Axial Piston Variable Pump A7VO

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Electric Drivesand ControlsHydraulicsLinear Motion andAssembly TechnologiesPneumaticsAxial piston variable pumpA7VOServiceRE 92203/06.09Replaces: 05.991/52Data sheetSeries 63Sizes NG250 to 500Nominal pressure 350 barPeak pressure 400 barOpen circuitContentsType code for Standard programTechnical dataDimensions size 250Dimensions size 250 High-Speed-VersionDimensions size 355Dimensions size 500DR Pressure controlDRG remote pressure controlLRD Power control with integrated pressure controlLRG with remote pressure controlLRDH with hydraulic stroke limiterLRDN with hydraulic stroke limiterHD.D Hydraulic control, pilot pressure dependentHD.D with intrgrated pressure controlHD.G with remote pressure controlEP.D Electric control with proportional valveEP.D with integrated pressure controlEP.G with remote pressure controlPlugOptical swivel angle indicatorElectric swivel angle indicatorInstallation instructions standard programInstallation instructions High-Speed-VersionGeneral 243454647484952– Variable axial piston pump with tapered piston rotary group inbent axis design for hydrostatic drives in open circuits– For operation in mobile and industrial applications– The flow is proportional to the drive speed and the displacement and steplessly variable from qv max to qv min 0– Wide range of controls and adjustment devices– Compact, robust bearing system for long service life– Available with Long Life bearings for special fluids andextreme service life requirements– Pressure control is standard– Optical or electric swivel angle indicator available

2/52Bosch Rexroth AGA7VO Baureihe 63 RE 92203/06.09Type code for standard programA7V0102O0304/05066307–08V09Fluid / VersionMineral oil and HFD. HFD only in conjunction with Long-Life-Lagerung „L“ (no code)01For operation on HFC, special high performance version A4VSO.F see RE 92053High-Speed-Version (only mineral oil)10111213250 355 500 – ––H 1)Axial piston unit02 Bent axis design, variable, nominal pressure 350 bar, peak pressure 400 barDrive shaft bearingsMechanical bearings (no code)03Long-Life-bearingsA7V250 355 500 LType of operation04 Pump, open circuit05OSizeDisplacement Vg max [cm3]250 355 500NG28 to160 see RE 92202Control devices250 355 500 Pressure controlPressure control, remotely adjustablePower controlwith integrated pressure control (fixed setting)hydraulic stroke limiterinitial position Vg maxhydraulic stroke limiterinitial position Vg minΔp 10 barΔp 25 barΔp 35 barΔp 10 barΔp 25 barΔp 35 bar 3LRGN1LRGN2LRGN3Δp 10 barΔp 25 barΔp 35 barΔp 10 barΔp 25 barΔp 35 bar HD1DHD2DHD3DHD1GHD2GHD3GControl voltage 12 VControl voltage 24 VControl voltage 12 Vcontrol voltage 24 V EP1DEP2DEP1GEP2GΔp 10 barΔp 25 barΔp 35 barΔp 10 barΔp 25 barΔp 35 barwith pressure control remotely adjustablehydraulic stroke limiterinitial position Vg max06hydraulic stroke limiterinitial position Vg minHydraulic control, pilot pressure dependent,with integrated pressure control (fixed setting)with pressure control, remotely adjustableHydraulic control, with electric proportional valve 2)with integrated pressure control (fixed setting)with pressure control, remotely adjustable1)2)DRDRGrecommended for new projectsfor operation on HFD-fluids please observe RE 29181 (proportional pressure reducing valve type DRE4K)

RE 92203/06.09 A7VO Baureihe 63Bosch Rexroth AG3/52Type code for standard 0 355 50007 Series 6, Index 3081363Direction of rotationwith view on drive shaft250 355 500clockwiseRcounter clockwiseLSeals250 355 50009 FKM (Fluoro-rubber)1011VDrive shaftSplined shaft to DIN 5480250 355 500ZKeyed parallel shaft to DIN 6885PMounting flangeSimilar to ISO 3019-24-hole8-holeService line connections12250 355 500–––BH250 355 500SAE-flanged port B or A, at rear (metric fixing bolts)SAE flanged port S, at rear(metric fixing bolts)01SAE- flanged ports B or A, on opposite side (metric fixing bolts)SAE- flanged port S, on opposite side (metric fixing bolts)02Swivel angle indicator250 355 500Without swivel angle indicator (no code)13 With optical swivel angle indicatorVWith electric swivel angle indicatorENoteExact value for Vg min and Vg max (displacement) must be stated in clear text when ordering (Vg min .cm3/rev., Vg max .cm3/rev.)Setting rangeVg min: 0 to 0.2 Vg maxVg max: Vg max down to 0.8 Vg max Available– Not available Preferred program

