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Axial piston variable double pumpA22VG series 40RE 93221Edition: 05.2014Replaces: 06.2012 Size 45 Nominal pressure 380 bar Maximum pressure 420 bar Closed circuitFeaturesContents Variable double pump with two axial piston rotaryOrdering code2groups of swashplate design for hydrostatic drives in aHydraulic fluids4closed circuitShaft seal5Operating pressure range6Technical data7HW proportional hydraulic control, mechanical servo9 The flow is proportional to the drive speed and displacement. The flow can be infinitely varied by adjusting the swashplate angle. Flow direction changes smoothly when the swashplateis moved through the neutral position.EP proportional electric control11HT hydraulic control, direct controlled13ET electric control, direct controlled14 Only one shared port for case drain fluid for both circuitsDA control valve, fixed setting15 Compact design for tight installation conditionsDimensions, size 4516Through drive dimensions19Overview of attachment options19Boost pump20High-pressure relief valves20Mechanical stroke limiter21NoteOnly for series no smaller than 200 units per year.Please contact us regarding smaller series. Ports X3 and X4 for stroking chamber pressure21Swivel angle sensor22Connector for solenoids23Installation dimensions for coupling assembly23Installation instructions24Project planning notes26Safety instructions26RE 93221/05.2014, Bosch Rexroth AG

A22VG series 40 Axial piston variable double pumpOrdering code2Ordering 2S7317181920A–Axial piston unit01A22VSwashplate design, variable, nominal pressure 380 bar, maximum pressure 420 barOperating mode02GDouble pump, closed circuitSize (NG)03045Geometric displacement, see technical data on page 7Control device04Proportional control hydraulicmechanical servo, hexagon shaft with lever, free position1)without neutral position switchHW2with neutral position switchHW8Proportional control electricU 12 V DCEP1U 24 V DCEP2HT1Hydraulic control, direct operatedElectric control, direct operated;two pressure reducing valves per circuitU 12 V DCET1U 24 V DCET2Connector for solenoids2) (see page 23)05Without connector (without solenoid, only for hydraulic control)0DEUTSCH – molded connector, 2-pin – without suppressor diodePSwivel angle sensor (see page 22)06Without swivel angle sensor0Electric swivel angle sensor mounted3)RPilot pressure ports07Ports X1 and X2HWHTEPET ‒ 13Ports X3 and X4‒ ‒‒Ports X1, X2 and X3, X4 ‒ 4Ports X5 and X6‒ ‒‒5Mechanical stroke limiter (see page 22)08Without mechanical stroke limiter0One-sided mechanical stroke limiter, externally adjustable, on opposite side to service line portsFDA control valve (see page 15)09HWHTEPETWithout DA control valve 0DA control valve fixed setting ‒1Series10Series 4, index 040Configuration of ports and fastening threads11ANSI, port threads with O-ring seal according to ISO 11926 Available1)2)3)– Not availableOn delivery, the position of the lever may differ from that shown inthe brochure or drawing. If necessary, the position of the lever canbe adjusted by the customer.Connectors for other electric components can deviate.Please contact us if the swivel angle sensor is used for controlBosch Rexroth AG, RE 93221/05.2014A

Axial piston variable double pump A22VG series 40 3Ordering code 171819A20–Direction of rotation12Viewed on drive shaftclockwiseRcounter-clockwiseLSealing material13NNBR (nitrile-rubber), shaft seal in FKM (fluoroelastomer)Mounting flange14B2SAE J744, 101-2Drive shaft (permissible input torque, see page 17)15S7Splined shaft ANSI B92.1a, 1 1/4 in 14T 12/24DPService line ports163Threaded ports A and B, left (viewed on drive shaft)Boost pump4)17Without boost pump (standard)UBoost pumpFThrough drive (mounting options, see page 19)18Flange SAE J744DiameterMounting101-2 (B)Hub for splined shaft5)6)DesignationDiameterDesignationB27/8 in13T 16/32DPS4B2S41 in15T 16/32DPS5B2S5Pressure-relief valve19High-pressure relief valve, direct operated, without bypass (for values, see page 20)AStandard / special version20Standard version0Standard version with installation variants, e.g. T ports against standard open or closedYSpecial versionS Available– Not availableNotes Observe the project planning notes on page 26! A pressure cut-off is not available for this unit. Preservation:–– up to 12 months as standard–– up to 24 months long-term(state in plain text when ordering)4)5)6) Pressure or suction filtration required. To be supplied by customer.Boost pressure inlet at port G, a DA control valve is used at port G1.Hub for splined shaft according to ANSI B92.1aMounting drillings pattern viewed on through drive with control at topRE 93221/05.2014, Bosch Rexroth AG

