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detexline 4V fire suppression system for road vehicles


Fire Suppression Systems for On-Road Vehicles

UNECE R107 Fire suppression system

Automatic Fire Suppression System for Buses, Coaches and Road Vehicles
Unece R-107 Certifed. Made in Germany - 10 years durability.

protecfire’s fire suppression system, the detexline 4V, is the most reliable, robust solution with an extraordinary longevity of 10 years.

This solution allows long-term savings and reliability. OEM and Retrofit.

detexline 4V fire suppression system for road vehicles

Buses | Trucks | Road Vehicles

bus fire protection systems R107

Automatic Fire Suppression Systems

UNECE R107 Fire suppression system
R 107 certification - fire suppression system for buses

Ownership Unique Advantages:

  • No pressure
  • No electricity
  • (nearly) maintenance-free
  • Ultrafast detection & extinguishing
  • Hybrid system (liquid/gas)
  • Works in all angles and positions
  • Short downtimes through maintenance on the spot (every 10 years)
  • Works in temperatures from -30 to 80 degrees celsius
  • R-107 Certification
  • KBA certified in Germany
  • Quality Made in Germany

No False Activations!

We design and produce special projects and OEM Systems

detexline protecfire - Fire suppression system for buses and coaches - R 107
bus fire suppression system R 107 - protecfire detexline 4v
fine spray nozzles protecfire
No false alarm fire detection
R107 vehicle fire protection system by protecfire

detexline®System components

  1. SPY thermo-pneumatic detector
  2. Fine Spray Nozzle Bar
  3. Non pressurized extinguishing container
  4.  detexline (extinguishing and detection pipping)
  5. Optical and acoustic alarm / test button
  6. Pressure Switch
electric bus fire suppression system with sectorization valve - protecfire

Directional valves for electric and hydrogen buses

Independent detection and extinguishing zones connected to the same extinguishing container:

  • Smaller extinguishing agent container
  • Independent detection
  • Independent extinguishing
  • Fully mechanical – No
  • Multiple zones and sub-zones
directional valve protecfire

Leading the way in electric buses fire suppression systems

Engine compartment fire extinguishing system

With the use of self-developed fine spray nozzles in combination with ultra-fast fire detection, protecfire is able to achieve optimal extinguishing results even without high-pressure technology. This allows emerging fires to be detected at a very early stage and the extinguishing process to be initiated as early as possible.
protecfire works with fine spray technology and the liquid extinguishing agent TiborRex Absolute (see data sheet), which is sprayed as fine droplets in the engine compartment with the extinguishing nozzles.
This ensures that the extinguishing medium absorbs large amounts of heat energy in the extinguishing process. The remaining extinguishing agent on the surfaces after the extinguishing process provides a lasting suffocating cover for the source of the fire. This optimally counteracts a possible re-ignition.

The protecfire fire extinguishing system does not need any external energy for its detection as well as for the extinguishing agent application. The system works one hundred percent self-sufficiently and is pressureless in the operating state.
Due to the very high quality standard in production, selection of materials and processing, the protecfire extinguishing system can be operated for up to 10 years without replacement of parts, depending on use and application.

From a thermal point of view, the engine compartment is not a homogeneous installation space. Different temperature zones require differentiated temperature detection.
Peak temperatures, which would still be tolerable in the vicinity of the exhaust system, can already represent a fire risk in the vicinity of electrical components.
Based on this knowledge, protecfire has created the possibility of using different temperatures in the engine compartment for practical detection. This range of possible triggering temperatures extends from 68° C to 110° C, 141° C, 182° C and 260° C.

Already in the development stage, protecfire pursued the constructive goal of combining components in an intelligent and innovative way. This idea resulted in the single line system for detection and extinguishing “detexline”.

By combining the detection and extinguishing line in one and the same line, material and assembly performance are noticeably simplified and costs are reduced.
The term detexline is derived from the abbreviation of the three words “detection”, “extinguishing” and “line” and thus summarizes the concept of the single line system for detection and extinguishing in terms of function and content.

UNECE R107 Fire suppression system

UNECE R-107 certified

certifications for protecfire fire suppression systems, products and company

Regulation for Fire Suppression Systems in Engine Compartments of Buses, Coaches:

This document includes a fire-testing procedure for fire suppression systems for engine compartments of buses and coaches and includes four tests extracted from SP Method 4912 (SP is a Technical Service for UNECE Regulation No. 107)

The requirements of fire suppression systems apply to: single-deck double-deck rigid or articulated vehicles Category M2 or M3 and specifically vehicles having a capacity exceeding 22 passengers in addition to the driver – “Class III”. Class III vehicles are constructed exclusively for the carriage of seated passengers, more commonly referred to as “coaches”.

