12/15/2023 0 Comments Hydraulic fluid viscosity chartThere are some disadvantages to these fluids, including high cost, toxicity and potential incompatibility with certain seal materials.Ī petroleum (mineral) fluid is a more common fluid and is made from refining crude to a desired level to achieve better lubricant performance with the inclusion of additives, which range from anti-wear (AW), rust and oxidation inhibitors (RO) and viscosity index (VI) improvers. These fluids are great choices where high or low temperatures are present and/or high pressures are required. It can range from full synthetic (to handle drastic temperature and pressure swings) to water-based fluids (used in applications where there is a risk of fire).Ī synthetic fluid is a manmade chain of molecules that are precisely arranged to provide excellent fluid stability, lubricity and other performance-enhancing characteristics. The chemical makeup of a hydraulic fluid can take many forms when selecting it for specific applications. These roles range from a heat transfer medium, a power transfer medium and a lubrication medium. ![]() Hydraulic fluid has many roles in the smooth operation of a well-balanced and designed system. Selecting the best product for your system requires that you collect and utilize all available information.Īn anti-wear hydraulic oil ofhigh viscosity index base oils with low pour points for wide temperature range applicability, like CITGO’s Mystik® JT-9™ LeakShield® AW Hydraulic Oil, would make a great fit for various hydraulic systems. These specifications are typically determined by the type of hydraulic pump employed in the system, the operating temperature and the system’s operating pressure. With hydraulics, there are two primary considerations – the viscosity grade and the hydraulic oil type ( AWor R&O). Most lubricant misspecifications don’t lead to sudden and catastrophic failure rather, a misspecification shortens the average life of the lubricated components or decreases efficiency over time and, thus, goes unnoticed. Just because a machine will run with a particular product doesn’t mean that product is optimum for the application. It is a NATO Code Number H-515 fluid.For most lubricated machines, there are many options when it comes to lubricant selection. ![]() It is intended primarily for military aircraft, but it is also used as a hydraulic fluid for small private and commercial aircraft, and as a strut fluid in landing gear of large commercial aircraft. ![]() It has physical properties very similar to Mobil Aero HFA, and also meets "super-clean" requirements required by modern aircraft hydraulic systems. Mobil Aero HF is a premium quality fluid that is approved against the most current version of U.S. It is also used in industrial and commercial equipment requiring good fluidity at very low temperatures, where Mobil Aero HFA provides long, trouble-free service over a wide range of operating conditions. Military, it is still used in some older, small private, and commercial aircraft. While this quality fluid is no longer used by the U.S. It has a very high VI and is suitable for use at temperatures down to -54 ✬ (-65 ✯). ![]() Military specification MIL-H-5606A (now obsolete). Mobil Aero HFA is a premium quality fluid that meets the quality requirements of the U.S.
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