4/52Bosch Rexroth AGA7VO Baureihe 63 RE 92203/06.09Technical dataHydraulic fluidνmax 1000 mm2/sfor short periods (on cold start maximum operatingviscosity of 100 mm2/s should be reached within15 min)tmin –25 CNote, that the maximum fluid temperature of 90 C may not beexceeded at any point (e.g. around the bearings). The fluid temperature in the bearing area is influenced by drive speed andpressure, and is typically 12 K higher than the average casedrain temperature.100 10000 10 mm2/sfor short periods (t 3 min)at max. permissible case drain temperaturetmax 90 C.80 10νmin60 VGFor critical operating conditions the following values apply:46Limit of viscosity range68referred to tank temperature (open circuit).VGνopt opt. viscosity range 16.36 mm2/s40 100806040νopt3620161510–25 In order to obtain optimum efficiency and service life, werecommend that the operating viscosity (at operating temperature) be selected in the range32Operating viscosity range20 VG20022When ordering, state the fluid to be used in clear text.0 –20 VGFor the sizes 250 and 355 with operation on HFC-fluids, theA4VSO.F must be used. For certain selected HFC fluids thesame pressures and speeds are permissible as for operationon mineral oil. See RE 92053.1000600400VGThe variable pump A7VO is not suitable for operation on HFAfluids. When operating on HFD or ecologically acceptablefluids, limitations to the technical data and seals according toRE 90223 and RE 90221 must be observed.Selection diagramViscosity ν [mm2/s]For extensive information on the selection of hydraulic fluidsand application conditions please consult our data sheets RE90220 (mineral oils), RE 90221 (ecologically acceptable fluids)and RE 90223 (HF-fluids).10–10 tmin –25 C50 70 10 30 Fluid temperature range90 Temperaturt ( C)tmax 90 CNotes on the selection of hydraulic fluidsIn order to select the correct fluid, it is necessary to know theoperating temperature in the tank (open circuit) in relation to theambient temperature.The hydraulic fluid should be selected so that within the operating temperature range, the viscosity lies within the optimumrange (νopt) see shaded section in the selection diagram. Werecommend, that the higher viscosity grade is selected in eachcase.Example: at an ambient temperature of X C the operatingtemperature in the tank is 60 C. In the optimum viscosity range(νopt ; shaded area), this corresponds to grades VG 46 or VG 68;select: VG 68.Important:The case drain temperature is influenced by pressure and speedand is always higher than the tank temperature. However the max.temperature at any point in the system may not exceed 90 C.If the above conditions cannot be met, due to extreme operatingparameters we recommend a housing flushing via port U.Temperature rangeFiltration(see selection diagram)The finer the filtration, the better the achieved cleanliness of thefluid and the longer the life of the axial piston pump.tmin –25 Ctmax 90 CFor detailed information on operation with low temperaturessee RE 90300-03-B.To ensure a reliable functioning of the axial piston unit, a minimum cleanliness class of20/18/15 acc. to ISO 4406 is necessary.

