YUKEN A145 Piston Pump

Overview

The YUKEN A145 is a flagship high-displacement model in the A Series 28MPa variable piston pump lineup, engineered specifically for ultra-heavy-duty industrial applications requiring massive fluid output and stable high-pressure performance. As a core product of YUKEN—Japan’s leading hydraulic component manufacturer with over 60 years of expertise—the A145 integrates robust structural design, energy-efficient variable control, and exceptional durability to meet the most demanding fluid power needs in heavy machinery and large-scale production systems.

Core Technical Specifications

1. Displacement & Flow Performance

• Displacement: 145 cm³/rev (largest in A Series, optimized for high-flow scenarios)
• Rated Flow: 261 L/min (at 1800 rpm, 28 MPa)
• Maximum Flow: 522 L/min (at 3600 rpm, peak operating speed)
• Flow Adjustment Range: 0～522 L/min (stepless regulation via swashplate angle control)

2. Pressure & Speed Capabilities

• Maximum Working Pressure: 28 MPa (sustained operation for ultra-high-pressure processes)
• Adjustable Pressure Range: 1.2～28 MPa (precise pressure matching for heavy-load cycles)
• Rated Speed: 1800 rpm
• Operating Speed Range: 600～3600 rpm (supports both high-speed rapid actuation and low-speed pressure holding)
• Overload Capacity: Withstands 110% of maximum pressure for 5-minute cycles (enhanced structural strength)

3. Efficiency & Energy Saving

• Volumetric Efficiency: ≥97.5% (tested at 16 MPa, 1800 rpm)
• Total Efficiency: ≥89% (15% energy savings compared to conventional large-displacement pumps)
• Variable Displacement Mechanism: Adaptive swashplate design eliminates throttling losses by delivering oil on demand, reducing power consumption in partial-load operations.

4. Noise & Temperature Control

• Noise Level: ≤61.5 dB(A) (at 1800 rpm, 28 MPa) – industry-leading for high-displacement pumps
• Heat Generation: Oil temperature rise ≤38℃ under continuous operation (22% lower than standard large pumps), minimizing cooling system burden

Control Modes & Adaptability

1. Control Options

• Pressure Compensation Control (Type 01): External pilot pressure signal (0.3～3.5 MPa) enables stepless pressure adjustment with response time ≤0.5 seconds
• Electromagnetic Dual-Pressure Control (Type 02): DC24V signal-driven high-low pressure switching (PL/PH) for automated heavy machinery
• Electro-Hydraulic Proportional Control: Closed-loop pressure/flow regulation with ±0.3 MPa precision, ideal for large-scale automated production lines
• Standard Model Configuration: A145-L-R-01-B-S-60 / A145-L-R-01-C-S-60 (base mounting, side port, flat key shaft extension)

2. Installation Flexibility

• Mounting Type: Base (L) installation (standard) with optional flange (F) adaptation
• Port Position: Side (S) interface as standard (axial port available on request)
• Shaft Extension: Flat key (K) design for stable power transmission in high-torque applications
• Dimensions: Optimized footprint for integration into large machinery (compatible with A Series mounting standards)

Application Fields

The A145 excels in heavy-duty industrial scenarios requiring high flow and pressure:

• Large-Scale Injection Molding Machines: Powers mold clamping and injection for extra-large plastic components (e.g., automotive bumpers, industrial containers) with minimal pressure fluctuation
• Heavy Hydraulic Presses: Delivers stable 28 MPa pressure for thick plate stamping, forging, and metal forming processes
• Metallurgical Machinery: High-temperature resistant design (0～60℃ oil temperature range) adapts to steel mill rolling mills and smelting equipment
• Marine Engineering: Shock-resistant radial structure withstands vessel vibration and harsh marine environments
• Port Machinery: Drives container cranes, ship unloaders, and heavy lifting equipment with reliable high-flow output

Reliability & Maintenance

1. Durability Features

• Core Components: Reinforced plunger-cylinder assembly with minimal clearance, enhancing wear resistance by 30% and ensuring service life exceeding 20,000 hours
• Sealing System: Fluororubber seals (operating temperature: -20～80℃) with leakage rate ≤0.5 mL/min
• Structural Reinforcement: Thickened pump housing and reinforced swashplate mechanism for high-torque and high-pressure endurance

2. Maintenance Requirements

• Hydraulic Oil: ISO VG46 anti-wear hydraulic oil (NAS Class 9 or higher), replacement every 2000 hours
• Filter Maintenance: Independent ≤5μm filtration circuit for control oil path, cleaning required every 400 hours
• Routine Inspection: Aligns with 特种设备维护保养规范 (Special Equipment Maintenance Standards) – includes pressure calibration, seal inspection, and lubrication checks

Key Advantages

• Industry-leading displacement (145 cm³/rev) delivers massive flow for heavy-duty applications
• 28 MPa sustained pressure with exceptional stability for critical forming processes
• Energy-efficient variable design reduces operational costs in high-consumption systems
• Robust construction tailored for harsh industrial environments and continuous operation
• Flexible control and installation options enable seamless integration into large machinery
• Low noise and heat generation ensure operator comfort and system longevity