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I'd be very cautious about making that change.  Fyrquel L is a fluid specifically developed to meet the critical needs of certain steam turbine hydraulic control systems.  Additionally, in some machines it can be used as the main lubricant.

The fluid is primarily chosen/recommended for its excellent fire resistance.  I would not make a change to a mineral based fluid without a careful review of why the Fyrquel product was originally recommended.

RM
Last edited by Registered Member

It would be helpful if you define "degradation"-actual LOA data. In my experience the majority of EHC fluid issues are driven not by the fluid but by the environment. Water intrusion, wrong filter ratings, lack of temperature control etc. All too often plants replace their EHC fluid only to find out that they have not addressed the root cause of the lubricant "failure". With the side stream filters available today it is a rare occurrence where you can't restore your fluid to near new condition. EPRI has studied this issue extensively so if you have access to their material it is well worth the effort to read there recommended maintenance for EHC fluids. If you do decide on a change out be aware that there are suppliers out there that market their products as "fire resistant" when testing has proved otherwise.  

RM

Absent any LOA data it's hard to pass judgement. I would get Fyrquel involved and talk to one of the formulation engineers as opposed to a salesman. I say this because I've been following an EHC issue for sometime (not Fyrquel fluid) and my standard LOA criteria had it as marginal at best. After talking quite extensively to the product line engineer I found out that the fluid was in every aspect in the "normal" range for the fluid blend and time of service. Boilerplate LOA acceptance criteria needs to be validated for your specific application and fluid type. In the above instance I put off the rental of a filter skid and a scheduled fluid change by talking to the right people. Hope you have the same outcome as I did. 

RM

This is what the maker says...

What is the recommended way to remove water from your fluid? Phosphate ester is a heavier than water fluid and normally has very low miscibility with water which allows for good separation. The best way to remove gross water contamination is to use a โ€œwet vacuum cleanerโ€ to remove the water layer from the top of the fluid level in the reservoir. Removal of water which persists as a second phase but is not in sufficient quantities so as to be efficiently removed via the โ€˜vacuum cleanerโ€™ method can be removed by a coalescing filter. The best way to remove dissolved water content is by use of water absorbing filter media and using vacuum dehydration for larger fluid fill systems. Contact your Fyrquelยฎ Representative for a recommendation.

RM

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