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Product Description
Rexroth A4VG250 High-Pressure Hydraulic Pump for Railway Rail Cars
Product Overview: The Rexroth A4VG250 Series is the premier power core engineered for hydrostatic transmissions in heavy-duty mobile machinery and Railway Rail Cars. This featured model, A4VG250EP4D1/32R-NTD10F721DP, utilizes an axial piston swashplate design specifically optimized for closed-circuit operations. Known for its elite power density and integrated charge pump, this series combines advanced EP (Electric Proportional Control) technology to deliver precise, smooth, and reliable torque for rail traction, large-scale track maintenance machinery, and heavy-duty mining vehicles.
Key Technical Advantages:
Railway-Grade Reliability: Structurally reinforced for the long-duration, high-load cycles typical of rail environments, ensuring exceptionally low failure rates even under extreme operational pressures.
Precision EP Proportional Control: Equipped with the EP4 Electronic Control module, allowing for millisecond-level adjustment of swashplate displacement for smooth acceleration and seamless direction reversals.
Fully Integrated Closed-Loop Design: Features an on-board charge pump, high-pressure relief valves, charge pressure relief valves, and control valves, drastically simplifying system plumbing.
Superior Power-to-Weight Ratio: The massive 250cc displacement output combined with a compact footprint provides high power density for locomotive engine compartments where space is a premium.
Efficient Bidirectional Flow: Supports full bidirectional flow output, enabling forward and reverse transitions without changing input shaft rotation while maintaining peak volumetric efficiency.
Detailed Models & Parameters:
Core Series: Rexroth A4VG Series 32 (High Pressure).
Full Model Code: A4VG250EP4D1/32R-NTD10F721DP.
Displacement: 250 cm³/rev.
Control Type: EP (Electric Proportional Control) with Pressure Cut-off.
Pressure Ratings: Rated at 400 Bar (5800 PSI) continuous; Peak capability up to 450 Bar.
Rotation: R (Clockwise/CW).
Seals: High-performance FKM (Viton) for high-temperature durability and aging resistance.
Target Applications: Locomotive hydrostatic drives, heavy rail maintenance machinery, mining trucks, and marine engineering equipment.
Company Profile
We adhere to international quality management standards and provide a 1-year warranty including maintenance and replacement. We have established long-term strategic cooperation with many well-known brands and continuously launch new products to meet market development. Flexible payment terms are supported, including USD settlement, Alipay, Western Union and T/T.
Relying on our standardized production base and professional foreign trade team, we provide competitive factory direct prices, efficient logistics channels and punctual delivery. FJZY Hydraulic is devoted to being your trustworthy long-term partner in hydraulic and agricultural machinery fields.
Our Advantages
Fast & Reliable Delivery
Extensive Partnerships
We collaborate with numerous factories, offering a wide range of product selections and providing you with instant quote responses
Strict Quality Assurance
Quality first is our principle. We provide a one-year warranty service, ensuring you receive top-tier quality products with confidence.
Competitive Pricing
Through efficient production and close cooperation, we offer highly competitive prices, guaranteeing a cost-effective experience for you.
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