Pressure compensator
Catalogue-listed control for maintaining preset pressure as output flow reduces near full cut-off.
Yuken high-pressure piston pumps
A3H Series variable displacement piston pumps
Catalogue-backed specifications for Yuken A3H16 to A3H180 high-pressure pumps, with model identification and quotation support.
7 sizesA3H16, A3H37, A3H56, A3H71, A3H100, A3H145 and A3H180
16.3-180.7cm³/rev. geometric displacement range
280 kgf/cm²rated pressure for pressure-compensator models
350 kgf/cm²intermittent pressure, subject to operating restrictions
Product overview
High pressure across a wide delivery range
The Yuken A3H Series covers seven high-pressure variable displacement piston-pump sizes. The supplied catalogue lists models from 16.3 to 180.7 cm³/rev. and describes a compact design with a broad delivery range.
The catalogue identifies pressure-compensator, constant-power and load-sensing control families. Detailed availability and suitability must be confirmed for the selected model and application.
Pressure-compensator specifications
A3H16 to A3H180 comparison
| Model | Geometric displacement | Minimum adjustable flow | Maximum shaft speed | Approx. flange-mount mass |
|---|---|---|---|---|
| A3H16 | 16.3 cm³/rev. | 8.0 cm³/rev. | 3600 r/min. | 14.5 kg |
| A3H37 | 37.1 cm³/rev. | 16.0 cm³/rev. | 2700 r/min. | 19.5 kg |
| A3H56 | 56.3 cm³/rev. | 35.0 cm³/rev. | 2500 r/min. | 25.7 kg |
| A3H71 | 70.7 cm³/rev. | 45.0 cm³/rev. | 2300 r/min. | 35.0 kg |
| A3H100 | 100.5 cm³/rev. | 63.0 cm³/rev. | 2100 r/min. | 44.6 kg |
| A3H145 | 145.2 cm³/rev. | 95.0 cm³/rev. | 1800 r/min. | 60.0 kg |
| A3H180 | 180.7 cm³/rev. | 125.0 cm³/rev. | 1800 r/min. | 70.4 kg |
All models in this pressure-compensator table list a minimum shaft speed of 600 r/min., rated pressure of 280 kgf/cm² and intermittent pressure of 350 kgf/cm². Operation above rated pressure is restricted. Confirm conditions with current Yuken information.
Constant power
The catalogue identifies a constant-power control family for the A3H Series.
Load sensing
The catalogue identifies a load-sensing control family for the A3H Series.
Selection information
Details to confirm before quotation
Send the full model code or a clear nameplate photograph. Model size, control type, mounting and shaft configuration must be identified before quotation.
- A3H model size and complete designation
- Pressure compensator, constant-power or load-sensing control
- Flange or foot mounting
- Direction of rotation
- Keyed or requested spline shaft extension
- Quantity, hydraulic fluid and operating conditions
Download the A3H Series catalogue
Review the manufacturer document for model coding, controls, performance characteristics, dimensions and installation guidance.
Send your A3H Series requirement
Include the complete model, control type, quantity and application details.