A70-FR04HAS Yuken Variable Piston Pump 210Bar

Product Overview

Engineered to fulfill the exact demands for high efficiency, low noise, and continuous high-pressure performance in industrial automation and machine tool hydraulic systems, our industrial-grade A Series variable axial piston pump delivers exceptional value. Covering core configurations like A70-FR04HAS-A-60366 and A90-FR04HAS-A-60366, this series utilizes a high-stability swashplate design tailored for open circuits, acting as a 100% drop-in replacement for original Yuken equivalents. As a specialized manufacturer of high-pressure hydraulic components, we strictly manage every production stage from raw material selection to precision grinding. Every single unit undergoes 100% simulated working condition load testing prior to dispatch, guaranteeing superior volumetric efficiency, precise pressure compensation response, and ultra-low noise levels at a continuous 210-bar operating pressure.

Technical Specifications

• Complete Model Codes: A70-FR04HAS-A-60366, A90-FR04HAS-A-60366

• Pump Type: Axial Piston Variable Pump, Swashplate Design (Open Circuit)

• Rated Displacement: 70.0 cc/rev (A70 size) / 90.0 cc/rev (A90 size)

• Rated Operating Pressure: 210 bar (21 MPa / 3050 psi)

• Peak Operating Pressure: 250 bar (25 MPa / 3625 psi)

• Pressure Adjustment Range: 15 bar to 210 bar (04 pressure control code)

• Maximum Speed: 1800 rpm

• Control Method: HAS (Pressure Compensator Control with module)

• Rotation: Right-hand (R, Clockwise, viewed from drive shaft)

• Weight: Approx. 37.5 kg (A70) / 48.5 kg (A90)

Key Technical Advantages

• 100% Drop-in Interchangeability: Manufactured with precise reverse engineering to match original factory specifications. Mounting flanges, drive shaft dimensions, and port positions are identical to Yuken A70/A90 series, enabling direct, modification-free field replacements.

• Ultra-Low Noise & Low Pressure Pulsation: Featuring optimized valve plate damping notch geometry and a high-rigidity cast iron housing, fluid pressure pulsations during high-pressure transitions are greatly minimized, keeping operating noise levels exceptionally low under full loads.

• Energy-Efficient HAS Pressure Compensation: Integrated with a highly responsive HAS pressure compensator valve. When system pressure reaches the preset cutoff limit, the pump automatically reduces displacement to the minimum required to maintain pressure, drastically lowering power loss and heat generation.

• 100% Simulated Working Condition Testing: Zero tolerance for batch sampling. Every assembled pump is subjected to rigorous full-load pressure pulses, compensator cutoff calibrations, and thermal equilibrium validations on automated test rigs to ensure performance that equals or surpasses OEM standards.

Application Areas

Specifically designed for open-loop hydraulic power units in stationary industrial applications. It is widely utilized in plastic injection molding machines, hydraulic presses, metal balers, high-precision CNC machine tool hydraulic stations, and automated manufacturing lines.

Expert Maintenance Tips

• Mandatory Pre-filling & Air Bleeding: Prior to initial startup, fill the pump casing completely with clean hydraulic oil through the highest case drain port to expel all trapped air. Never dry-run the pump, as a lack of immediate lubrication will instantly destroy the slipper pads and valve plate.

• Strict Case Drain Line Backpressure Limit: The case drain line must be routed independently back to the reservoir (terminating below fluid level). Ensure internal casing pressure remains strictly below 1 bar (absolute) under all operating conditions to safeguard the shaft seal.

• Rigorous Fluid Cleanliness Maintenance: The precision spools inside the HAS compensator valve are highly sensitive to particulate contamination. Maintain fluid cleanliness at ISO 4406 level 19/17/14 or better, and adhere to a strict replacement schedule for system filters.