Oil sealing material (liquid) performance testing assessment

Rubber seal oil (liquid) performance, generally using standard test oil, according to test standard temperature conditions and the test time was immersed, through the comparison test values ​​before and after immersion (such as material hardness change, tensile strength change rate, elongation change rate, volume change rate, compression, etc.), evaluation  Hydraulic tube fittings of its performance. Standard Oil is "Low volume increased oil", a mixture of mineral oil by the solvent extraction composition, by chemical treatment, dewaxed paraffinic residues and neutral oil; Standard Oil is a "high volume increased oil", selected by a naphthenic crude product obtained after vacuum distillation of oil composition two different uses of the material is not the same evaluation index value.