A7V160 A7V107 A7V250 Rexroth Series Variable Displacement Pump | High-Pressure Plunger Pump

The A7V Series from Chengyuan Hydraulic is a high-performance variable displacement plunger pump featuring the proven bent-axis design. Engineered for open-circuit hydrostatic drives, it provides precise flow control by adjusting the cylinder body angle. We guarantee 100% physical and functional interchangeability with Rexroth A7V Series 2.0/5.0. Every unit is subjected to 100% dynamic simulation testing at rated pressures up to $350\text{ bar}$, ensuring OEM-level performance, superior volumetric efficiency, and exceptional durability for heavy-duty industrial applications.

Technical Specifications (Bulleted List)

• Models: A7V58, A7V78, A7V107, A7V117, A7V160, A7V250

• Displacement Range: $58\text{ cc/rev}$ to $250\text{ cc/rev}$

• Nominal Pressure: $35\text{ MPa (350 bar)}$

• Peak Pressure: $40\text{ MPa (400 bar)}$

• Control Types: LV (Constant Power), DR (Pressure Control), HD (Hydraulic Pilot), MA (Manual)

• Rotation: Clockwise (R) or Counter-clockwise (L)

• Seals: High-grade Viton (FKM) for chemical and thermal resistance

• Mounting: Standard ISO / SAE flanges for seamless integration

Key Technical Advantages

• Bent-Axis Efficiency: The bent-axis geometry allows for a more compact design with higher self-priming speeds and a superior power-to-weight ratio compared to swashplate designs.

• Spherical Valve Plate: Features a precision-engineered spherical distribution surface that enables automatic centering of the cylinder block, minimizing friction and maintaining maximum volumetric efficiency under high-pressure spikes.

• Heavy-Duty Tapered Roller Bearings: Equipped with oversized bearings designed to handle significant axial and radial loads, ensuring a long service life even in the most punishing environments.

• Precision-Engineered Pistons: Pistons undergo specialized heat treatment and surface coating to reduce wear and heat generation, preventing “seizure” during rapid pressure fluctuations or varied oil viscosities.

Application Areas

• Construction Machinery: Main pumps for excavators, rotary drilling rigs, and vibratory rollers.

• Mining Operations: Hydraulic power units for heavy winches, conveyors, and tunneling machines.

• Industrial Plants: Power systems for large hydraulic presses, injection molding machines, and scrap metal balers.

Expert Maintenance Tips

• Case Priming: Before the initial startup, the pump housing must be filled with clean, filtered hydraulic fluid via the drain port to prevent dry-run damage to the bent-axis assembly.

• Suction Integrity: Ensure the inlet absolute pressure does not drop below $0.8\text{ bar}$ to avoid cavitation at high rotational speeds.

• Filtration Management: To protect the critical spherical valve interface, maintain a system filtration level of at least $10\text{ }\mu\text{m}$ and perform regular oil analysis to monitor contamination.