Regulated flow technology
The EnviroMist™ Local Protection System is based on innovative regulated flow technology that generates very fine water mist with advanced firefighting capabilities, rated to extinguish Class A, B, C and F fires
The firefighting effectiveness of water is directly proportional to its surface area that comes into contact with fire.
Due to the microscopic droplet size (55 – 75 μm) achieved with this technology, the surface area of the water is greatly increased (by about x 2000 when the droplet size is 65 μm) and still has enough kinetic energy to overcome fire convection currents.
EnviroMist™ extinguishes fire mainly by:
- Cooling (heat absorption)
- Oxygen displacement (inert gasses form as water expands at a ratio of 1750 to 1 when converting to steam)
- Attenuation of heat radiation (preventing fire from spreading to an un-ignited fuel surface)
EnviroMist™ Functioning Principles
The EnviroMist™ Local Protection System was designed in accordance with NFPA 750 (Standard on Water Mist Fire Protection Systems) as an alternative to other systems using halons, CO2 or other gases and substances harmful to the environment, as well as sprinkler or foam systems using large quantities of water.
Regulated flow technology is a low pressure, single fluid system (mixture of water and gas is provided through one pipeline), which uses water and pressurised nitrogen to create fine mist. As a result of automatic or manual activation the supply unit begins feeding the extinguishing medium to the piping.
The flow regulators placed inside the water cylinder(s) create a mixture of water and pressurised nitrogen in a pulse manner. The mixture travels from the cylinders to nozzles through piping and is forced through the atomising holes in each nozzle so hat the water streams collide, generating a dynamic stream of extinguishing mist.
The EnviroMist™ Local Protection System is mainly used in enclosed spaces and in temperatures above 5°C. Appropriately directed nozzles cover the entire surface of the protected object, or fill the room with mist (max 40m3).
The system discharge time is designed to be at least double the actual extinguishing time, as per NFPA standards. In accordance with NFPA 750 every system configured for the first time must undergo 1 :1 trials.