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A4VSO250DR/30L-PPB25N00 Open Circuit Axial Piston Variable Pump, DR Constant Pressure Control, Made in Germany
Product Description
The Rexroth A4VSO250DR/30L-PPB25N00 is a genuine A4VSO series swashplate axial piston variable pump for open circuit hydraulic systems, manufactured in Germany. It features a nominal displacement of 250 cm³/r with DR (constant pressure / relief) control, rated for 350 bar continuous and 400 bar peak pressure. The DR control maintains a preset pressure level by reducing displacement toward zero once system pressure is reached, making it a reliable and cost-effective solution for press circuits, industrial power units, and general heavy-duty hydraulic applications.
Technical Specifications
Manufacturer
Rexroth, Made in Germany
Series
A4VSO - Open Circuit Axial Piston Variable Pump
Model Code
A4VSO250DR/30L-PPB25N00
Nominal Displacement (Vg max)
250 cm³/r
Nominal Pressure
350 bar
Peak Pressure
400 bar
Maximum Speed (nnom)
Approx. 1500 rpm
Theoretical Flow @1500 rpm
Approx. 375 L/min
Drive Power @350 bar & 1500 rpm
Approx. 219 kW
Control Type
DR - Constant Pressure Control (Pressure Limiter / Relief Function)
Rotation
L - Left-hand (viewed from shaft end)
Mounting Flange & Ports
PPB25 - SAE Flange & SAE Port
Through Drive
N00 - Without Through Drive
Hydraulic Fluid
Mineral Oil HLP, HFC Water-Glycol Permissible (Derated)
Approximate Weight
184 kg
Key Features
Swashplate design with infinitely variable displacement for on-demand flow
DR constant pressure control — pump strokes to zero when set pressure is reached
Rated 350 bar continuous / 400 bar peak for heavy industrial service
Excellent suction characteristics and low noise operation
Robust cast-iron housing with long-life heavy-duty bearings
Compatible with variable speed drive (VSD) systems
Through-drive option available on tandem-ready A4VSO250 variants
Typical Applications
Hydraulic presses and stamping lines
Industrial hydraulic power units (HPU)
Metallurgy - rolling mill auxiliary hydraulics, furnace systems
Test rigs and laboratory hydraulic benches
General heavy industry requiring constant pressure supply
Sales Countries / Regions
Distributed globally through Rexroth's authorized dealer network, including:
Europe: Germany, Italy, France, UK, Spain, Netherlands, Poland, etc.
Asia: China, Japan, South Korea, India, Thailand, Malaysia, Vietnam, Indonesia, etc.
Americas: USA, Canada, Mexico, Brazil
Others: Australia, United Arab Emirates, Saudi Arabia, Turkey, South Africa
Frequently Asked Questions
Q1: What does "DR" control mean on this A4VSO pump?
A1: DR stands for Constant Pressure Control. The pump maintains a preset pressure by reducing its displacement toward zero once system pressure reaches the setpoint — functioning like a pressure-limiting / relief-controlled pump.
Q2: Can this pump be used in a closed circuit (hydrostatic transmission)?
A2: No. The A4VSO series is designed exclusively for open circuit (open loop) systems. For closed circuits, use the A4VG or A4VM series.
Q3: What should be done before first startup?
A3: Fill the pump housing with clean hydraulic oil through the case drain port to purge air before starting. Ensure the case drain line discharges above the tank oil level and verify motor rotation matches the specified left-hand (L) direction.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Total Annual:
1 million-10 millon
Employee Number:
>50
Ecer Certification：
Verified Supplier
Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha... Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha...
