Glossary entry (derived from question below)
English term or phrase:
atmosphere supplying respirator
Portuguese translation:
aparelho respirador de ar ambiente
English term
Brazil
Engineer plus 22 years of translations
Native in: Portuguese (Variant: Brazilian) 
Works in: English to Portuguese, Portuguese to English
atmosphere supplying respirator
Respiratory Protection: None required under normal use. If exposure is expected to exceed occupational exposure limits, use a NIOSHN approved respirator to prevent overexposure. In accordance with 29 CFR 1910.134, use either an ***atmosphere supplying respirator*** or an air-purifying respirator for organic vapors and particulates
Encontrei a definição:
Respirator that supplies the respirator user with breathing air from a source independent of the ambient atmosphere, and includes supplied-air respirators (SAR) and self-contained breathing apparatus (SCBA) units
Jan 31, 2018 17:10: Mauro Lando Created KOG entry
Proposed translations
Brazil
Former interpreter for the EU, Brussels
Native in: Portuguese (Variant: Brazilian)
Works in: English to Portuguese, French to Portuguese, Spanish to Portuguese, and 3 more.
aparelho respirador de ar ambiente
respirador supridor de ar (com linha de ar)
Brazil
32 years engineering/law/contracts
Native in: English (Variant: US) , Portuguese (Variant: Brazilian) 
Works in: English to Portuguese, Portuguese to English
máscara de gás filtrante
Ela pode ser filtrante (apenas filtra o ar da atmosfera) ou isolante (com tanque de oxigênio conectado).
https://www.google.com.br/search?q=máscara de gás&um=1&clien...
Mexico
Apps, Metallurgy, Production and Lean
Native in: Portuguese
Works in: English to Portuguese, Spanish to Portuguese, English to Spanish
respirador com fornecimento de ar
Ukraine
Quod quisquis norit in hoc se exerceat
Native in: Russian (Variant: Standard-Russia) , Ukrainian (Variant: Standard-Ukraine)
Works in: English to Russian, Spanish to Russian, Portuguese to Russian, and 5 more.
máscara autônoma (de circuito fechado)
http://pregaoeletronico.cesp.com.br/licita\dv_int.nsf/4.2.V/...$File/Cat%C3%A1logo%20-%20M%C3%A1scara%20Aut%C3%B4noma%20MSA%20BD2100%20%28A%20solu%C3%A7%C3%A3o%20econ%C3%B4mica%20e%20confi%C3%A1vel%20em%20equipamentos%20aut%C3%B4nomo%29.pdf
http://www.ibrbrasil.ind.br/mascara-autonoma
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