As bombas KNF são extremamente silenciosas, construídas com os materiais da mais alta qualidade, são livres de óleo e não precisam de manutenção. Sua fabrica fica situada na Alemanha onde a mesma mantêm um centro de pesquisa e desenvolvimento fabricando bombas de vácuo desde 1946 sempre incorporando as mais recentes tecnologias.

O modelo N840.3 possui os diafragmas recobertos em Teflon® e cabeçote duplos também inteiramente usinados em Teflon®, suportando o trabalho com produtos químicos altamente corrosivos, sejam eles ácidos, alcalinos ou solventes. O modelo N840.3 ainda possui tecnologia patenteada, que impede a entrada de gases no motor da bomba. Seu motor possui tamanho compacto, resultando em bombas de tamanho e peso reduzidos, extremamente silenciosas e quase sem vibrações.

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