Fig. 1 : advantage of high pressure nozzle

CerberusŪ FM200
The better extinguishing performance due to high pressure technology

The faster extinguishing effect of CerberusŪ FM200 as compared with conventional low pressure FM200 systems is achieved solely by means of the high-pressure technology which the Siemens Cerberus Division developed for Halon 1301.

By high-pressure technology, we understand a minimum operating pressure at the nozzle of 10 bar as well as an FM200 storage pressure of 42 bar. Both high-pressure criteria together are vital for the rapid and reliable extinguishing of a fire with FM200 :

• Rapid release of FM200 in the extinguishing sector.

• Total vaporization aIready during flooding.

• Perfect homogenization before flooding is completed.

Only when all three of these criteria are completely fulfilled is the FM200 gas available immediately after flooding in each part of the extinguishing sector in the required extinguishing concentration to extinguish a fire reliably in the shortest possible time.The results of numerous extinguishing tests in our laboratories have shown that as a rule, a fire can be extinguished in less than 30 seconds after the system has been actuated.

Table 1 : Distance travelled by FM200 high and low pressure droplets
The average size droplet is calculated on the basis of the resulting spectrum

Minimum operating pressure of 10 bar at the nozzle
FM200 is transported in liquid form to the nozzles in the extinguishing sector where FM200 is atomized. Energy is required for vaporization and must be supplied to the droplets. As fig. 1 shows, the ambient air is drawn into the FM200 droplets / nitrogen jet which provides the necessary energy for vaporization.

On account of the distinctly higher impetus of the jet at a higher operating pressure at the nozzle, with conventional low-pressure systems, less energy is transported for droplet vaporization in the jet, although more energy is required for rapid vaporization of the larger FM200 droplets (see fig. 1).The droplet size, arising from atomization of FM200, decreases with increasing operating pressure at the nozzle.

With simple thermodynamic calculations, it is possible to work out the life of an FM200 droplet expressed as the distance travelled in metres as a function of the operating pressure at the nozzle (see Table 1).

The results presented in Table 1, clearly show that only at a minimum operating pressure of 10 bar is an FM200 droplet completely vaporized before it can collide with any object in the extinguishing sector. For this reason, with a high-pressure system, a delay until all the FM200 is totally vaporized under unfavourable thermodynamic conditions upon completion of the flooding process, is impossible.

FM200 storage pressure of 42 bar
The CerberusŪ FM200 high-pressure technology guarantees that for each kilogram of stored FM200, more nitrogen propelIant is available with which even with larger and more complex applications, the maximum filling factors can be realized (see fig. 2) by comparison with conventional systems and so optimizes the ratio of hardware required to each stored kilogram of FM200.

While nitrogen in the cylinder head via the FM200 liquid surface serves to fill the pipe network with liquid FM200 and to initiate atomization at the nozzle, the nitrogen dissolved in the FM200, which sustains the flooding of FM200 in the extinguishing sector, is crucial.

Filling factor dimension : kg FM200 per liter cylinder volume

 
Because of the rapid vaporization, the high pressure system able to achieve shorter extinguishing time compare to low pressure system, therefore the hydrogen fluoride (HF) normally generated by halocarbon agents in the presence of a fire is negligible for high pressure system.

Electromagnetic Actuator
It allows to trigger one or all cylinder following an electrical command issued by an extinguishing panel. Code: 070789 Material: Brass Working Voltage: 24 volts Power Consumption: 3.5 Watts Rating: Eexd IIC TC Weight: 1.5kg
Pyrotechnic Actuator
Comprise of two ignitors. When activated causes expansion of gas due to combustion of chemical, which actuates the piston Pin. It is very reliable and no maintenance is required. Code: 070737 Material: Brass Electrical Resistance: 2 Weight: 0.09kg
Manual Actuator
After removing the safety pin, pulling the lever will push the piston pin to open the valve. Code: 070005 Material: Brass Weight: 0.16kg
Manual Actuator with Adapter
Similar to manual actuator but having the alternative to connect pyrotechnic actuator or to a pneumatic line. Code: 070793 Material: Brass Weight: 0.5kg
Pneumatic Adapter
It operates the valve by means of the pressure which supply through the tripping port. Code: 070006 Material: Brass Tripping Pressure: 6 bar Tripping Port: 1/8" NPT Weight: 0.09kg
Trip Block
It consists of a punch valve plug and may be fitted with electromagnetic, pyrotechnic, and Manual Actuator. Code: 070322 Material: Brass Connection Thread: 1/4" NPT to Valve body Tripping outlet Port: 1/8" NPT Weight: 0.13kg
Nozzles
The Nozzles have an intergrated hex nut and internal pipe thread. Code: 0707XX Material: Brass Size: 3/8" to 1-1/4" Coverage: 180 and 360 Weight: 0.4kg to 1.0kg
Selector Valve
During design for several extinguishing zone that require protection by one bank of cylinders, a selector valve can be installed to activate to one of dedicated fire zone. The valves will activate the pilot cylinder or master cylinder. By using the selector valve will reduce the number of cylinders. Code: 07009X Material: Brass and Steel Size: 3/4" to 4" Operation: Pneumatic and Manual
Connection Hose
One end is to be connected on valve outlet and the other end to be screwed in the checkvalve of the manifold. Code: 070778 Material: Teflon with Stainless Steel braided covering Test Pressure: 60 bar Minimum Radius: 125mm Internal Diameter: 30mm Weight: 1.4kg
Check Valve
It allows the gas to go through the cylinder to the piping network, but not reversely. Code: 070777 Material: Brass Opening Pressure: 1 bar Weight: 1.4kg
Label Entrance
This label is to be displayed at entrances to protected areas with FM200. Code: L070000 Material: Aluminium Size: 210mm x 210mm Weight: 0.2kg
Cylinder
Made by forged Steel, with no welds, confirm to DOT 3AA Code: L070776, L0707758 & L070779 Cylinder Capacity: 68, 32 & 17.5 liter Cylinder Height with Valve: 1.70, 1.17 & 1.14 meter Cylinder Diameter: 267, 229 & 168mm Empty Cylinder Weight: 88, 53 & 25.5kg Test Pressure: 250 bar

Total flooding systems

Total flooding systems extinguish fires by rapidly supplying an enclosed volume with enough FM200 to create an atmosphere that is incapable of supporting combustion.

The systems is completely effective even in spaces with a limited amount of open area. By filling the entire space fire cannot exist on the floor, on the ceiling or at any level in between.

Not matter how severe the flames may be they are normally extinguished in less than 30 second upon discharge.

Approval

Underwriters Laboratories (UL) APSAD, Vds, Hong Kong FSD, CNPP, European Authorities, BOMBA