yuken piston pump a70,a90,a145
Yuken A70/A90/A145 Axial Variable Displacement Piston Pump
Core Overview: All three models are swash plate type variable displacement piston pumps, belonging to Yuken’s A-series large-displacement models with a rated pressure of 25MPa / maximum 28MPa. They are suitable for heavy-duty hydraulic systems, featuring high efficiency and low noise as well as multiple control methods, and are widely used in injection molding machines, die-casting machines, hydraulic presses, construction machinery, etc.
I. Comparison of Basic Specification Parameters
|
Parameters
|
A70
|
A90
|
A145
|
Remarks
|
|
Geometric Displacement
|
70.0 cm³/rev
|
91.0 cm³/rev
|
145.0 cm³/rev
|
Determines the maximum output flow
|
|
Displacement Adjustment Range
|
36~70 cm³/rev
|
56~91 cm³/rev
|
83~145 cm³/rev
|
Minimum adjustment flow is the lower limit for efficient operation
|
|
Rated Pressure
|
25 MPa (3630 PSI)
|
25 MPa (3630 PSI)
|
25 MPa (3630 PSI)
|
Long-term stable working pressure
|
|
Maximum Pressure
|
28 MPa (4060 PSI)
|
28 MPa (4060 PSI)
|
28 MPa (4060 PSI)
|
Short-term peak pressure
|
|
Speed Range
|
600~1800 r/min
|
600~1800 r/min
|
600~1800 r/min
|
Efficiency may be affected below 600 r/min
|
|
Maximum Flow (1800r/min)
|
126 L/min
|
163 L/min
|
261 L/min
|
50Hz working condition, about 83% at 60Hz
|
|
Weight (Flange Mounting)
|
64 kg
|
76.5 kg
|
96.4 kg
|
Base-mounted type is slightly heavier (+12~25kg)
|
|
Initial Oil Injection Volume
|
2100 cm³
|
2500 cm³
|
3300 cm³
|
Must be filled with oil before startup to prevent cavitation
|
II. Core Features
-
Efficient and Low-Noise Design
-
The swash plate structure achieves volumetric efficiency > 98% and total efficiency > 90% (16MPa/1800r/min)
-
Optimized valve plate and piston pair reduce noise and vibration
-
Low power loss, slow oil temperature rise, and reduced oil tank capacity
-
Multiple Control Methods Available (distinguished by the “control type” position in the model)
-
Structural Features
-
Flange Mounting (F) or Base Mounting (L) available
-
Clockwise rotation (R) as standard, counterclockwise rotation customizable
-
Side Interface (S) or Axial Interface to adapt to different pipeline layouts
-
Flat Key Shaft End (K) for easy motor connection
III. Model Naming Rules (Special for A70/A90/A145)
Example: A70-F-R-02-S-A100-70
|
Field
|
Meaning
|
Optional Values
|
|
A70/A90/A145
|
Series Number (Displacement Identification)
|
A70/A90/A145
|
|
F/L
|
Mounting Method
|
F = Flange, L = Base
|
|
R
|
Rotation Direction
|
R = Clockwise (Standard), L = Counterclockwise (Customizable)
|
|
02
|
Control Type
|
01/02/03/04/09/00
|
|
S
|
Interface Position
|
S = Side, No Mark = Axial
|
|
A100
|
Solenoid Coil Type
|
A100/A200(AC), D12/D24(DC)
|
|
70/60
|
Design Number
|
A70/A90=70, A145=60
|
IV. Adjustment and Maintenance Points
-
Pressure Adjustment (Pressure increases clockwise)
-
A70/A90/A145-※R01B: Approximately 2.3MPa per revolution
-
A70/A90/A145-※R01C: Approximately 3.2MPa per revolution
-
A70/A90/A145-※R01H: Approximately 4.0MPa per revolution
-
A70/A90/A145-※R01K: Approximately 4.7MPa per revolution
-
The nut must betightened after adjustment to prevent loosening
-
Flow Adjustment (Flow decreases clockwise)
-
A70: Approximately 4.4cm³/rev per revolution, minimum adjustment flow 36cm³/rev
-
A90: Approximately 4.8cm³/rev per revolution, minimum adjustment flow 56cm³/rev
-
A145: Approximately 7.2cm³/rev per revolution, minimum adjustment flow 83cm³/rev
-
Installation and Maintenance
-
The oil filling port must face upward, and the pump must be filled with hydraulic oil before startup
-
It is recommended to install an air release valve at the discharge port to prevent cavitation and vibration
-
The first startup should be no-load operation to discharge air
-
Either drain port can be used, and the other port must be plugged
-
Working oil temperature range: 0~50°C (ventilated conditions)
V. Application Fields
-
Injection Molding Machinery: High-pressure and large-flow circuits such as mold clamping, injection, and ejection
-
Die-Casting Equipment: Mold clamping and injection systems, resistant to impact loads
-
Hydraulic Presses: Heavy-duty pressure processing equipment such as four-column hydraulic presses and bending machines
-
Construction Machinery: Large excavators, cranes, rotary drilling rigs and other mobile machinery
-
Marine and Offshore Engineering: High-pressure systems such as steering gears, windlasses, and deck machinery
-
Energy Equipment: Large hydraulic stations, test platforms, wind power equipment pitch control systems
VI. Selection Suggestions
-
According to Flow Requirements: A70 (126L/min) → Medium-sized systems, A90 (163L/min) → Medium and large-sized systems, A145 (261L/min) → Large/heavy-duty systems
-
According to Pressure Level: All three models support 25MPa rated / 28MPa peak, suitable for high-pressure working conditions
-
According to Control Requirements:
-
Simple constant pressure: Select Type 01 pressure compensation control
-
Multi-pressure switching: Select Type 02 dual pressure control
-
Precise control: Select Type 04 proportional load sensing control
-
Power limitation: Select Type 09 constant power control
-
Mounting Method: Select Flange Mounting (F) for sufficient space, and Base Mounting (L) for compact layout
Summary
Yuken A70/A90/A145 are high-performance variable displacement piston pumps, with large displacement, high pressure, high efficiency, and low noise as their core advantages. They adapt to different working conditions through multiple control methods and are the preferred solution for heavy-duty hydraulic systems. During selection, comprehensive evaluation should be conducted in combination with flow, pressure, control accuracy, and installation space to ensure stable and efficient operation of the system.
