A Series Yuken Variable Displacement Piston Pumps

1. Core Product Overview

• Design Principle: Swash plate mechanism enables stepless displacement adjustment by changing the swash plate angle, allowing the pump to deliver only the required flow for the application, minimizing energy waste
• Series Coverage: Models include A10, A16, A22, A37, A56, A70, A90, A100, A145, and A220, with geometric displacements ranging from 10 cm³/rev to 219 cm³/rev (0.610–13.36 in³/rev)
• Pressure Rating: Maximum operating pressure up to 28 MPa (4,060 psi) for standard models, with some variants capable of higher pressure operation
• Installation Flexibility: Compact design supports both flange and foot-mounted installation options for easy integration into diverse equipment layouts

2. Key Technical Specifications

3. Versatile Control Options

1. Pressure Compensator (FR Control):
   1. Automatically maintains system pressure stability
   2. Adjusts flow according to load changes, minimizing overflow losses
   3. Ideal for applications with varying load demands
2. Dual Pressure Control (02):
   1. Enables seamless switching between high and low pressure settings
   2. Perfect for systems requiring different pressure levels (e.g., injection molding machine clamping and injection cycles)
3. Load Sensing Control (LS):
   1. Adjusts pump output based on actual system demand
   2. Maximizes energy efficiency by eliminating unnecessary flow generation
4. Proportional Control (04E):
   1. Uses external electronic signals for precise flow/pressure regulation
   2. Requires separate amplifier for operation
   3. Suitable for automated systems requiring remote control
5. Electric Proportional Control with Onboard Electronics (04):
   1. Integrated electronics for simplified installation
   2. Direct interface with PLC or other control systems

4. Distinctive Advantages

• Exceptional Energy Efficiency: The variable displacement design eliminates throttling losses, reducing oil temperature rise by 22% compared to conventional pumps, allowing for smaller tank and cooling system requirements
• Superior Reliability: Robust construction with high-quality materials ensures long service life even under harsh operating conditions
• Precise Control: Fast response swash plate mechanism enables accurate flow regulation, improving system performance and product quality
• Low Noise Operation: Advanced design minimizes hydraulic noise, creating a safer and more comfortable working environment
• Easy Maintenance: Modular design facilitates straightforward inspection and repair procedures

5. Typical Application Scenarios

6. Model Nomenclature Example

• A: Series identifier
• 16: Nominal displacement (15.8 cm³/rev)
• F: Flange mounting (alternative: J for foot mounting)
• R: Clockwise rotation (looking at shaft end)
• 01: Pressure compensator control type
• C: Standard seal material
• K: Shaft type
• 32: O-ring material

7. Installation and Maintenance Tips

1. Mounting: Ensure proper alignment between pump and drive motor to avoid shaft stress
2. Fluid Requirements: Use clean hydraulic oil with recommended viscosity (ISO VG 32–68)
3. Filtration: Install a high-quality filter (10 μm or better) to protect internal components
4. Priming: Fill pump casing with oil before initial start-up to prevent dry running
5. Regular Inspection: Check for oil leaks, abnormal noise, and vibration during operation
6. Scheduled Maintenance: Follow manufacturer guidelines for oil changes and seal replacement