prBAS EN 17969:2027

This document is applicable to protective ventilation systems to provide breathing air to operator's stations on earth-moving machinery used in contaminated areas. Its purpose is to limit the exposure of the operator (driver) to hazardous agents when earth-moving machinery is used in contaminated areas. This document describes requirements, test procedures and information to be provided by the manufacturer of protective ventilation systems to provide breathing air to operator's stations on earthmoving machinery used in contaminated areas. This document gives requirements additional to the common safety requirements of EN 474-1:2022 "Earthmoving machinery - Safety - Part 1: General requirements" and to the machine specific parts of the EN 474:2022 series. This document does not repeat the requirements from the EN 474:2022 series but adds or replaces the requirements as applicable for Earth-moving machinery. This document does not cover: - the safety requirements to be used for any specific application; - the choice of the system for a specific application site; - the filter performance or the relevant filtration class for any particular application; - the choice of type of filter for a specific application; - the cab performance requirement when in-use; - the filter durability when in-use. This document is not applicable to protective ventilation systems which are manufactured before the date of its publication as an EN. For the list of significant hazards, see informative Annex A.