All products fall under scope of BS EN 134:1998 "Respiratory protective devices. Nomenclature of components" (ICS 01.040.13, ICS 13.340.30)
Respiratory protective devices. Nomenclature of components (28 page(s), in English)
This Standard specifies a harmonized nomenclature for typical components of respiratory protective devices. It does not specify which or how many components are used and where they are located in the apparatus. The illustrations used are given as examples only for the identification of the different parts and the corresponding terms for facilitating the application. The definitions and terms used are given in EN 132 and EN 135. The terms are given in the three official CEN languages.