Rexroth A2F12 Series Axial Piston Fixed Pump | A2F12W3P1 Plunger Pump | High Pressure

The A2F Series axial piston fixed pumps by Chengyuan Hydraulic are high-pressure bent-axis components fully compatible with Rexroth industrial standards. The A2F series (centered on the A2F12 model) utilizes the classic bent-axis design to provide a compact footprint with exceptional self-priming capabilities and a wide speed range. As Chengyuan’s premier replacement solution, every A2F pump undergoes 100% simulated condition testing to verify volumetric efficiency and thermal performance under high pressure, ensuring 100% original-place interchangeability.

Technical Specifications :

• Model Code: A2F12W3P1 (W: Mineral Oil; 3: Series 3; P: Keyed Shaft/S: Splined; 1: NBR Seals)

• Displacement: $11.6\text{ cm}^3/\text{rev}$

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

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

• Max Speed (Self-priming): $3150\text{ rpm}$

• Max Flow Rate: Approx. $36\text{ L/min}$ at rated speed

• Control Type: Fixed Displacement

• Housing Material: High-tensile cast iron

• Weight: Approx. $6.5\text{ kg}$

Key Technical Advantages:

• Superior Bent-Axis Efficiency: The A2F series features a spherical valve plate and bent-axis piston arrangement. This design virtually eliminates lateral forces on the pistons, drastically reducing mechanical wear and maintaining over $95\%$ volumetric efficiency even at $350\text{ bar}$.

• Excellent Self-Priming Capability: Thanks to its unique rotating group configuration, the A2F12 pump possesses strong suction performance in open circuits without pre-charge. This makes it ideal as a primary power source or high-pressure auxiliary pump for mobile machinery.

• Extended Bearing Life: Equipped with heavy-duty anti-friction bearings designed to withstand high axial and radial loads. Combined with precision-ground piston assemblies, it ensures long service intervals under harsh conditions.

• Compact Modular Design: At only $6.5\text{ kg}$, the A2F12 is exceptionally lightweight. Its flanges and shaft ends fully comply with ISO/SAE standards, simplifying system integration and allowing for direct replacement of legacy units without manifold modification.

Application Areas:

• Mobile Machinery: Pilot oil supply for mini-excavators and paver drive systems.

• Industrial Presses: High-pressure auxiliary circuits for small hydraulic presses and balers.

• Marine & Lifting: Winch drive auxiliary systems and crane hydraulic brake control.

Expert Maintenance Tips:

• Case Venting Procedure: Before initial startup, the pump case must be filled with clean hydraulic oil through the highest vent port. The bent-axis structure is highly precise; dry friction will cause immediate catastrophic damage.

• Fluid Cleanliness Standard: As a high-pressure pump, it is extremely sensitive to particulate contamination. Systems must use filters no coarser than $10\mu\text{m}$ to maintain cleanliness at ISO 4406 18/16/13 or better.

• Inlet Sealing: Always check the integrity of the suction line. Even a minute air leak can cause cavitation, resulting in severe noise and premature valve plate failure.