User Manual

Fire Safety and security measures

Building Technologies A6V10283843_a_en

Fire Safety & Security Products 05.2010

Sinorix

CDT (Constant Discharge Technology) system is a one-of-the-kind inno-

vation introduced by Siemens. The CDT valve designed and patented by Siemens,

allows a constant and controlled pressure discharge of the inert gas. The constant

pressure limited to 60 bar ensures that the gas is discharged at a constant rate

during the entire flow time, eliminating pressure peaks in the room at the beginning

of the extinguishing process and minimizing potential damage to assets.

Fig. 46 Sinorix

CDT

Controlled gas discharge allows a reduction of overpressure flaps up to 70%, a key

aspect to be contemplated in tunnels, where discharging overpressure to the out-

side might be complex or costly. Gas discharge limited to a maximum of approxi-

mately 65 bar also allows manifolds and piping to be designed on a lower pressure

category, and pressure restrictors after the manifold are no longer necessary. This

improves the cost of piping installation significantly.

Sinorix

CDT N

is available in 300 bar storage cylinder pressure, which allows

excellent design flexibility and complex engineering lay-outs, for example allowing

distances up to 100 m between cylinder battery and protected room or big multi-

sector systems, where a singly cylinder battery would protect several fire risks. It

also guarantees a minimum nozzle pressure of 10 bar, assuring an ideal mixture

between extinguishing agent and atmospheric air and therefore to a fast and reli-

able extinguishing.

For all the above mentioned reasons, Sinorix

CDT N

is the ideal extin-

guishing solution for control rooms in tunnels.

Sinorix

is a non regulated technology that offers the same extinguishing effi-

ciency as the controlled gas discharge mentioned above, is also based on pure ni-

trogen and represents an excellent alternative solution for control rooms in tunnels.

Sinorix

is available with storage cylinder pressure of 200 or 300 bar.

4.4.4.2 Extinguishing systems based on water combined agent

For the fire protection concept of thermal risks like in transformer and generator

rooms, Siemens recommends the use of water combined solutions. The combina-

tion of Nitrogen and water mist efficiently puts the fire out avoiding re-ignition.

Nitrogen reduces the oxygen in the room, providing reliable and fast extinguishing

of the fire and water mist reduces the ambient temperature in the protected zone,

bringing effective prevention of re-ignition.