4A22VG series 40 Axial piston variable double pumpHydraulic fluidsHydraulic fluidsThe A22VG variable double pump is designed for operationDetails regarding the selection of hydraulic fluidwith HLP mineral oil according to DIN 51524.The hydraulic fluid should be selected such that theApplication notes and requirements for hydraulic fluidsoperating viscosity in the operating temperature range isshould be taken from the following data sheets before thewithin the optimum range (νopt see selection diagram).start of project planning:Note 90220: Hydraulic fluids based on mineral oils andAt no point of the component may the temperature berelated hydrocarbons 90221: Environmentally acceptable hydraulic fluidshigher than 115 C. The temperature difference specified 90222: Fire-resistant, water-free hydraulic fluidsin the table is to be taken into account when determiningthe viscosity in the bearing.(HFDR/HFDU)If the above conditions cannot be maintained due toextreme operating parameters, please contact the responsiblemember of staff at Bosch Rexroth.Viscosity and temperature of hydraulic fluidsViscosityCold startTemperatureνmax 1600 mm /s2Permissible temperature differenceWarm-up phaseν 1600 to 400 mm2/sCommentθSt -40 Ct 3 min, n 1000 rpm, without load p 50 barΔT 25 Kbetween axial piston unit and hydraulic fluid in the systemθ -40 C to -25 CAt p 0.7 pnom, n 0.5 nnom and t 15 minThis corresponds, for example on the VG 46, to a temperaturerange of 5 C to 85 C (see selection diagram)Continuous operation ν 400 to 10 mm2/smeasured at port TNote the permissible temperature range of the shaft seal(ΔT approx. 5 K between the bearing/shaft seal and port T)θ -25 C to 110 CShort-term operationνopt 36 to 16 mm2/sRange of optimum operating viscosity and efficiencyνmin 7 mm /st 3 min, p 0.3 pnom2 Selection diagramWarm-up phase16001000600400Bosch Rexroth AG, RE 93221/05.2014Viscosity v [mm2/s]100Minimum permissible viscosity for short-term operationMinimum permissible temperature for cold start010VG 68VG 46VG 32VG 22200VGOptimum operating viscosity range voptOptimum efficiencyContinuous operationMaximum permissible viscosity for cold ure t [ C]90115

Filtration of the hydraulic fluidFiner filtration improves the cleanliness level of the hydraulicfluid, which increases the service life of the axial pistonunit.Axial piston variable double pump A22VG series 40 5Shaft sealShaft sealPermissible pressure loadingThe service life of the shaft seal is influenced by the speedA cleanliness level of at least 20/18/15 is to be maintainedof the axial piston unit and the leakage pressure in theaccording to ISO 4406.housing (case pressure). Momentary pressure spikesWe recommend, depending on the system and application,(t 0.1 s) of up to 10 bar are permitted. The service lifefor the A22VG: filter cartridges β20 100.of the shaft seal decreases with increasing frequency ofAt very high hydraulic fluid temperatures (90 C to maximumpressure spikes and increasing mean differential pressure.110 C, measured at port T), a cleanliness level of at leastThe case pressure must be equal to or higher than the19/17/14 according to ISO 4406 is necessary.ambient pressure.Differential pressure Δp [bar]543NG452101000200030004000Rotational speed n [rpm]The FKM shaft seal may be used for leakage temperaturesfrom 25 C to 115 C. For application cases below 25 C, an NBR shaft seal is required (permissible tempera-ture range: 40 C to 90 C). RE 93221/05.2014, Bosch Rexroth AG

6A22VG series 40 Axial piston variable double pumpOperating pressure rangeOperating pressure rangePressure at service line port A or BDefinitionNominal pressure pnom380 bar absolute The nominal pressure corresponds to the maximum design pressure.Maximum pressure pmax420 bar absolute The maximum pressure corresponds to the maximum operating pressure withinthe single operating period. The sum of the single operating periods must not exceed10 sthe total operating period.300 hSingle operating periodTotal operating periodMinimum pressure(high-pressure side)25 bar absoluteMinimum pressure (low-pressure side) 10 bar abovecase pressureRate of pressure change RA max9000 bar/sMinimum pressure at the high-pressure side (A or B) which is required in order toprevent damage to the axial piston unit.Minimum pressure at the low-pressure side (A or B) which is required in order toprevent damage to the axial piston unit. Boost pressure setting must be higherdepending on system.Maximum permissible rate of pressure build-up and reduction during a pressurechange over the entire pressure range.Boost pumpNominal pressure pSp nom25 bar absoluteMaximum pressure pSp max30 bar absolutePressure at suction port S (inlet)Continuous pS min (ν 30 mm2/s) 0.8 bar absoluteShort-term, on cold start(t 3 min) 0.5 bar absoluteMaximum pressure pS max 5 bar absoluteControl pressureMinimum control pressure pSt minControls EP and HW18 bar abovecase pressureControls ET and HT25 bar abovecase pressure Rate of pressure change RA maxTo ensure the function of the control, a minimum control pressure pSt min atn 2000 rpm is required depending on the rotational speed and operating pressure. Pressure definitionpnomSingle operating period t1tnMaximum pressure pmaxNominal pressure pnomPressure pPressure p tt2 pTime tMinimum pressure (high-pressure side)Time tTotal operating period t1 t2 . tnNoteOperating pressure range valid when using hydraulicfluids based on mineral oils. Values for other hydraulicfluids, please contact us.Bosch Rexroth AG, RE 93221/05.2014