In contrast to conventional systems, the Automatic Purging Unit Series AFE70 only needs one solenoid valve. Through this valve, the evaluation unit is isolated from the pipe system in order to protect the evaluation unit against damage caused by the compressed air, but at the same time the valve is also used to introduce the compressed air into the pipe system. The thoughtful and patented design of the valve ensures completely unhindered air flow from the sensor pipe network through the purging unit to the evaluation unit of the smoke aspiration system.
The solenoid valve is actuated through a control board that is integrated into the housing. Thanks to the compact structure of the Automatic Purging Units Series AFE70 and the integration of all components in a housing, the extensive mechanical installations and electrical control devices required for conventional purging systems as well as the piping and cabling needed for this can be saved.