ICAF SYSTEM DESCRIPTION & DESIGN
The ICAF SYSTEM is a deluge-type system that uses a balanced piping network and can be activated by electric, pneumatic or manual release. The system can be configured with multiple mixing chambers and can have multiple zones. Each system is designed and installed as per the current NFPA 11 standard. FIREFLEX® provides design assistance with respect to piping and nozzle layout, including hydro-pneumatic calculations as well as offers system start-up service including onsite discharge testing and commissioning.
The system water supply can be provided by a water pressure vessel or can be connected to a city fire main or fire pump system. The air supply is provided by high-pressure air cylinders that are factory assembled onto cylinder banks and include a high-pressure manifold and pressure regulator(s).
The foam concentrate is stored in a stainless steel pressure vessel. The foam concentrate tank and water supply tank, if applicable, are pressurized with compressed air upon system actuation.
Water, compressed air and foam concentrate are then injected into the mixing chamber(s) mounted in the cabinet. CAF is generated in the mixing chamber and then flows through the system’s piping network
towards the distribution nozzles.
CAF is discharged in or on the hazard using special discharge devices which effectively distribute the foam evenly over the nozzle’s area of coverage. In addition to coverage, the TAR and FPO nozzles are specifically designed to maintain CAF quality preventing degradation of the CAF generated in the mixing chamber.
ICAF SYSTEMS are factory assembled, tested in cabinets and include all hydraulic, pneumatic and electrical devices required for proper operation.
Enhanced system performance
Full-scale fire tests have demonstrated that ICAF is a very effective extinguishing mechanism for class B fires. The unique physical properties of ICAF foam with a 10:1 expansion ratio combined with long drain times provide improved extinguishing and burnback performance. Furthermore, its ability to stick to vertical surfaces enabled the ICAF to be Listed for cascading fires. System performance can be a deciding factor in critical applications where it is desirable that system performance exceeds the minimum requirements set out in published codes or standards.
Improved visibility in the hazard
In comparison to water-based systems, CAF’s unique physical properties significantly reduce steam production and thereby improve visibility during and after a fire. The CAF blankets the fuel surface and therefore does not cause visual impairment often associated to high-expansion, total flooding foam systems.