Bokin Electro-Hydraulic Technology (Foshan) Co., Ltd. is one of the leading manufacturers and suppliers of hydraulic axial piston pump a4vso250 dr direct control in China. If you're going to wholesale bulk durable hydraulic axial piston pump a4vso250 dr direct control made in China, welcome to get pricelist from our factory. All customized products are with high quality and competitive price.
Product Parameters
▶ Robust high-pressure pump for industrial applications
▶ Size 250
▶ Nominal pressure 350 bar
▶ Maximum pressure 400 bar
▶ Open circuit
Features
▶ Variable displacement pump with axial piston rotary group of swashplate design for hydrostatic drives in open circuit
▶ Flow is proportional to the drive speed and displacement.
▶ The flow can be continuously changed by adjusting the swashplate.
▶ Excellent suction characteristics
▶ Low noise level
▶ With pre-compression volume for pressure pulsation reduction
▶ Nominal pressure 380 bar / maximum pressure 420 bar for selected control devices with port plate 36.
▶ Long service life
▶ Modular design
▶ Variable through drive options
▶ Optical swivel angle indicator
▶ Any installation position possible
▶ Suitable for variable-speed drives
▶ HF operation with reduced data possible for HFC operation, special version available
▶ Direct control (DR) function for precise and responsive pressure/flow regulation in industrial systems
Hydraulic Axial Piston Pump A4VSO250 DR Direct Control Complete Model
A A4VSO 250 DR/30R-PPB13N00
Technical Specifications
|
Available Size |
A4VSO40 |
A4VSO71 |
A4VSO125 |
A4VSO180 |
A4VSO250 |
|
Series |
1X |
||||
|
Nominal Pressure |
350 / 380 bar |
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|
Maximum Pressure |
400 / 420 bar |
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Product Advantages
Core Positioning
Rexroth's flagship ultra-heavy-duty axial piston pump with DR direct pressure control, built to handle extreme loads and high flow demands in large-scale industrial systems. Its rugged construction and precision pressure regulation set the standard for reliability in the most demanding hydraulic applications.
Key Performance Metrics
Geometric displacement of 250 cm³/rev, nominal speed of 1500 rpm. Delivers 375 l/min rated flow (max 870 l/min) at full displacement, with a nominal pressure of 350 bar (max 400 bar). Port plate 36 option boosts nominal pressure to 380 bar and max pressure to 420 bar, with a maximum power output of 219 kW (Δp=350 bar), making it suitable for ultra-heavy-duty tasks.
Direct Pressure Control Excellence
The DR controller maintains pressure deviation within ≤3 bar, automatically adjusting displacement to match load demands. Mechanical stops set Vg min to 15–20 bar (when port B is plugged) and Vg max to nominal capacity, preventing system overload. Exceptional rotary stiffness (527 kNm/rad at shaft end P) ensures stability under dynamic loads, while a built-in swivel angle indicator enables visual displacement monitoring. Pre-compression volume minimizes pressure pulsation, enhancing system stability.
Structural & Installation Details
Weighs 184 kg, featuring an ISO 3019-2 4-hole flange (Ø224) for secure mounting. SAE J518 ports (3 in suction, 1.5 in pressure) come with M16×2 metric threads. Through-drive options enable combination pump setups (A4VSO250+A4VSO250) with a total length of 904 mm, optimizing space utilization. The M42×2 R(L) drain port must be connected to the reservoir, with separate drain lines recommended for combination pumps to avoid case pressure overload.
Durability & Reliability Features
FKM seals ensure compatibility with mineral oils and flame-resistant fluids (HFDU/HFDR), operating within a -20~+80°C temperature range (viscosity 20–380 mm²/s). Bearing flushing (10 l/min recommended) is advised for special fluids or extreme temperatures. Withstands 2000 N maximum radial force and 1800 N axial force, ensuring durability in harsh operating conditions. Case pressure is limited to 4 bar absolute (6 bar peak) to protect shaft seals.
Industry Applications
Designed for large hydraulic forging presses, mining machinery, industrial power units, and steel mill hydraulics. Excels in heavy construction equipment, offshore hydraulic systems, and large-scale manufacturing machinery requiring ultra-high power, direct pressure control, and variable displacement.
