Specifications, features, and control methods of Rexroth A4VSO piston pumps

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One of the common models of Rexroth piston pumps is the Rexroth A4VSO series of piston pumps. The standard sizes for these pumps are 40, 71, 125, 180, 250, 355, and 500. The nominal pressure is 350 bar, while the peak pressure reaches 400 bar. They come in open-loop configurations with axial pistons; the 1-series and 3-series models feature long bearing lifespans. There is a wide range of controllers and actuators available. Pumps with the same specifications can be combined to form multi-pump systems. If their performance parameters are the same as those in mineral oil mode (sizes 180 to 355), they can also operate using HFC fluids. Key features: ◆ It is an axial piston variable pump with a swashplate design, specifically engineered for efficient hydraulic drive in open-loop systems. ◆ Widely used in industries such as ceramic presses, refractory material presses, steel and forging presses, metallurgical machinery, mining machinery, marine machinery, petroleum equipment, engineering equipment, and machine tool control ； ◆Displacement specifications: 40, 71, 125, 180, 250, 300, 355, 500, 750 milliliters per revolution ； ◆ With swashplate angle indicator ； ◆ Excellent inhalation properties ； ◆ Control response is sensitive ； ◆ Specially designed, long-lasting, high-precision aviation-grade full-roller bearings ； ◆ Low noise, long lifespan, excellent power-to-weight ratio ； ◆ Shaft-through design, capable of being stacked to form a combined pump ； ◆ The flow rate of a hydraulic pump is proportional to the pump’s speed and displacement; adjusting the inclination angle of the swash plate allows for stepless adjustment of the displacement ； ◆ The variable types are comprehensive; the commonly used ones include DR/DRG constant voltage control, LR hyperbolic constant power automatic control, and EO2 electrical proportional control ； ◆ The rated operating pressure can reach 350 Bar (35 MPa), with a peak pressure of 420 Bar (42 MPa) ； ◆ Applicable media: mineral oil, water-ethanol glycol; cleanliness requirement: NAS9 level ； A: Series: Series 10, 11, and 30
B: Specifications: 40, 71, 125, 180, 250, 355, 500, 750, 1000
C: Control method selection: DR – Pressure control; FR – Flow control; LR – Hyperbolic power control; MA – Manual control; EM – Electric motor control; HW – Hydraulic control, position-dependent; HM – Hydraulic control, flow-dependent; HS – Hydraulic control, with servo/proportional valve; EO – Electronic control; EO2 – Electronic control; HD – Hydraulic control, pressure-dependent; DS – Speed control, secondary control