HY40 Series Axial Piston Pump | HY40S-RP HY40P-LP HY40P-RP | High Pressure Hydraulic Pump

The HY40 Series Axial Piston Pump (including models HY40S-RP, HY40P-LP, and HY40P-RP) offered by LIC Hydraulic is a premier power source for high-pressure hydraulic systems. Featuring a swashplate design, this series is renowned for its excellent self-priming ability, compact footprint, and extended service life. Engineered for 100% Drop-in Interchangeability, our HY40 pumps serve as high-quality replacements for OEM units. We prioritize reliability through 100% simulated load testing, ensuring that each pump maintains superior volumetric efficiency under demanding industrial conditions.

Technical Specifications (Model: HY40 Series)

• Model Series: HY40S / HY40P

• Displacement: 40 cm³/rev

• Nominal Pressure: 31.5 MPa (315 bar)

• Peak Pressure: 40.0 MPa (400 bar)

• Rated Speed: 1500 RPM

• Maximum Speed: 2200 RPM

• Control Options: Pressure Compensated (S), Constant Power (P), or Load Sensing

• Rotation: R (Right-Hand/CW) or L (Left-Hand/CCW)

• Weight: Approx. 32 kg

Key Technical Advantages

• Reinforced Ductile Iron Housing: The pump casing is cast from premium ductile iron, providing exceptional pressure resistance and damping properties to minimize vibration during high-pressure operation.

• Precision-Ground Piston Assembly: The pistons and cylinder blocks are ground to micron tolerances. Advanced surface hardening treatments enhance contamination resistance and minimize frictional loss, ensuring stable volumetric performance.

• Hydrostatic Balanced Slipper Design: The slippers are designed with hydrostatic balance technology to reduce contact stress at large swashplate angles, significantly lowering mechanical wear and extending axial bearing life.

• Low-Noise Port Plate Geometry: The internal valve plate is optimized using fluid dynamics to suppress pressure pulsations, resulting in quiet and smooth operation across the entire pressure range.

Application Areas

• Industrial Machine Tools: Hydraulic power for presses, bending machines, and die-casting equipment.

• Metallurgical Machinery: High-pressure cleaning systems and auxiliary rolling mill circuits.

• Marine Engineering: Drive systems for deck machinery and compact Hydraulic Power Units (HPU).

Expert Maintenance Tips

1. Case Priming: Before the initial startup or after maintenance, always fill the pump housing with clean hydraulic oil via the drain port. Dry running will cause immediate damage to the piston-cylinder interface.

2. Drain Line Backpressure: Ensure the case drain line is connected directly to the tank. Backpressure must not exceed 0.1 MPa (1 bar) to protect the shaft seal and internal components.

3. Suction Port Monitoring: Regularly inspect suction filters to prevent cavitation. The suction vacuum should be maintained above -0.02 MPa for optimal flow integrity.