Eaton Vickers Hydraulic Pump PVB90-LS-20-C-11 Specification Document

1. Product Overview

2. Model Interpretation

• PVB: Series Identification – Indicates the PVB series variable displacement piston pump, a classic product line of Eaton Vickers known for its compact design and high reliability.
• 90: Displacement Code – Represents the nominal displacement of the pump, with a value of 90 cm³/rev (cubic centimeters per revolution), indicating the volume of fluid delivered per full rotation of the pump shaft.
• LS: Control Type – Stands for Load Sensing control, a key feature that adjusts the pump’s flow output according to the system’s actual load demand. This control mode significantly reduces energy consumption and heat generation, improving the overall efficiency of the hydraulic system.
• 20: Mounting Flange Code – Specifies the mounting flange standard, corresponding to SAE J744 Type 20, ensuring compatibility with standard hydraulic system installations.
• C: Shaft End Code – Indicates the shaft end configuration, with “C” representing a standard straight shaft (keyed), suitable for direct connection with motors or other power sources.
• 11: Seal Type Code – Denotes the seal material and design, with “11” indicating a standard nitrile rubber seal, which offers good resistance to mineral oils and general hydraulic fluids.

3. Technical Specifications

4. Key Features

• Load Sensing Control: The LS control system enables the pump to automatically adjust flow output based on the system’s load demand, minimizing energy waste and reducing system heat, which extends the service life of hydraulic components.
• High Pressure Resistance: With a maximum operating pressure of 350 bar, the pump can handle heavy-duty working conditions, ensuring stable performance in high-pressure hydraulic systems such as construction machinery and industrial presses.
• Robust Construction: The pump is made of high-strength alloy materials, with precision-machined pistons and cylinder blocks, ensuring high wear resistance and long service life even in harsh environments.
• Easy Installation and Maintenance: The standard mounting flange and shaft configuration facilitate easy integration into existing hydraulic systems, while the modular design simplifies disassembly and maintenance, reducing downtime.
• Wide Fluid Compatibility: Compatible with most common hydraulic fluids, including mineral oils and synthetic oils, enhancing the pump’s adaptability to different application scenarios.

5. Application Fields

• Construction machinery (excavators, loaders, cranes)
• Industrial machinery (injection molding machines, hydraulic presses, conveyor systems)
• Aerospace ground support equipment
• Marine hydraulic systems
• Mining equipment
• Agricultural machinery (large tractors, harvesters)

6. Maintenance Recommendations

• Regularly check the hydraulic fluid level and quality, and replace the fluid according to the system’s operating requirements (typically every 2000 operating hours or 6 months, whichever comes first).
• Inspect the pump’s seals and gaskets for leaks regularly; replace damaged seals promptly to avoid fluid loss and system damage.
• Ensure the pump is properly lubricated; check the lubrication system regularly to prevent dry friction and component wear.
• Avoid operating the pump beyond its maximum pressure and speed limits, as this may cause premature failure.
• Store the pump in a clean, dry environment when not in use, and protect the shaft and flange from damage.

7. Safety Notes

• Ensure the hydraulic system is depressurized before disassembly or maintenance to avoid accidental fluid ejection and personal injury.
• Wear appropriate personal protective equipment (PPE), such as gloves, goggles, and protective clothing, when handling hydraulic fluids or working on the pump.
• Follow the manufacturer’s recommended torque specifications when installing or tightening components to prevent damage to the pump or system.
• Do not modify the pump’s control system or structural components without authorization, as this may affect its performance and safety.
• In case of abnormal noise, vibration, or overheating during operation, stop the system immediately and inspect the pump for faults.