The detexline 4V is Protecfire’s purpose-built automatic fire suppression system for buses, coaches, electric and hybrid fleets, and commercial road vehicles — fully certified to UNECE Regulation R-107 (E13), the European standard for fire protection in passenger transport. Built around our patented single-line detexline® technology, the 4V combines ultra-fast SPY® thermo-pneumatic detection, fine-spray nozzles and the powerful TiboRex Absolute extinguishing agent into one fully mechanical platform that operates with no electricity, no pressurised pipework and virtually no maintenance. Engineered to protect engine bays, battery compartments, auxiliary heaters and other high-risk zones, and operating reliably from −30 °C to +80 °C, the detexline 4V keeps drivers, passengers and vehicles safe across daily operations — delivering fast, certified, long-life protection trusted by transport operators worldwide.
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Independent Detection and Extinguishing Zones connected to the same extinguishing container:
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”.
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.
Every Raptor Powder system is made up of purpose-engineered components, each designed for durability, reliability, and fast installation. From detection to discharge, here’s what makes the system work.
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.
Learn how the Detex 4V fire suppression system detects, responds to, and suppresses fire — automatically, mechanically, and without the need for an external power supply.
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.
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 4MC |
| Working Temperature Range | Standard -30ºC to 80ºC / Optional -50ºC 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 |
| Life of detectors | 5 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 | 5 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.
Talk to our fire suppression specialists about the right Protecfire solution for your vehicles, machinery or facility. From system design and specification to installation and ongoing support, our team is here to help — wherever you are in the world.
