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yuken variable piston pump

更新时间：2026-04-11 18:14:15

Yuken variable piston pumps are high-performance axial piston pumps designed for precision hydraulic systems requiring adjustable flow rates and pressure control. These swashplate-type pumps utilize a variable displacement mechanism to optimize energy efficiency and system performance across diverse industrial applications.

Core Product Series

Series	Pressure Rating	Displacement Range	Key Features
A Series	Up to 28 MPa (4,060 psi)	10–219 cm³/rev (.610–13.36 [cu.in](cu.in)./rev)	Standard efficiency, low noise, 10+ control options
A3H Series	Up to 35 MPa (5,080 psi)	16.3–180.7 cm³/rev	High pressure, compact, high power-to-mass ratio
A3HG Series	Up to 35 MPa	16.3–180.7 cm³/rev	A3H-based with thru-drive capability, ISO/SAE compliant
AR Series	Up to 28 MPa	6.2–180.7 cm³/rev	Lightweight, reduced noise, compact design
A7H Series	Up to 40 MPa (5,800 psi)	180–270 cm³/rev	Ultra-high pressure for heavy-duty applications

Working Principle

Yuken variable piston pumps operate on the swashplate principle:

A rotating cylinder block contains multiple pistons that reciprocate as the swashplate angle changes
Displacement adjustment: Tilting the swashplate alters piston stroke length, controlling output flow rate
Zero displacement: When the swashplate is perpendicular to the drive shaft, no fluid is displaced
Flow direction: Some models allow bi-directional flow by reversing swashplate tilt

Key Performance Advantages

Energy Efficiency: High overall efficiency (>90% at 16 MPa, 1800 rpm) reduces power consumption and heat generation
Low Heat Generation: Minimal power loss enables smaller reservoir requirements
Precise Control: Ten control types available, including pressure compensator, load-sensing, and electro-hydraulic proportional control
High Volumetric Efficiency: >95% under standard operating conditions, maintaining consistent performance
Compact Design: High power-to-mass ratio allows integration into space-constrained systems
Flexible Mounting: Flange or foot-mounted configurations for easy installation

Control Options

Yuken variable piston pumps offer comprehensive control capabilities to match specific system requirements:

Pressure Compensator (PC): Maintains constant pressure by adjusting flow
Load Sensing (LS): Adjusts flow based on system demand, maximizing energy savings
Electro-Hydraulic Proportional (EPP/EPC): Precise electronic control of pressure and flow
Remote Pressure Control (RPC): Allows pressure adjustment from a remote location
Two-Step Pressure Control: Switches between two pressure settings via solenoid valve
Flow Control with Pressure Compensation: Regulates flow while maintaining constant pressure

Typical Applications

Yuken variable piston pumps are widely used across industries requiring high-pressure, high-precision hydraulic systems:

Industrial machinery: Injection molding, metal forming presses, machine tools
Construction equipment: Excavators, loaders, hydraulic cranes
Material handling: Heavy-duty forklifts, automated guided vehicles
Marine systems: Steering, winches, and cargo handling equipment
Renewable energy: Wind turbine pitch control, solar tracking systems

Technical Specifications (General)

Parameter	Value Range
Maximum Pressure	Up to 40 MPa (5,800 psi) for A7H series
Displacement	6.2–270 cm³/rev (0.378–16.47 [cu.in](cu.in)./rev)
Speed Range	600–3600 rpm (depending on model)
Volumetric Efficiency	>95% at rated pressure and speed
Overall Efficiency	>90% at 16 MPa, 1800 rpm
Fluid Compatibility	Mineral oils, synthetic hydraulic fluids (ISO VG 32–68)

Would you like a concise comparison of Yuken’s A, A3H, and AR series to help select the right pump for your application?

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