Our Advantage
CORE TECHNOLOGY
20+ years R&D experience, industry expert-led, independent IP rights
CORE IP PRODUCT
4WREE, 4WRKE, 4WRJE, 4WRLE, 4WRPEH, etc
OUTPUT
Proportional valve monthly output >10000+ pieces
BRAND
100% independent proportional valve brand, supporting brand customization
CUSTOMIZED ELECTRO-HYDRAULIC SYSTEM SOLUTIONS FOR ALL APPLICATIONS
Integrating core component development, system design and customized Implementation Services
APPLICATION FIELDS
• Precision Injection Molding
• Die Casting
• Metallurgy & Foundry
• New Energy
FAQ
Q: What core proportional valve series do you focus on, and what are their key features?
A: Our core proportional valve series include 4WREE, 4WRPEH, 4WRKE, 4WRJE, 4WRLE, 4WRAE, 4WRZE, 4WRZ, and 4WRTE. These valves cover direct-acting and pilot-operated types, with working pressure up to 350 bar and flow rates ranging from 12 L/min to 1000 L/min. They feature precise flow/pressure control, fast response, and compatibility with industrial automation systems, meeting diverse hydraulic control needs.
Q: What displacement options are available for the A4VSO and A10VSO axial piston pumps?
A: The A4VSO series offers displacements from small to large (e.g., 40 cm³/rev to 250 cm³/rev), while the A10VSO series covers 10 cm³/rev to 140 cm³/rev. Both series support nominal pressure up to 350 bar, with maximum flows reaching 450 L/min (A4VSO250) and 128 L/min (A10VSO71), suitable for hydraulic systems of different scales.
Q: What are the key specifications of the PGX single pump?
A: The PGX single pump is a fixed-displacement internal gear pump with specifications including 1H (008-025 cm³/rev), 2H (025-063 cm³/rev), and 3H (080-160 cm³/rev) series. It features axial and radial pressure compensation, maximum operating pressure of 35 MPa, and speed range of 200-3000 r/min, with ultra-low noise and long service life.
Q: What distinguishes the 4WRLE series proportional valves in your product line?
A: The 4WRLE series is a high-flow pilot-operated proportional directional valve with rated flows of 200-250 L/min (size 16) and 60-100 L/min (size 10). It supports IO-Link communication for intelligent control, with 350 bar working pressure, making it ideal for large-scale industrial equipment like injection molding machines and heavy machinery.
Q: What performance parameters do the ITM and ITMH hydraulic motors offer?
A: The ITM series (ITM03/06/08/11) has a displacement range of 64-4828 ml/r, torque up to 10584 N.m, and working pressure of 12-25 MPa. The ITMH series (ITMH01/03) supports 20-22 MPa pressure and 6-151 kW power, both featuring planetary gear structures for durability, suitable for harsh industrial and marine applications.
Q: How does the 4WRZE series proportional valve meet precision control requirements?
A: The 4WRZE series is a pilot-operated proportional directional valve with on-board electronics (OBE), supporting 10V (A1) and 4-20mA (F1) control signals. It has low hysteresis (<6%), stable flow/pressure output, and maximum flow up to 1600 L/min (size 32), ensuring precise control for automated production lines.
Q: What application scenarios are the 4WRPEH series valves designed for?
A: The 4WRPEH series is a direct-acting high-response proportional valve with rated flows of 12-100 L/min. It adopts servo-quality design, suitable for precision injection molding machines, die casting equipment, and electronic component assembly lines, where fast response and low flow pulsation are critical.
Q: What advantages does the 4WREE series offer for small to medium hydraulic systems?
A: The 4WREE series is a direct-acting proportional valve with maximum flow of 80 L/min (size 6) and 25-75 L/min (size 10), working pressure 350 bar. It features compact structure, low power consumption, and fast response time, ideal for small to medium hydraulic systems like material handling vehicles and precision machinery.
Q: Can the 4WRKE series valves handle extreme working conditions?
A: Yes, the 4WRKE series is a high-performance pilot-operated proportional valve with maximum flow of 1000 L/min (size 27) and 4700 L/min (size 35), working pressure 350 bar. It is designed for heavy-duty applications like steel mills and mining machinery, with robust construction and reliable performance under high pressure and high flow.
Q: What customization options are available for the A4VSO and A10VSO pumps?
A: The A4VSO and A10VSO pumps support customization of control modes (DR/DRG/FR), installation flanges (SAE-A/B/C), and shaft types (flat key/spline). We also offer combination pump configurations and special seal materials (FKM/NBR) for different hydraulic fluids, adapting to specific application requirements.
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