licationExampesDataAppli/ll AppcationExampesDataHydraulic oilTypes of Hydraulic Oil and Compatible Packing MaterialsCompatibility with Water-Glycol Hydraulic Fluid● Hydraulic oil is a fluid used in the hydraulic equipment as a power transfer medium. It also works for lubrication, rustproof, and cooling. In order to take full advantage of the hydraulic equipment functions, it is important to select an appropriate hydraulic oil and to handle it properly. In addition, if the relief valve is operated continuously, or if the hydraulic oil temperature exceeds 60 °C due to the frequent use of the pump, it is necessary to keep an appropriate temperature using an oil cooler.● In some cases, it is necessary to use a flame-retardant hydraulic oil instead of a general hydraulic oil depending on the ambient conditions. If a flame-retardant hydraulic oil is used, the packing material must be changed according to the type of hydraulic oil.● The compatibility of water-glycol hydraulic fluid with packing materials, metals, surface treatment, coatings is shown in the table below.Steel, tin, nickel, copper, etc.ManufacturerShell Lubricants Japan K.K.ENEOS CorporationCosmo Oil Lubricants Co., Ltd.Idemitsu Kosan Co., Ltd.Exxon Mobil CorporationType of hydraulic oilGeneral hydraulic oil (mineral-based hydraulic oil)Phosphate ester hydraulic oil (flame-retardant hydraulic oil)Fatty acid ester hydraulic oil (flame-retardant hydraulic oil)Vegetable oil(brake oil)Packing materialMetalSurface treatmentCoatingData*For product names and oil characteristics, contact manufacturers.*If an hydraulic oil is used instead of a general hydraulic oil, parts may need to be changed as well as the packing material.Please contact us before use.* If a RIKEN product is used with water-glycol fluid, modification may be needed depending on the model. Please contact us for further information.ISO VG 32Shell Tellus S2 M32Super Hyrando 32Cosmo Hydro AW32Daphne Super Hydro 32 A Mobil DTE 20 series 24CompatibleNitrile rubber, fluoro rubberNickel plateEpoxy-based coatingViscosity gradeISO VG 46Shell Tellus S2 M46Super Hyrando 46Cosmo Hydro AW46Daphne Super Hydro 46 AMobil DTE 20 series 25Compatible packing materialNitrile rubber (NBR) Fluoro rubber (FKM) Nitrile rubber (NBR) Check the type of oil to be used.IncompatiblePolyurethane rubber, silicone rubberZinc, aluminum, magnesiumGalvanizingGeneral paint coating (RIKEN standard coating)No.79E since2025224
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