RE 92203/06.09 A7VO Baureihe 63Bosch Rexroth AG5/52Technical dataOperating pressure rangeDefinitionDepending on the operating fluid, limitations may apply, see thechapter on hydraulic fluids, page 4.Nominal pressure pnomThe nominal pressure corresponds to the maximum designpressure.Pressure at the outlet ports (pressure ports) A or BNominal pressure pnom 350 bar absolutePeak pressure pmax 400 bar absoluteTotal operating period 300 hIndividual operating period 1 sMinimum pressure (in pump outlet) 10 barFor a lower pressure, please consult us.Rate of pressure change RA 16000 bar/spnomPeak pressure pmaxThe peak pressure corresponds to the maximum pressurewithin the individual operating period. The total of the individualoperating periods must not exceed the total operating period.Minimum pressure (in pump outlet)Minimum pressure in the pump outlet side (port A or B) that isrequired in order to prevent damage to the axial piston unit.Rate of pressure change RAMaximum permissible pressure build-up and pressure reduction speed with a pressure change over the entire pressurerange.Pressure pPressure pΔtΔpIndividual operating periodt1t2tnPeak pressure pmaxNominal pressure pnomTime tUnder pulsating load conditions above 315 bar we recommendthe use of a splined shaft (to DIN 5480).Pressure at the inlet port S (Suction)Minimum inlet pressure pS min 0.8 bar absoluteMaximum inlet pressure pS max 8 bar .80.80.60.70.8Displacement0.9Vg1.0Inlet pressure pS [bar]Minimum inlet pressureIn order to avoid damage to the axial piston pump a certainminimum inlet pressure at the pump‘s suction port S is necessary This minimum inlet pressure is dependent on the drive speedand the displacement of the axial piston unit.Vg maxNote– Maximum speed nmax(Speed limit, see table of values, page 8)– Minimum and maximum pressure at port S– Permissible values for the shaft seal(see diagram on page 7)An increase in inlet pressure results in a higher control begin ofthe LR-control curve as well as a rise of the LR.H- and LR.Npilot pressure characteristics.Factory setting of the control begin is done at an inlet pressurepS. 1 bar absolute.Exact details of the shifts in the control curves on request.Minimum pressure (in pump outlet)Time tTotal operating period t1 t2 . tnDirection of flowDirection of rotation, with view on shaft endclockwisecounter clockwiseS to BS to A

6/52Bosch Rexroth AGA7VO Baureihe 63 RE 92203/06.09Technical dataLong-Life-Bearings (L)Operation in standby (in pressure control mode)For long service life requirements and when using HFD-fluids.Identical external dimensions as units with standard bearings.A retroactive conversion to Long-Life Bearings is possible. Itis recommended, that the bearings and housing be flushed viaport U.Operation in standby, without external flushing via port U isonly permissible for short periods:A7VO maximumHA7VO maximumBearing flushing15 min at 200 bar3 min at 350 bar5 min at 200 bar1 min at 350 barFor other pressure levels information on requestFlushing flows (recommended)Influence of drive speed can be neglected250355500qflow (L/min)101616At tank temperature 50 CFor longer periods of standby operation it is necessary toimplement housing flushing vie port U.Flushing portRUSFlushing flows for A7VO same as bearing flushingFlushing flows HA7VO (High-Speed-version)50Flushing-resp. remainingpump flow [L/min]NG4030201000100200300Operating pressure p [bar]350

RE 92203/06.09 A7VO Baureihe 63Bosch Rexroth AGTechnical dataShaft seal FKM (Fluoro-rubber)Permissible case pressureThe service life of the shaft seal is influenced by pump drivespeed and case pressure. It is recommended not to exceed thecontinuous averaged case pressure of 3 bar abs. (max. perm.case pressure 4 bar abs. at reduced speed, see diagram).The case pressure must be equal to or higher than the externalpressure on the shaft seal (in case of the standard version). Forthe High-Speed-version please consult us.4NG2503.5Perm. case pressurepS. max. [bar]NG3553NG5002.521.5105001000150020002500Speed n [min-1]Special operating conditions may make it necessary to restrictthese values .Important:– maximum permissible drive speed of variable pump(see table of values, page 8)– max. permissible case pressure pS max 4 bar– an increase in case pressure results in a higher control beginof the HD- and DR- controls.Exact details of the shift in control characteristics on request.Factory setting of the control begin at pS 1 bar.Temperature rangeThe FKM shaft seal is suitable for case temperatures of -25 Cto 90 C.7/52

