Experts in fire protection

Advantages

The Oxeo Prevent oxygen reduction system reduces the oxygen content in the air by the controlled supply of nitrogen to the protected area in order to create a "fire-proof" atmosphere and maintains this level permanently. This prevents the outbreak of an open fire. Oxeo Prevent generates the nitrogen used to reduce the oxygen on site by means of a nitrogen generator. The protected areas can still be entered by unimpaired individuals.

  • Prevents fire from occurring
  • Damage is limited to the defective component
  • Ensures availability of technical equipment and processes
  • No smoke-related damage
  • The Oxeo Prevent system avoids the possible side-effects of normal fire extinguishing methods: rapid temperature changes in specific spots, electric short-circuits, extinguishing agent residue

Design and function

Components

The main components of the Oxeo Prevent fire prevention system are an air compressor, a compressed air conditioner, a nitrogen generator and oxygen sensors with a monitoring and control panel. To achieve effective fire prevention through the reduction of oxygen, the individual components must interact as follows:

Sensors continuously measure the oxygen level of the air in the protected area. The supply of nitrogen is adjusted by a valve that is regulated by the monitoring and control unit. Once the required level of nitrogen is reached, the Oxeo Prevent fire prevention system automatically switches to stand-by operation.

It only recommences if the oxygen level begins to rise, e.g. through unsealed points in the building or open doors and gates.

Air compressor

The air compressor sucks in normal air and compresses the air up to 13 bar, depending on the application. In the compressed air conditioning unit, the compressed air is cleared of dirt particles, moisture and residual oil to ensure a long life for the nitrogen generator.

Nitrogen generator

In the nitrogen generator (membrane or PSA technology), the compressed air is separated into its main constituents, nitrogen (78.0%) and residual gases (22.0%). While the remaining gases are released, the nitrogen replaces part of the room atmosphere in the protected area, thus reducing the proportion of oxygen to below that required for combustion. In most cases a reduction from 21% to 15% by volume is sufficient to prevent the occurrence of fire.

Protected areas

Archives

Protection zone

Archives house documents and information in the form of paper files or data carriers. Shelving bays or mobile storage racks make for transparent storage and as needed for quick access to specific information. The ceiling height is typically used to the limit.

Risks

  • Technical defects in devices such as the motors of electric mobile storage racks
  • Overheating of ceiling lighting
  • Highly flammable materials

Fire Protection

Sprinkler systems installed for the overall protection of the building typically provide the necessary safety in archives. The use of Preaction sprinklers prevents an unintentional triggering of the extinguishing system caused by accidental damage to a sprinkler. Oxeo inert gas extinguishing systems completely exclude water damage to archived materials. They are also an optimal solution if the distance between the upper edge of the shelves and the ceiling is too narrow for sprinklers. Oxeo extinguishing systems are triggered by a fire detection system using HELIOS AMX5000 aspirating smoke detectors.

Electric & control rooms

Protection zone

Control rooms are very sensitive and high-quality facilities which control fundamental production processes. They contain electric switching and control equipment plus false floors with extensive cabling. Even minor defects may cause substantial operational failures.

Risks

  • Short circuits
  • Highly flammable materials

Fire Protection

Oxeo inert gas extinguishing systems offer reliable protection in control rooms. For smaller control rooms, MX 1230 extinguishing systems offer an economical alternative. The extinguishing system is triggered by a fire detection system using punctiform smoke detectors or HELIOS AMX5000 aspirating smoke detectors.

Refrigerated storage

Protection zone

Refrigerated storage is widespread especially in the food industry and in the related, downstream commercial operations. The goods and products are stored for purpose at temperatures of up to -40 °C. The necessary heat insulation often consists of non-flammable or flammable insulation materials with varying fire performance, often in the form of sandwich elements. Rack storage is predominant in refrigerated storage facilities

Risks

  • Dry air promotes the rapid spread of fire
  • Additional fire loads when using flammable insulation material
  • Extinguishing water without antifreeze additives will freeze over very quickly.

Fire Protection

Oxeo Prevent fire prevention systems are the ideal solution for refrigerated storage facilities, since the conditions for their use — no permanent presence of people in the storage facility, a well-sealed building shell and very low infiltration of fresh air caused by bringing in and removing goods — are also required to maintain the desired temperature level. Moreover, they offer perfect protection for the storage of foodstuff that is sensitive to smoke and temperatures. Oxeo Prevent fire prevention systems are mostly used in combination with HELIOS AMX5000 aspirating smoke detectors with a highly sensitive setting to ensure earliest fire detection. Heated aspirating outlets ensure their proper operation in refrigerated areas. Though Oxeo Prevent can only prevent a smoldering fire from turning into an open fire, the fire and the cause of fire would remain permanently undetected in the absence of an earliest fire detection system. Alternatively, sprinkler systems can be installed in such conditions — here ideally fitted with ESFR sprinklers. If there is a sufficiently spaced, frost-free intermediate area above the ceiling available, we recommend pendent Viking ESFR dry sprinklers. Combined with a Minimax PipeGuard Antifreeze system, sprinkler systems can be used in refrigerated storage facilities at a temperature of up to -40 °C.

Server rooms

Protection zone

Server rooms are important, sensitive areas. In these rooms, data of high importance for business operations is stored, managed and exchanged over the network. The irretrievable loss of this data through a fire may have considerable economic consequences for productivity or even the future of a company.

Risks

  • Overheating of technical equipment
  • Defects such as short circuits
  • Considerable damage even in the case of small fires

Fire Protection

For small and medium-sized server rooms, the MX 1230 extinguishing system is the ideal solution. It gives residue-free extinguishing using the innovative Novec™ 1230 extinguishing agents and requires very little space. Oxeo inert gas extinguishing systems are ideal for large server rooms. The MX 1230 extinguishing system and Oxeo inert gas extinguishing systems are triggered, and fires are detected, by a fire detection system using a HELIOS AMX5000 smoke aspirating system.

Storage of hazardous substances

Protection zone

Hazardous substances are materials or mixtures that are explosive, combustible or harmful to human health or the environment. Warehouses where such substances are stored have a great variety of typical designs, subject, however, to specific laws and regulations applicable to their construction. Such provisions require e.g., fall-safe storage, soil protection in the form of collecting reservoirs and extinguishing water retention systems as well as the prevention of operational sources of ignition.

Risks

  • Rapid spread of fire
  • Devastating effects of fire on people and the environment

Fire Protection

As a rule, the planned fire protection system for hazardous substance storage is determined in particular by the characteristics of the stored goods. Accordingly, nearly the full range of fire extinguishing systems is used in such facilities. For this type of storage, Oxeo inert gas extinguishing systems are often the preferred solution: they extinguish fires quickly without leaving residue, and reactions between the burnt materials and extinguishing agents are precluded. Alternatives are Oxeo Prevent oxygen reduction systems or foam extinguishing systems. A fire detection system triggers Oxeo inert gas extinguishing systems and Oxeo Prevent oxygen reduction systems. UniVario flame and heat detectors are used for detection purposes.

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