Technical parameters of YUKEN variable piston pump

As Japan’s leading manufacturer of hydraulic components, YUKEN’s variable piston pumps are widely used in industrial hydraulic systems and are known for their high efficiency, high pressure and reliable control.The following are the core technical parameters based on the integration of authoritative technical documents and market commodity information：

Core performance parameters
Parameter category, typical range, representative model description
The rated pressure is 28-40 MPa. The rated pressure of conventional models of A70-FR01BS-60 and A3H series is 35 MPa, and some high-pressure models (such as A3H180) can reach 70 MPa.
Peak pressure 35-40 MPa A3H180-FR09-55A4K-10 can withstand excessive pressure for a short time, suitable for impact load conditions
Displacement range 10-180 cm3/rev A10 series, A3H180 A10 series displacement 10-140 cm3/rev, A3H series up to 180 cm3/rev
The maximum speed is 1000-1450 RPM. The typical operating speed of A70-FR01BS-60 is 1450 RPM, and some models allow up to 3000 RPM.
Volumetric efficiency ≥95% A3H, AR series still maintains excellent volumetric efficiency under high pressure conditions, and leakage is extremely low
The total efficiency is ≥90%. The A70 and A10 series have excellent mechanical and volumetric efficiency under rated operating conditions.
Working medium hydraulic oil All models are recommended to use ISO VG32 or VG46 grade petroleum-based hydraulic oil
Operating temperature 0-60°C, all models, temperature out of range will affect sealing performance and viscosity stability
The recommended viscosity is 20-400 mm2/s. All models have a viscosity that is too low to cause increased leakage, and too high to increase energy consumption.

Comparison of typical model parameters
Model displacement (cm3/rev) Rated pressure (MPa) Speed (RPM) weight (kg) Pump shaft position control method Source basis
A70-FR01BS-60 70 28 1450 58.5 Side vertical pressure compensation [Product 5]
A3H180-FR09-55A4K-10 180 70 — — Horizontal pressure compensation [Product 7]
AR16-FR01B-22 15.8 21 1800 — Flange type pressure compensation [search 13]
A10-FR01B-12 10 28 1000 55 Front pump pressure compensation [Product 1]
A145-L-F-R-01-B-S-60 145 35 — 66 Side vertical pressure compensation [Product 4]
Note: Some models do not mark the speed, because the actual operating speed is determined by the system load and control strategy.

Analysis of model naming rules
YUKEN variable piston pump model adopts standardized coding, taking A70-FR01BS-60 as an example：
A70: A series variable piston pump, displacement 70 cm3/rev
F: Flange installation (F=Flange)
R: Rotate clockwise (standard direction)
01: The control method is electro-hydraulic proportional load sensitive control
BS: Pressure Compensated type (Pressure Compensated)
60: Design version number

Other common suffixes：
L: Vertical installation
K: With pilot control
S: Side interface
H: High pressure type
Structure and control characteristics
Working principle: Adjust the stroke of the plunger through the angle of the swash plate or oblique axis to achieve stepless changes in displacement, and automatically adjust the output flow rate with the pressure compensation valve to match the system requirements.
Control method: The mainstream is Pressure compensated, and some high-end models support Load sensing or constant power control.
Sealing technology: High-wear-resistant ceramic-steel pairing pairs and polyurethane seals are used to ensure long-term operation under high pressure without leakage.
Protection level: The standard design meets the needs of dust and oil mist protection in the industrial environment.

Application area
Injection molding machine
Metalworking machine tools (CNC)
Hydraulic elevator and lifting platform
Steel mill rolling mill
Maritime engineering and die casting equipment
Construction machinery (excavators, loaders)
Rich media components