Pressure compensator
Available with a minimum-flow adjustment function in the catalogue model designation.
Yuken high-pressure piston pumps
A7H Series high pressure piston pumps
Catalogue-backed specifications for Yuken A7H180 and A7H265 large-displacement pumps, with control and fluid-selection guidance.
2 sizesA7H180 and A7H265 series numbers
180 / 270cm³/rev. geometric displacement
350 kgf/cm²rated operating pressure for petroleum-base oil models
400 kgf/cm²intermittent pressure, subject to operating restrictions
Product overview
Large displacement for high-pressure systems
The Yuken A7H Series adds 180 and 270 cm³/rev. high-pressure piston pumps to the high-pressure product range. The catalogue lists flange and foot mounting, pressure-compensator and constant-power controls, and optional through drive for directly mounting an auxiliary SAE-standard pump.
Petroleum-base oil models, water-glycol versions and polyol ester versions have different operating limits. The exact fluid code and complete model designation must be confirmed before ordering.
Catalogue specifications
A7H180 and A7H265 comparison
| Series number | Geometric displacement | Rated pressure | Intermittent pressure | Shaft-speed range | Approx. mass, 01 control |
|---|---|---|---|---|---|
| A7H180 | 180 cm³/rev. | 350 kgf/cm² | 400 kgf/cm² | 1800 to 1900 r/min. | 150 kg flange; 220 kg foot |
| A7H265 | 270 cm³/rev. | 350 kgf/cm² | 400 kgf/cm² | 1200 to 1600 r/min. | 220 kg flange; 310 kg foot |
The catalogue instructs users to consult Yuken for maximum-pressure operating conditions. Maximum allowable shaft speed is specified at -0.1 kgf/cm² suction pressure.
Constant power
Output flow reduces as pressure rises according to the selected constant-power code.
External pilot
The constant-power control is also listed with an external-pilot configuration.
Selection information
Details to confirm before quotation
Send the full model code or a clear nameplate photograph. Control, fluid, mounting and optional outboard-pump requirements must be identified.
- A7H180 or A7H265 series number
- Pressure-compensator or constant-power control
- Petroleum-base oil, water-glycol or polyol ester version
- Flange or foot mounting
- With or without outboard-pump mounting
- Quantity and complete operating conditions
Download the A7H Series catalogue
Review the manufacturer document for fluid-specific limits, model coding, control selection, performance characteristics, dimensions and optional through-drive arrangements.
Send your A7H Series requirement
Include the complete model, control code, fluid, quantity and application details.