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[DocMartin]

Raphaël:
Thank you for your reply.  I asked solely because the modular design of that attenuator system is intriguing.  I have seen it in photos of other steam models and have been unable to find any information aside from the label printed in German.
DM

[KBIO]

Good evening !
I know that this assy was made in France and sold in Europe. Ludger in Germany was the one who proposed it in his father steam shop.
iI asked , he send the french operating sheet. As usual I lost mine... 
This assy was used in the industry for air regulation and connected to plastic lines to control some  instruments.
Now , it is not manufactured any more and it was designed for air use , but ... why not for gas ?
Concerning the compatibilty between metals , the brass and duralumin fit fairly well , the galvanic corrosion factor is acceptable. This is a lot different with the copper.
ref to the sheet I use :
But as I said before , I wonder if the corrosion is not rather due to the low ph of the boiling water.... Being not a specialist , I would appreciate some more and clearer explanations.

Cheers !

[KNO3]

These yellow aluminium gas attenuator combo units were made in Germany by Dieter Laspe and when he retired, by Ludger Keifler, for a short time.