Rexroth A2F Series Hydraulic Piston Pump | A2F160 A2F200 A2F250 | High Pressure Fixed Displacement Pump

The A2F Series axial bent-axis fixed displacement piston pumps from Chengyuan Hydraulic are premium power components designed for open-circuit hydraulic systems. Fully compatible with Rexroth A2F technical specifications (including A2F160, A2F200, and A2F250), these units offer 100% original-place interchangeability. Thanks to the classic bent-axis design, the A2F series excels in self-priming capability, starting torque, and high-pressure durability. Each pump undergoes 100% simulated condition testing, ensuring reliable operation at a rated pressure of 35MPa and peak pressure of 40MPa.

Technical Specifications:

• Representative Models: A2F160W2Z1, A2F200R5P2, A2F250R5P2, A2F160R2P3, A2F28W2Z1

• Displacement Range: $28\text{ cm}^3\text{/rev}$ to $250\text{ cm}^3\text{/rev}$

• Nominal Pressure: $35\text{ MPa (350 bar / 5075 psi)}$

• Peak Pressure: $40\text{ MPa (400 bar / 5800 psi)}$

• Max Speed (Self-priming): $1600\text{–}3000\text{ rpm}$ (depending on size)

• Control Type: Fixed Displacement

• Seals: FKM (Viton) for high temperature and chemical resistance

• Weight: $A2F160 \approx 78\text{ kg} / A2F250 \approx 105\text{ kg}$

Key Technical Advantages:

• Bent-Axis Structural Superiority: The $40\text{°}$ bent-axis design provides lower moment of inertia compared to swashplate pumps. This significantly enhances self-priming speeds and allows for larger bearings to handle higher axial loads.

• Spherical Valve Plate Precision: The cylinder and valve plate utilize high-precision spherical mating technology. This allows for automatic centering and compensation during high-pressure operation, maintaining volumetric efficiency above $95\%$.

• Heavy-Duty Bearing System: Equipped with oversized tapered roller bearings, the A2F series is reinforced against intense vibrations and radial shocks typical of heavy mobile machinery, extending service life by $30\%$ over standard pumps.

• One-Piece Piston Durability: Pistons are forged as a single piece and subjected to specialized surface hardening. This design resists scratching from microscopic contaminants, improving resilience in harsh working environments.

Application Areas:

• Construction Machinery: Main pumps for concrete pump trucks and rotary drilling rig drives.

• Mobile Drives: Travel motors for crawler cranes and hydraulic systems for motor graders.

• Industrial Presses: Scrap metal balers and heavy-duty hydraulic power units.

Expert Maintenance Tips:

• Suction Pressure Management: While the A2F has excellent self-priming, suction pressure must be maintained above $0.8\text{ bar}$ absolute. Prevent air ingestion to avoid cavitation damage to the valve plate.

• Initial Priming: Before the first startup, fill the pump case with clean hydraulic oil through the bleed port to ensure all bearings and slippers are lubricated.

• Oil Cleanliness: Maintain system filtration at $10\mu\text{m}$ and oil cleanliness at NAS 8 or better to maximize the high-pressure pump’s operational lifespan.