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Reply to "EHC fyrquel"

Dear Sir
Filtration technologies such as Ion Exchange and Ion Charge Bonding can remove acids and dissolved metals including the impurities added from using Fuller's earth (Ca, Mg, Fe) or with those from using alumina type products (Na). Solid contamination can be removed with quality filtration which many EHC systems lack. Are you sure the impurities you are referring to are mechanical in nature and not from the acid removal filters? If the contaminants are Ca, Mg, Fe, or Na they are likely from the acid filters.

The issue of dissolved metal contamination in EHC fluid is common and can easily be addressed. I suggest that for Phosphate ester EHC fluids that contaminants in the form of dissolved metals be maintained <5ppm per element. Ideally no dissolved metals other than Phosphorous are desirable.
By removing dissolved metals you can prevent these contaminants from depositing on servo valves and related components. For more support please review our website http://www.cleanoil.com or contact me at pdufresne@cleanoil.com

Cheers!
Peter
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