Low pressure relief valve: The relief valve is installed directly in the cylinder containing the extinguishingagent. Made of brass and nickel coating, with an internal actuation mechanismand a discharge port, it is also provided with a connection for filling.Use a pressure differential between the valve and the detector tube to startthe relief valve. When an increase in temperature is produced (110/120ºC),the detector tube melts producing an orifice that releases the pressure andtrips the valve due to the decrease in pressure allowing the extinguishingagent pass.

High pressure relief valve: Used when the system working pressure is high, installed in the auxiliarycylinder for dry nitrogen. In that element the three parts of the high pressuresystem are placed: detection tube, high pressure grid and the correspondingpart for low pressure.