Variable Displacement Pump A10VSO - Group VH A/S

RE 92 711/03.00Technical DataHydraulic fluidFor extensive information on the range of fluids and applicationconditions please see our data sheet RE 90220 (mineral oils),RE 90221 (environmentally acceptable fluids) and RE 90223(HF-fire resistant hydraulic fluids).When using HF- or environmentally acceptable hydraulic fluidspossible limitations for the technical data have to be taken intoconsideration. If necessary please consult our technical department(please indicate type of the hydraulic fluid used for your applicationon the order sheet).Operation on Skydrol hydraulic fluid is subject to consultation.Operating viscosity rangeIn order to obtain optimum efficiency and service life, we recommendthat the operating viscosity (at operating temperature) be selectedfrom within the rangeν opt= operating viscosity 16...36 mm 2 /sreferred to the reservoir temperature (open circuit).Viscosity limitsThe limiting values for viscosity are as follows:ν min= 10 mm 2 /sshort term at a max. permissible case temp. of 90° C.ν max= 1000 mm 2 /sshort term on cold start.Temperature range (see selection diagram)t min= – 25° Ct max= 90° CSelection diagramviscosity ν (mm 2 /s)10006004002001008060402015- 20° 0° 20° 40° 60° 80° 100°1000VG 22VG 32VG 68VG 46VG 1001010- 25° - 10° 10° 30° 50° 70° 90° temperaturet min= -25° Ct (° C)t max= +90° Cfluid temperature range36ν opt16Notes on the selection of the hydraulic fluidIn order to select the correct fluid, it is necessary to know the operatingtemperature in the tank (open loop) in relation to the ambienttemperature.The hydraulic fluid should be selected so that within the operatingtemperature range, the operating viscosity lies within the optimumrange (ν opt) (see shaded section of the selection diagram). Werecommend that the higher viscosity range should be chosen in eachcase.Example: At an ambient temperature of X° C the operatingtemperature is 60° C. Within the operating viscosity range (ν opt;shaded area), this corresponds to viscosity ranges VG 46 or VG 68;VG 68 should be selected.Important: The leakage oil (case drain oil) temperature is influencedby pressure and pump speed and is always higher than the tanktemperature. However, at no point in the circuit may the temperatureexceed 90° C.If it is not possible to comply with the above conditions because ofextreme operating parameters or high ambient temperatures pleaseconsult us.FiltrationThe finer the filtration the better the cleanliness of the pressure fluidand the longer the life of the axial piston unit.To ensure the functioning of the axial piston unit a minimumcleanliness level of:9 to NAS 163818/15 to ISO/DIS 4406 is necessary.If above mentioned grades cannot be maintained please consultsupplier.High-speed-versionThe size 140 is available in an optional high speed version. This versionallows higher drive speeds at max. displacement (higher output flow)without affecting outside dimensions, see table on page 5.Mechanical displacement limiterMechanical displacement limiter is possible on the nonthroughdrivemodel, N00 series but not for the model with throughdrive.Exception: with FE1-, FE1D- and DFE1 control a max. displacementscrew is not possible at all.V g max: for sizes 28 to 140Setting range V g maxto 50% V g maxsteplessV g min: for sizes 100 and 140Setting range V g minto 50% V g maxsteplessBrueninghaus Hydromatik 4/40 A10VSO