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Help CenterEaton Vickers PVXS-250-M-R-DF-0000-000 Variable Displacement Piston Pump
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Eaton Vickers PVXS-250-M-R-DF-0000-000 Variable Displacement Piston Pump
Overview
The Eaton Vickers PVXS-250-M-R-DF-0000-000 is a high-performance, heavy-duty, variable displacement axial piston pump from Eaton‘s Hydrokraft PVXS series. Designed for open-loop industrial hydraulic systems, this pump offers exceptional reliability, high pressure capability, and intelligent pressure-compensated flow control, making it a versatile and durable power source for the most demanding applications. As the largest displacement model in the PVXS series, it is engineered to deliver consistent performance under extreme loads.
Technical Features
Swashplate Axial Piston Design – The pump features a robust swashplate design that ensures high reliability and a long service life. Its heavy-duty construction includes enlarged shafts and bearings to enhance durability and withstand high loads.
Displacement & Pressure Ratings – With a nominal displacement of 250 mL/rev (approximately 250 cm³/r, it is the largest pump in its series. It has a rated pressure of 350 bar and a maximum working pressure of 420 bar (6,090 psi).
DF Dual-Function Control – The “DF“ in the model code indicates a pressure-compensated, flow-controlled (load-sensing) control. This intelligent control automatically adjusts the pump's displacement in response to system pressure and flow demands, delivering only the flow required by the load to save energy.
High Performance & Durability – The pump is designed for high performance, with a rated speed up to 1800 min⁻¹ or higher. Its rotating and pressure-loaded components are pressure-balanced for enhanced stability and longevity.
Modular Design & Versatility – The “building block“ modular design allows for a wide range of applications and configurations. The pump is also available with integrated pilot pumps, filters, and pressure relief valves.
Robust Construction – Built with a cast iron housing, the pump can handle high-pressure systems and is suitable for use with petroleum-based and synthetic hydraulic fluids.
Core Functionalities
Variable Displacement Flow Control – As a variable displacement pump, its output flow is automatically adjusted to precisely match the system‘s demand. This provides efficient hydraulic power when needed and reduces energy waste during idle periods.
Pressure Compensator & Load-Sensing – The DF control system integrates pressure compensation and load-sensing. It maintains a stable system pressure and adjusts the flow output based on the actual load requirements, ensuring consistent performance and protecting system components.
High System Stability – The pressure-balanced design and robust construction reduce pressure fluctuations and shocks in the hydraulic system, enhancing stability and extending the lifespan of system components.
Energy-Efficient Operation – By automatically reducing displacement during periods of low demand, the pump minimizes power loss and heat generation, contributing to significant energy savings and reduced operating costs.
Reliable and Low Maintenance – The robust design, high-quality materials, and simple structure ensure reliable operation with minimal maintenance, reducing downtime and total cost of ownership.
Application Sectors
The Eaton Vickers PVXS-250 is widely used across heavy industries that require reliable, high-pressure hydraulic power in open-circuit systems. Its primary applications include, but are not limited to:
Steel & Metallurgy – Powering hydraulic systems in rolling mills, continuous casting lines, and other steel mill equipment.
Construction Machinery – Providing hydraulic power for excavators, loaders, cranes, and other heavy equipment.
Mining – Driving crushers, screening machines, and other equipment that must withstand high loads and ensure stable operation.
Marine & Offshore – Applied in ship hydraulic systems and other marine equipment.
Power Generation – Used in hydraulic systems for power plants, including EH oil systems for turbine control.
Oil & Gas – Serving as a hydraulic power source for various drilling and processing equipment.
Aerospace – Employed in ground test equipment and other hydraulic applications requiring precise control.
General Industrial Hydraulics – Powering hydraulic presses, test rigs, and a wide range of other industrial machinery.
Performance Specifications
| Specification | Value |
|---|---|
| Manufacturer | Eaton Vickers (now Danfoss) |
| Series | Hydrokraft PVXS |
| Model Code | PVXS-250-M-R-DF-0000-000 |
| Product Type | Variable displacement axial piston pump |
| Circuit Type | Open circuit |
| Maximum Displacement | 250 mL/rev (250 cm³/rev) |
| Rated Pressure | 350 bar (5,076 psi) |
| Maximum Working Pressure | 420 bar (6,090 psi) |
| Rated Speed | 1800 min⁻¹ (or higher) |
| Rotation Direction | Clockwise (R) |
| Weight | Approx. 212 kg (467 lbs) |
| Housing Material | Cast iron |
| Control Type | DF – Pressure compensation + Flow control |
Conclusion
The Eaton Vickers PVXS-250-M-R-DF-0000-000 is a reliable, efficient, and exceptionally durable variable displacement axial piston pump. With its 250 mL/rev displacement, pressure capability up to 420 bar, and intelligent DF pressure-compensated flow control, it delivers precise, energy-efficient hydraulic power for the most demanding industrial applications. Its robust construction, modular design, and high-performance characteristics make it an ideal solution for steel mills, construction equipment, mining machinery, marine systems, power generation, and general industrial hydraulics.
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