8/52Bosch Rexroth AGA7VO Baureihe 63 RE 92203/06.09Technical dataTable of values (theoretical values, without considering ηmh and ηv; values rounded off)SizeNG250High-Speed-VersionDisplacementSpeed maximum2)4)Speed maximum3)4)Maximum flow 4)Maximum powerTorque4)4)Rotary stiffnessVg max1)cm31)g min3355500250H2502503555000000Vcmat Vg maxnnomrpm1500180013201200at Vg Vg maxnmaxrpm1800–16001500at nnom (Vg max)qv max nomL /min375450469600at qv nom and Δp 350 barPnomkW219262273350at Vg max and Δp 350 bar(continuous operation)TmaxNm1391139119782785Vg max to 0.5 Vg maxcminNm/rad5950059500748001150000.5 Vg max to oment of inertia rotary groupJTWkgm20.0610.0610.1020.178Angular acceleration maximumα1000010000830055002rad/sCase volumeVL3357Weight approx.mkg1021021732341)Standard setting for limitation of the swivel angle. If another setting is required, please state in clear text.Setting rangeVg max: Vg max to 0.8 Vg max2)Nominal speed in self priming operation with an absolute pressure (pS) of 1 bar at inlet port S and mineral oil with a density of0,88 kg/L3)The values apply for Vg Vg max or an increase in inlet pressure pS at the inlet port S (see diagram page 5)4)Depending on the type of fluid, restrictions may be necessary, see chapter hydraulic fluids page 4Vg min:0 to 0.2 Vg maxImportantExceeding the maximum or falling below the minimum permissible values can lead to a loss of function, a reduction in operationalservice life or total destruction of the axial piston unit. More details on limiting values for speed fluctuations, reduction in angular acceleration dependent on the frequency and the permissible starting angular acceleration (below the maximum angular acceleration)can be found in data sheet RE 90261.Determination of sizeFlowqV Drive torqueT PowerP Vg n ηV[L/min]1000Vg Δp[Nm]20 π ηmh2π T n60000 qV Δp600 ηt[kW]Vg Geometr. displacement per revolution in cm3Δp Differential pressure in barn Speed in rpmηV Volumetric efficiencyηmh Mechanical-hydraulic efficiencyηt Overall efficiency (ηt ηV ηmh)

RE 92203/06.09 A7VO Baureihe 63Bosch Rexroth AG9/52Technical dataPermissible radial and axial forces on the drive shaftSizeNGRadial force, maximum 1)(at pA,B 1bar)250355500FqX/2 X/2Fq maxN120015001900 Fax maxN400050006250– Fax maxN120015001900XAxial force, maximum 2)(at pA,B 1bar) Fax1)When at standstill or pressureless circulation of the axial piston unit. Under pressurized condition higher forces are permissible,please consult us2)Maximum permissible axial force at standstill or pressureless circulation of the axial piston unitRegarding the permissible axial force, the direction of the force must be taken into consideration:– Fax max increase of bearing life Fax max decrease of bearing lifeInfluence of the radial force Fq on the bearing lifeThrough a favourable direction of the actuating radial force Fq,the internal load on the bearings can be compensated for and inthis manner an optimum on bearing life can be obtained, please consult us.

10/52Bosch Rexroth AGA7VO Baureihe 63 RE 92203/06.09Before finalizing your design, request a bindinginstallation drawing. Dimensions in mm.Dimensions size 250Ports A (B) and S on opposite sides (02), clockwise rotation(without control devices)385*2468222Vgminø2289R25m ax. 275 *44576 6 .7Z6M1MB276287344* see control deviceswith ports at rear (01)View Y4461.9ø 75106.4SM16x2, 24 deep287 to mounting flange faceView Z clockwise rotationBSView Z counter clockwise rotationYSAMBMA7311273130130112246161 *10510513 15 ø 32M14x2, 19 deepVgmax 360BR20 ø224 h84x9Y0258280ø23 1 .8ø25945 R1U12030

