second and effectively prevents re-ignition. A low pressure system demanding but modest space and that operates down to -50oC.

As the owner of a vehicle equipped with a Dafo Forrex Fire Suppression System, you have taken an important step in facing the fire problem. This flexible, fully automatic system detects and suppress fire in less than a second.

It’s totally independent of orientation while maintaining a 100% discharge of the agent. Emptying time approx. 20 sec.

Actuation is achieved through a linear heat detector wire which detects the fire in a really early stage. Means to manually release the system can be provided upon request. The agent is released through a pipe system with specially designed nozzles that effectively covers the protected areas and easily adjusts the amount of extinguishing agent.

Forrex Installation

Fire is indicated by a linear heat detector wire, that sends a signal to the actuator, which punctures the propellant gas cartridge and releases nitrogen to the agent container. That distributes the Forrex liquid to the nozzles through the pipe system. At the same time the alarm system is activated, an alarm horn in the bus and a light signal in the panel will warn the driver.

Personnel Security

The harmless extinguishing liquid and no pressure resting state represents no health risk to passengers or mechanics.

Benefits of Forrex:

  • Strong Cooling Effect
  • Film forming effect to prevent re-ignition
  • Pressure-less container (Personnel safety)
  • Freeze protected down to -50oC
  • Easy maintenance
  • Easy to clean up after discharge
  • Independent system
  • Non corrosive
  • Environment friendly


Once a year the system must be inspected and serviced by a Dafo trained and authorized service company. The service will be carried out according to the service manual and the service protocol. Every year normal service and every 10th extended service.

Forrex Guarantee

You have twelve months warranty from the installation date. Within this time, defects in material or manufacture of components delivered from Dafo give right to replacement free of charge.


The fire suppression system is approved in accordance with new international standard for fire suppression system in buses, UNECE Regulation No R107. The system is certified by TÜV, SBF, FM, Russian Law of Fire Safety no. 123F3. Dafo Forrex extinguishing agent is certified by the MPA, the SP Environment certificate, Lloyds Register (ICAO Level B) and CCC (China). Dafo Forrex Fire Suppression System is tested for EMC, vibration and temperature according to vehicle standards.

Safety and Requirements

According to increasing requirements, smoke detectors for toilets and luggage compartments are available for installation at the bus manufactory.


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