{"id":22921,"date":"2024-02-06T13:54:36","date_gmt":"2024-02-06T12:54:36","guid":{"rendered":"https:\/\/schuhmacher-tech.de\/no-two-hydraulic-oils-are-the-same\/"},"modified":"2024-08-19T18:51:51","modified_gmt":"2024-08-19T16:51:51","slug":"no-two-hydraulic-oils-are-the-same","status":"publish","type":"post","link":"https:\/\/schuhmacher-tech.de\/en\/no-two-hydraulic-oils-are-the-same\/","title":{"rendered":"No two hydraulic oils are the same"},"content":{"rendered":"\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

No two hydraulic oils are the same<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

…or “Does hydraulic-oil mixing also mean hydraulic-oil compatibility?”<\/p>\n

The user of hydraulic oils must know: “No two oils are the same!”<\/p>\n

Practical experience shows that even hydraulic oils from different manufacturers that meet the same specifications differ quite significantly from one another.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

1. cavitation in the valve due to mixing<\/span><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

If hydraulic fluids from different manufacturers or different types from the same manufacturer are mixed, sludging, sticking, deposits due to additive reactions or even a deteriorated air separation capacity can occur in practice. This may lead to foaming or an increased risk of cavitation. Malfunctions and damage to the hydraulic system are inevitable. For this reason, many manufacturers of hydraulic systems generally prohibit any mixing with other hydraulic fluids, including hydraulic fluids of the same classification, because modern lubricants are made from a variety of base oils and “ingredients”, i.e. complex combinations of active ingredients (additives). This additive cocktail can enhance the existing properties of the base oil or give the end product a required property for the application. The list of different base oils and additive components is very long and experience has shown that hydraulic oil manufacturers are not willing to show their cards.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

As a general rule, miscibility does not automatically mean compatibility!<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

2. tank with deposits due to mixing<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

3. precipitation due to mixing<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

The experience of independent oil laboratories has shown time and again in their daily work with hydraulic problems that hydraulic oils with the same base oil, similar viscosity and comparable density mix very well with each other, but due to the different additives, incompatibilities occur during operation, which is then the reason for the hydraulic malfunction of the system.<\/p>\n<\/p>\n

Note: What is chemically miscible can have a highly negative effect on the physical properties of the hydraulic fluid.<\/p>\n<\/p>\n

Attention! Some oil suppliers advertise miscibility in their technical data sheets and only confirm this. However, the question from the user to the oil supplier must be: “Are the hydraulic oils compatible with each other after mixing?”<\/strong><\/p>\n

Miscibility<\/strong> describes a chemical property and is only given when two liquids easily dissolve completely in each other.<\/p>\n

Compatibility<\/strong>, on the other hand, means that two fluids or two hydraulic oils can be easily mixed together, but must retain their individual properties. The different additive packages must not react against each other. This happens if it is not clarified with the oil supplier before mixing hydraulic oils with different designations whether the same or approximately the same additive performance is used in addition to the same base oil properties. Mixing oils with different base oils and different additives should be avoided as far as possible. Information on the compatibility of lubricants is often difficult or impossible to obtain from the oil supplier.<\/p>\n<\/p>\n

The following hydraulic fluids should not be mixed under any circumstances:<\/strong><\/p>\n