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Grease / Water Treatment Compatibilty

Grease / Water Treatment Compatibilty

Grease / Water Treatment Compatibilty

(OP)
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?

RE: Grease / Water Treatment Compatibilty

Yeckelch,
     try consulting the websites mentioned in Thread408-104579: maybe you'll find some information about the lubricants' chemical compatibilty...
Bye,    'NGL

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