Trustable and progressive engineering solutions

-30ºc to 80ºc

No Electricity


Low Maintenance

No Pressure

2 lines 

Fully Mechanical

Easy to Install

Stainless Steel

Super Robust

bus fire suppression system protecfire

Extremely compact !


  • 4 Lt System (smaller vehicles)
  • 7 Lt System (up to 4m3)
  • 14 Lt System
  • 24 Lt System
  • Multiple containers can be installed in 1 system
  • Sectorization possibility (battery compartment/engine) with different areas of detection and extinguishing.
spy thermo- pneumatic fire detection

SPY® - Thermo Pneumatic detection

  1. Simple, super-fast and reliable
  2. No false alarms.
  3. Multiple temperature range:
    57 ºC | 68 ºC | 79 ºC | 93 ºC | 110 ºC | 141 ºC | 182 ºC | 230 ºC | 260 ºC
  4. Sensitive to hidden fires
  5. Robust and Precise
  6. Stainless steel
    Ultra-Fast RTI 12 (Reaction Time)
fine spray fire suppression nozzle bar
fine spray fire suppression nozzle bar

Fine-Spray Nozzle Bars

  • Completely made of stainless steel
  • fastest way to install a fire suppression system in compartments.
  • Installation time was reduced by more than 50%.
  • up to 90º Angle Spray
  • A perfect fine spray for temperature reduction and penetration.

Directional Fine-Spray Nozzle

  • Completely made of stainless steel
  • Directional spherical nozzle with a K-factor of 1
  • Mist nozzle
  • Full cone spray pattern with 90º angle
  •  The nozzle is protected by a red cap 
K1 fine spray nozzle
fine spray nozzles for fire suppression

detex360® special nozzle

  • 360º spray (total flood)
  • Completely made of stainless steel
  • Easy to instal
  • Installation time was reduced by more than 90%.
  • A perfect fine spray for temperature reduction and penetration.
  • 1 piece combination with SPY detectors
pneumatic manual release for fire protection

Pneumatic manual release (Optional)

  • Very robust 
  • Up to 20 meters distance from the tank (or more with a booster)
  • Weather resistant
  • Easy to operate
  • Long lasting 
fire suppression system alarm button

Alarm / Test button (optional)​

  • System test function
  • Buzzer Alarm
  • Led warning light (green and red)
  • IP44 | 10–24 V DC | M 32 x 1.5 | Plastic
  • Easy to operate
  • Relay with potential-free contacts and a microcontroller
  • Time-delay shutdown for the engine with time extension by command
protecfire extinguishing tank


  • The Container is not under pressure
  • The system only gains pressure when activated
  • Hybrid Suppression: Liquid | Nitrogen
  • R.O.P. (Rise of Pressure) system
  • One single line for detection and extinguishing
  • Can be installed in any position

What is the detexline ®concept? One single pipeline network!

Unece R107 - sp 4912 fire suppression system for vehicles - protecfire

Avoiding the usual fuse plastic tube detection, there is only one path to the system work: stainless-steel or galvanized piping with pneumatic activation from the detection, followed by the liquid agent discharge by the same piping.

Patented technology!

detexline® by protecfire®, is a patented system that uses only one network of piping for detection and extinguishing.

  • Better value
  • Avoids malfunctions
  • Fastest to install
  • Easy to provide maintenance
  • Simple and reliable
  • No false alarms
  • Patented
  • No pressure | no pressure leak problems
  • No corrosion
  • Optional in galvanized steel or stainless steel
  • Simple, super-fast and reliable
  • No false alarms.
  • Patented
  • Multiple temperature range:
    57 ºC | 68 ºC | 79 ºC | 93 ºC | 110 ºC | 141 ºC | 182 ºC | 230 ºC | 260 ºC
  • Sensitive to hidden fires
  • Robust and Precise
  • Stainless steel
  • Ultra-Fast RTI 12 (Reaction Time)


Liquid Extinguishing Agent

TiboRex® Absolute Special Liquid Extinguish Agent

TiboRex Absolute is a ready-to-use liquid special extinguishing agent without the addition of fluorochemicals for the highly effective extinguishing of solid fires (fire class A), liquids, non-polar hydrocarbons (fire class B) and edible fats and oils. The special formulation, whose main components are also used as food additives, guarantees exceptional extinguishing performance with unprecedented environmental protection.

vehicle fire protection systems R-107

Fire suppression system functions and mode of operation:

The fire-suppression system is based on the principle of a fine spray extinguishing system. The protecfire nozzles spray the extinguishing agent TiboRex Absolute as very fine droplets. The extinguishing agent droplets wet, impregnated and cool the burning surfaces.
Through reflections and turbulence, the extinguishing agent also reaches adjacent areas, which enables the entire engine compartment to be protected.