RE 92203/06.09 A7VO Baureihe 63Bosch Rexroth AG11/52Before finalizing your design, request a bindinginstallation drawing. Dimensions in mm.Dimensions size 250Ports A (B) and S at rear (01)View Z clockwise rotationView Z counter clockwise �75SBA131.861.9106.466.731.8M16x2, 24 deepM16x2, 24 deepM14x2, 19 deepM14x2, 19 deepMB6873MA6860119130130 6015115173119Drive shafts53.558108ø50k636ø49.6M16x2 1)2)P Parallel keyed shaftDIN 6885, AS14x9x80ø45M16x2 1)2)Z Splined shaft DIN 5480W50x2x24x9g36821321)Centering bore to DIN 332(Thread to DIN 13)PortsDesignationPort forStandardSize2)A, (B)Pressure outlet (high pressure range)Fixing threadSAE J5184)DIN 13SSuction (standard pressure range)Fixing threadSAE J5184)DIN 13UFlushingDIN 3852M14x1.5; 12 deep3XR1Case drainDIN 3852M22x1.5; 14 deep3OR2Case drainDIN 3852M22x1.5; 14 deep3XMA, M BMeasuring pressure A, BDIN 3852M14x1.5; 12 deep400XPeak pressure3)[bar]State1 1/4inM14x2; 19 deep400O3 inM16x2; 24 deep7O2)For the max. tightening torques the general information on page 52 must be observed3)Depending on the application, momentary pressure spikes can occur. Take this into consideration when selecting the measuringdevices and fittings.4)Only dimensions to SAE J518O Must be connected (closed on delivery)X Plugged (in normal operation)

12/52Bosch Rexroth AGA7VO Baureihe 63 RE 92203/06.09Dimensions size 250 High-Speed-VersionBefore finalizing your design, request a bindinginstallation drawing. Dimensions in mm.Ports A (B) and S on opposite sides (02), clockwise rotation(without control devices)384*24682ø22ZR256M1M14x2, 19 deepVgmaxMB276287342* siehe VerstellgeräteLocation A1, B1 and S1* see control devicesAnsicht Y4461.9ø 75106.4SM16x2, 24 deep287 to mounting flange faceView Z clockwise rotationAnsicht Z Drehrichtung rechtsBB1S1SView Z counter clockwise rotationAnsicht Z Drehrichtung linksYSS1 A1MBAMA68731126060130130Ports A1, B1 and S1 closed pressure tight with plug or flange plate, Dimensions like A, B and S6873112246158 *max. 247*66.7M33x4457882, 18deep10510513 15 360BR20 ø224 h84x9Y0258280ø231.8ø25945 R1U12030 Vgmin22

RE 92203/06.09 A7VO Baureihe 63Bosch Rexroth AG13/52Before finalizing your design, request a bindinginstallation drawing. Dimensions in mm.Dimensions size 250 High-Speed-VersionPorts A (B) and S at rear (01)View Z clockwise rotationView Z counter clockwise rotation112112S1S1A161.9M33x218 tiefM16x2, 24 deepø75106.4ø75SB31.861.9106.466.731.8SAM16x2, 24 deepM14x2, 19 deepM33x218 tief 66.7B1M14x2, 19 deepMB68731196860130130 60151151MA73119Drive shafts53.558108ø50k636ø49.6M16x2 1)2)P Parellel keyed shaftDIN 6885, AS14x9x80ø45M16x2 1)2)Z Splined shaft DIN 5480W50x2x24x9g36821)132Centering bore to DIN 332(Thread to DIN 13)Ports)3)DesignationPort forStandardSize2Peak pressure [bar] StateA, (B)SAE J5184)DIN 13SAE J5184)DIN 13SAE J5184)DIN 13SAE J5184)DIN 13DIN 38521 1/4inM14x2; 19 deep1 1/4inM14x2; 19 deep3 inM16x2; 24 deep3 inM16x2; 24 deepM14x1.5; 12 deep400O400X 5)36)O36)X7)UPressure outlet (high pressure series)Fixing thread2. Pressure outlet (high pressure series)Fixing threadSuction (standard pressure series)Fixing thread2. Suction (standard pressure series)Fixing threadFlushing3XR1, R2Case drainDIN 3852M22x1.5; 14 deep 3X8)MA, M BMeasuring outlet pressure A, BDIN 3852M14x1.5; 12 deep 400XA1, (B1)SS12)For the max. tightening torques the general information on page 52 must be observedDepending on the application momentary pressure spikes can occur. Take this into consideration w

Axial piston variable pump A7VO Data sheet Series 63 Sizes NG250 to 500 Nominal pressure 350 bar Peak pressure 400 bar Open circuit RE 92203/06.09 1/52 Replaces: 05.99 Features – Variable axial piston pump with tapered piston rotary group in bent axis design for hydrostatic drives in open circuits

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