YUKEN A Series 28MPa Piston Pump

Overview

The A Series 28MPa YUKEN Variable Piston Pump is a high-performance hydraulic component engineered for demanding industrial applications. As a flagship product of YUKEN, a global leader in hydraulic technology, this series integrates advanced variable control mechanisms, exceptional pressure resistance, and energy-efficient design to deliver reliable and precise fluid power solutions across diverse sectors.

Core Technical Specifications

1. Displacement Range

The series offers multiple displacement options to match varying load requirements:

• A56: 56.2 cm³/rev (for medium to large hydraulic systems)
• A70: 70.0 cm³/rev (versatile for high-pressure applications)
• A90: 91.0 cm³/rev (ideal for heavy-duty machinery)
• A145: 145 cm³/rev (designed for ultra-high pressure scenarios)

2. Pressure & Speed Performance

• Maximum Pressure: 28 MPa (suitable for high-pressure forming, casting, and machining processes)
• Adjustable Pressure Range: 1.2～28 MPa (stepless regulation to adapt to different operational demands)
• Rated Speed: 1800 rpm
• Wide Speed Range: 600～3600 rpm (supports rapid actuation and low-speed pressure holding operations)

3. Efficiency & Energy Saving

• Volumetric Efficiency: ≥98% (tested at 16 MPa, 1800 rpm)
• Total Efficiency: ≥90% (achieves 15%～20% comprehensive energy savings compared to conventional pumps)
• Variable Displacement Control: Adjusts swashplate angle to realize “on-demand oil supply”, eliminating throttling losses and reducing energy consumption.

4. Noise & Temperature Control

• Low Noise Level: ≤56.8 dB(A) for A16 model, ≤61.5 dB(A) for A145 model (exceeds industry standards)
• Reduced Heat Generation: Oil temperature rise rate is 22% lower than ordinary pumps, minimizing cooling system load and extending hydraulic oil lifespan.

Control Modes & Adaptability

1. Control Options

• Pressure Compensation Control (Type 01): Achieves stepless pressure adjustment via external pilot pressure signal (0.3～3.5 MPa) with response time ≤0.5 seconds.
• Electromagnetic Dual-Pressure Control (Type 02): Supports high-low pressure switching (PL/PH) via DC24V electric signal, perfect for automated production lines.
• Electro-Hydraulic Proportional Control: Integrates proportional valves for closed-loop pressure/flow control with precision ±0.3 MPa.

2. Installation Flexibility

• Mounting Types: Flange (F) or base (L) installation to fit different mechanical structures.
• Port Positions: Axial (unmarked) or side (S) interfaces for convenient pipeline layout.
• Shaft Extension: Flat key (K) design ensures stable power transmission.

Application Fields

The A Series 28MPa pump excels in various industrial scenarios:

• Die Casting Machinery: Delivers stable 16～28 MPa pressure for complete metal liquid filling, reducing shrinkage defects; supports high-speed injection cycles (multiple injections per minute).
• Plastic Machinery: Drives mold clamping and injection actions in injection molding machines with minimal pressure fluctuation, ensuring high product repeatability.
• Metallurgical Machinery: High-temperature resistant design (oil temperature range: 0～60℃) adapts to smelting and rolling processes.
• Marine Machinery: Shock-resistant radial structure withstands ship 颠簸 and vibration.

Reliability & Maintenance

1. Long Service Life

• Core Components: Minimal clearance between plungers and cylinders enhances wear resistance by 30%, ensuring service life exceeding 20,000 hours.
• Sealing System: Fluororubber seals adapt to -20～80℃ wide temperature range with leakage rate ≤0.5 mL/min.

2. Easy Maintenance

• Oil Cleanliness Requirement: NAS Class 9 or higher; recommended ISO VG46 anti-wear hydraulic oil (replacement every 2000 hours).
• Filter Maintenance: Independent filtration circuit (≤5μm filter) for external control oil path, requiring cleaning every 400 hours.

Key Advantages

• High pressure stability and precise flow control for critical manufacturing processes.
• Energy-efficient design reduces operational costs and environmental impact.
• Robust construction ensures durability in harsh industrial environments.
• Flexible control options and installation configurations for seamless system integration.
• Low noise and heat generation improve workplace comfort and system reliability.