– Unpressurised standby mode for improved safety: The fire-suppression system is not pressurized until it is triggered.
– Low maintenance: first regular component replacement after 5 years.
– Self-sustaining without external energy: protecfire suppression systems operate pneumatically-mechanically. This means that they do not require any additional power supply.
– Automatic and/or manual triggering: Automatic triggering is effected by fire detection elements. The fire-suppression system can also be triggered by a pneumatic manual release mechanism.

protecfire uses thermopneumatic fire detection elements to detect fire. These elements only trigger the fire-suppression system if a specified temperature is exceeded. Failure due to the failure of electrical components is thus ruled out.
Fire detection elements with different triggering temperatures can be used because the engine compartment is not a thermally homogeneous area, but contains different temperature zones.

The fire detection elements are connected to a combined control and extinguishing line, the detexline. When a fire detection element is heated to its trigger temperature, a mechanism opens the built-in argon propellant cartridge. This causes an increase in pressure in the line. The pressure increase opens an N2 propellant cartridge in the extinguishing agent container. The released propellant presses the extinguishing agent through the line to the extinguishing nozzles.

Technical Properties

Name detexline 4V – certification E1 107 R-080052
Working Temperature Range Standard -30ºC to 80ºC
Technology Rise of Pressure
Detection and External Line One Integrated 12Ø pipeline
System Pressure No Pressure
Detection Technology SPY detection elements
Trigger Temperature Glass ampoule, 9 independent temperatures: 57 ºC | 68 ºC | 79 ºC | 93 ºC | 110 ºC | 141 ºC | 182 ºC | 230 ºC | 260 ºC
Life of detectors 10 Years
Nozzle types S1 / K1
Extinguishing Agent Tiborex Absolute
Extinguishing Agent Volume 4L, 7L, 14L, 24L
Extinguishing Technology Fine Spray Technology
Extinguishing Container (pressure) Pressureless (welded / sealed cartridge inside)
Product Material Stainless Steel
Alarm Signal Switch Yes
Maintenance Inspection Annually according to manual
Parts Replacement Duration 10 Years
Kits available 4L, 7L, 14L, 24L
Cylinders Dimensions 7L: 150 Ø X 585 ±2  | 14L:200 Ø X 580,5 ±2 | 24L: 246 Ø ±2 X 654,5 ±4


The system is free of dangers and easy to install. It can be installed in any vehicle: Construction, mining, buses, mini-buses, vans, motorhomes, jeeps, racing cars, etc.
diesel, electric or gas

The thermal detectors are placed in the upper area of ​​the engine, in order to detect unusual heat accumulations, through temperatures previously chosen, normally our Kit for buses comes with 180ºC in the detection. In areas such as Park compartment, another lower temperature can be chosen, such as 130ºC. The dispersion nozzles are aimed at critical areas of the engine, such as turbo, exhaust, etc. This distribution makes point-to-point efficacy during extinction.

The system is applied in critical areas: engine compartment and park. It can also be applied to wheels and interiors. This system is modular and can be applied wherever desired.

TiboRex Absolute is a liquid extinguishing agent, in order to be safe and effective. Electrical components may be affected, but in any case they would be damaged by the onset of fire. All other equipment is never affected and subsequent cleaning is quick and easy. Other types of extinguishing agent (powder, gas, etc.) would not be as effective, as they can be expelled by the vehicle’s progress, not acting on fire.

No. Depending on the size and layout of the compartment. In the case of a bus engine, the job is done in about 3 hours maximum. The system is easy to assemble and also to disassemble.

No. Our system is accurate and detects temperatures with precision. Depending on the location where the thermal sensors are placed, a specific temperature is chosen only when the compartment reaches that exact temperature.

No. Our nozzles are designed to stay clean and unobstructed. Engine compartments are specifically designed, maintaining their effectiveness throughout their service life.