The current trend in hydraulics is toward higher flow rates, increased working pressures and greater performance. With the introduction of the DYNAMAX EC850 hose and complementary fittings, power management company Eaton provides a solution for mobile hydrostatic drive, direct-drive steering and other hydraulic system applications requiring very high pressures.
“During development, the main objective was that there should not be any compromise in the ease of installation by the end user,” said Jürgen Schmidt, marketing manager, Fluid Conveyance, EMEA, Eaton. “Flexibility is a distinct advantage of the DYNAMAX EC850 hose, which uses only four spiral wire reinforcement layers. For the larger -20 (DN31) hose size, a six wire layers construction is used to achieve the high working pressure.”
Featuring a bend radius that is 10% better than the SAE100R15 industry standard, the hose is very flexible with a 27% reduction in force-to-bend ratio, which results in easy installation of the hose assembly in tight spaces. The inner tube material of the hose increases service life, and meets the requirements of the REACH regulation regarding allowed chemicals in the compounds. It is also qualified with a safety factor of a 4:1 burst pressure, and meets a class 0 leakage in accordance with SAE J1176.
A complete range of complementary hose fittings and adapters is available for all four hose sizes. In addition to the standard code 62 fitting style, Eaton also offers the DKO S range that achieves pressures up to 500 bar (7,250 psi). The fittings are offered with chrome III plating as the standard, and an optional corrosion-resistance plating based on zinc-nickel coating.
For customer specific applications requiring long service life, customized fittings are available for the sizes -16 (DN25) and -20 (DN31). Featuring a non-brazed construction, hose assemblies using these fittings are tested to 1 million flex-impulse cycles at up to 500 bar (7,250 psi).