[labnetwork] CDA and copper piping

[Michael Yakimov]

And while we’re at this… Any comments on oil in CDA? My understanding is that many actuators need some oil to keep seals actually sealing.  I had to get a few drops into system inlet of our big machine to keep it happy. Flip side of it is, apparently, that some oil may get into the air.
Maybe my information is outdated?  PTFE seals apparently should be able to work dry; and viton may work better than buna-N…

For those with  low dew point CDA – do you see any issues with seals in actuators?  Or I am still living in the past and this is not an issue any more?

Thanks

Mike





From: labnetwork <labnetwork-bounces at mtl.mit.edu> On Behalf Of Collins, Deon
Sent: Thursday, December 8, 2022 10:46
To: Denis, Kevin L. (GSFC-5530) <kevin.l.denis at nasa.gov>; labnetwork at mtl.mit.edu
Subject: Re: [labnetwork] CDA and copper piping

Our entire system is copper. There are standards depending on your needs. You should be using type L copper for Med Gas.  Silver soldered joints are a preferred method for Med Gas. The compressor, dehumidifier and filters play as large a role as the materials.

From: labnetwork <labnetwork-bounces at mtl.mit.edu<mailto:labnetwork-bounces at mtl.mit.edu>> On Behalf Of Denis, Kevin L. (GSFC-5530)
Sent: Wednesday, December 7, 2022 3:46 PM
To: labnetwork at mtl.mit.edu<mailto:labnetwork at mtl.mit.edu>
Subject: [labnetwork] CDA and copper piping

Hello All,
Has anyone used copper piping for clean dry air lines.  If not what kind of problems would one run into if going this route?  Thanks for any insight that can be provided.


Regards,
Kevin


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