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Rexroth A4VSO250LR/30R-PZB25U24 (R900580381) Axial Piston Hydraulic Pump

Product Overview

This is a swashplate variable displacement axial piston pump for open-circuit high-pressure industrial hydraulics, genuine Bosch Rexroth part with material number R900580381. It features LR constant-power control, right-hand flange mounting and PZB25 electro-hydraulic proportional displacement regulator with 24V solenoid valve.

Core Specifications

Displacement: 250 cm³/r

Nominal pressure: 350 bar, peak pressure: 400 bar

Max speed: 1500–1800 rpm

Control mode: LR constant power control + 24VDC proportional electric control

Mounting: 30R flange, right rotation

Wide compatibility with mineral oil and HF fire-resistant hydraulic fluids

Low noise, excellent suction performance, long service bearing design

Main Functions

Infinitely adjust output flow via swashplate angle; constant power control limits drive load to avoid motor overload; proportional electric control receives analog signals for stepless flow regulation; built-in pressure protection safeguards system against overpressure.

Key Advantages

Modular integrated proportional regulator simplifies electrical control layout; through-drive design allows tandem pump combination; robust high-pressure structure fits continuous heavy-duty operation; visual swivel angle indicator for on-site debugging.

Typical Applications

Metallurgical forging presses, aluminum extrusion equipment, mining machinery, ship hydraulic systems, large injection molding machines, tunnel boring machine main hydraulic power units.