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Reply to "Fyrquel"

It would be fluid in very very poor shape to form “powerful acids”. Typically they are weak acids. In any case it is not acidic components that soften seals but phosphate esters are good solvents. You have to use the right seals and paints. Many elastomers are compatible with the triaryl phosphate esters used as EHC such as Viton, EP, EPCDM, butyl, nylon, etc. But do not use Buna-N or butyl rubber as are often used with mineral oil. For your info EP and EPDM should not be used with mineral oil so and again it is not acids but a material effect.



To avoid problems, make sure that you are using the current recommendations from the equipment OEM and from the fluid manufacturers. With the right maintenance, right fluid make-up, correct reservoir design and proper operation the fluid should be trouble free and last decades. Use an acid number of 0.1 mgKOH/g as a maximum, and keep the water content <500 ppm, and the PC < 18/15/12. Training is key.





All the best,

Ken Brown, PEng, MASc, STLE, CLS

Utility Service Associates

Cell 416 458-4189
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