REXROTH A8VO  Hydraulic Pump – Specifications & Model Explanation

1. Model Explanation

• The series is dedicated to open-loop hydraulic systems, offering flexible control options to accommodate the rigorous load and speed adjustment requirements of large-scale mobile and industrial equipment.
• Adopting high-strength cast iron housing and wear-resistant fluororubber seals, it demonstrates excellent adaptability to harsh working conditions such as high temperature, heavy dust, and intense vibration, significantly extending service life.
• Optional integrated components include pressure relief valves, anti-cavitation valves, and servo control cylinders. These configurations must be specified in the model’s configuration code to align with system-specific operational needs.
• Interface specifications cover SAE flanges (series 32, 63) and metric fine-thread ports, with the specific type and rotation direction clearly encoded in the middle section of the model.

• A8VO: Series identifier (open-loop swashplate-type axial piston variable pump for heavy-duty applications)
• 80: Rated displacement (80 cm³/r, corresponding to maximum swashplate angle)
• DR: Control mode (pressure-compensated proportional control with manual override function)
• 63R: Interface & rotation direction (63-series SAE flange, right-hand rotation of drive shaft)
• VZB01: Configuration code (standard mounting dimension, no integrated valve, general-purpose seal material)

2. Core Specifications

2.1 Displacement Range

• Standard Models: 55 cm³/r to 250 cm³/r (covering A8VO55, A8VO80, A8VO107, A8VO160, A8VO250, etc.)
• Stepless Adjustment: Displacement is continuously adjustable via swashplate angle regulation, enabling precise flow matching with variable load demands of heavy-duty equipment.

2.2 Operating Pressure

• Nominal Pressure: 32 MPa (4641 PSI) for all displacement models, ensuring stable performance under heavy loads.
• Peak Pressure: 40 MPa (5802 PSI) for short-term operation (≤10 minutes, non-recurrent) to handle occasional overload conditions.

2.3 Speed Range

• Rated Speed: 1500 – 2500 rpm (varies slightly by displacement, optimized for diesel engine matching)
• Minimum Stable Speed: ≥80 rpm (no cavitation, ensuring smooth startup and low-speed operation of heavy machinery)
• Maximum Allowable Speed: 3000 rpm (continuous operation for models ≤160 cm³/r); 2800 rpm for models >160 cm³/r to protect shaft bearings.

2.4 Other Key Parameters

• Noise Level: ≤70 dB (at rated speed and nominal pressure, lower than industry average for heavy-duty pumps)
• Working Temperature: -20℃ to 95℃ (hydraulic oil temperature); recommended operating range 15℃ – 60℃ for optimal efficiency and seal life.
• Hydraulic Oil Compatibility: Mineral oil (complying with DIN 51524), synthetic hydraulic oil, and biodegradable hydraulic oil for eco-sensitive applications.
• Drive Shaft Load Capacity: Radial load ≤ 3500 N; Axial load ≤ 1500 N, enhancing durability under heavy-duty drive conditions.

3. Product Features

• Heavy-Duty Open-Loop Design: Optimized for high-pressure, high-load open hydraulic systems, featuring enhanced oil suction capacity and stable flow output, suitable for equipment requiring independent oil tank circulation.
• Versatile Control Modes: Supports pressure compensation control (DR), flow control (LR), electric proportional control (EP), and mechanical manual control, adapting to both manual operation and automated control systems of modern machinery.
• Enhanced Structural Durability: Equipped with high-precision hardened swashplate, wear-resistant cylinder block, and reinforced plungers, ensuring reliable operation under extreme pressure and heavy-load conditions with minimal maintenance.
• Efficient Power Transmission: Adopts spherical port plate design for automatic centering, reducing internal leakage and improving energy efficiency to over 91% at rated working conditions, lowering fuel consumption of host equipment.
• Global Certification & Compatibility: Complies with CE, UL, and ISO 9001 standards, compatible with international hydraulic system configurations, suitable for global heavy machinery markets.
• Wide Heavy-Duty Application: Ideal for large construction machinery (mining excavators, wheel loaders), port cranes, metallurgical equipment, and heavy industrial hydraulic systems requiring high reliability.