×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Water Treatment oxidizing Grease?

Water Treatment oxidizing Grease?

Water Treatment oxidizing Grease?

(OP)
I posted this in the Valve Engineering forum, but thought there might be insight here as well from the side of the water treatment.

I have some ball valves in my system that have started to exhibit higher torque requirements to actuate.  I took a couple apart to see what was going on, and noticed that the stem and O-rings seemed rather "dry".  The grease appeared to lose all it's lubricating qualities, although it was obvious that it was still there.

The manufacturer says the valves are made with a synthetic grease (Kluebersynth VR 69-252) and EPDM O-rings.  We used a sodium nitrite based corrosion inhibitor on the system.  Our medium is ethylene glycol/water (50/50).  

Is it possible one of these chemicals is reacting with the grease to cause this "drying out"?  Any suggestions for other types of grease?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources