Axial Piston Variable Pump A7VO - Group VH A/S

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Blocked for new applications / Für Neuanwendung gesperrt10/32 Bosch Rexroth AG <strong>A7VO</strong> RE 92 202/03.06DR Pressure ControlThe pressure control keeps the pressure in a hydraulic systemconstant within its control range even under varying flow conditions.The variable pump only moves as much hydraulic fluid asis required by the actuators. If the operating pressure exceedsthe setpoint set at the integral pressure control valve, the pumpdisplacement is automatically swivelled back until the pressuredeviation is corrected.In zero pressure non-running condition, the pump is swivelledto its starting position V g max by means of the control spring.Setting range for pressure control _____________50 – 350 barWhen ordering, state in clear text the setting of the pressurecontrol.Note:– The version with pressure control DR necesitates a leakagefluid line from port T 1 to the tank.– Any pressure relief valve included in the circuit to limit themax. pressure must be set to a cracking pressure at least 20bar above the pressure control setting.Zero stroke operationThe standard pump unit is designed for intermittent constantpressure operation. Short-term operation at zero stroke (< 10min.) is permissible up to a operating pressure p max = 315 barat a tank temperature of ≤ 50°C.For long-term periods of zero stroke operation, port U shouldbe used for bearing flushing.Flushing portURSCharacteristic DROperating pressure pB in barSetting range350max50minmax. 10 barFlushing flow (recommended)Size 28 55 80 107 160q v flush (L/min) 3 4 6 8 12Temperatur of flushing fluid ≤ tank temperaturFlow q v in L/minCircuit diagram DRURB (A)V g minV g maxA1X3T1S
Blocked for new applications / Für Neuanwendung gesperrtRE 92 202/03.06 <strong>A7VO</strong> Bosch Rexroth AG 11/32DR Pressure ControlDRG Pressure control, remote controlledA sequence valve with port plate takes over the function of thepressure cut-off. The valve is mounted separate from the pump,and the simple piping length should not exceed 5 m. Highpressure is supplied from the pump to the valve via port A 1 , andthe valve control pressure is fed back to the pump via port X 3 ,causing the pump to swivel back towards V g min . Port T of thesequence valve and port T 1 of the pump must be connectedback to tank (cooler).Setting range for pressure control _____________ 50 – 315 barWhen ordering, state in clear text the setting of the pressurecontrol.Note:– Any pressure relief valve included in the circuit to limit themax. pressure must be set to a cracking pressure at least 20bar above the pressure control setting.The sequence valve and port plate must be ordered separately.Sequence valve: DZ5DP2-1X/315YMSO21(Mat.No. R900495604)Port plate: G 115/1 (Mat.No. R900424379)Characteristic DRGOperating pressure pB in barSetting range31550maxminmax. 10 barFlow q v in L/minCircuit diagram DRG(1)URB (A)PATV g minV g maxA1X3T1SPosition (1) is not included in the pump supply.
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Axial Piston Variable Pump A7VO - Group VH A/S

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