A3H71 Series High pressure variable piston pump

YUKEN A3H series hydraulic pumps are high-pressure variable piston pumps developed by YUKEN Company. They have a variety of specifications and models. The following are introduced from four aspects: basic model, suffix combination, complete model example, and control type.：
 Basic model
The basic models of YUKEN A3H series hydraulic pumps are named according to the displacement size. Common models include：
A3H16, A3H37, A3H56, A3H71, A3H100, A3H145, A3H180

YUKEN A3H71 series high-pressure variable piston pump, as the key model in the A3H series of Youyan Company, has the following specifications and characteristics：
1. Core specifications
Displacement
Geometric displacement: 70.7 cm3/rev (A3H71-FR01KK-10 model), which is a medium and large displacement pump, suitable for scenarios where higher flow is required.
Minimum adjustable flow rate: 45.0 cm3/rev, which supports fine adjustment of flow rate and adapts to the needs of different working conditions.
Pressure performance
Rated working pressure: 28 MPa, which meets the needs of conventional high-pressure hydraulic systems.
Maximum working pressure: 35 MPa, providing stable high-voltage output, suitable for heavy-duty or high-pressure environments.
Speed range
Maximum speed: 2300 r/min, supports high-speed operation and improves system response speed.
Minimum speed: 600 r/min, suitable for low-speed and stable operation scenarios.
Efficiency and performance
Volumetric efficiency: Maintain high volumetric efficiency in a high-pressure environment to reduce energy loss.
Total efficiency: high-efficiency and energy-saving design to reduce long-term operating costs.

2. Structure and design characteristics
Installation method
Flange-mounted type (such as A3H71-FR01KK-10), which is easy to integrate with other components of the hydraulic system.
Pump shaft position: vertical installation, optimized space layout, easy maintenance.
Interface size
Discharge caliber: 26 mm, suction caliber: 36 mm, matching different flow and pressure requirements.
Impeller design
Number of impellers: 10, improve flow and pressure stability, and ensure stable output.
Material and durability
Pump body material: cast iron or high-strength alloy, corrosion-resistant, wear-resistant, and long service life.
Sealing form: Advanced sealing technology (such as KK identification model) is used to prevent leakage.

3. the application field
YUKEN A3H71 series pumps are widely used in the following fields：
Industrial machinery: injection molding machines, die-casting machines, machine tools, etc.
Construction machinery: excavators, cranes, concrete pump trucks, etc.
Metallurgical machinery: continuous casters, rolling mills, etc.
Marine and offshore engineering: hydraulic steering gear, deck machinery, etc.
Heavy industry: hydraulic systems in petroleum, chemical, steel and other industries.

4. Examples of typical models
A3H71-FR01KK-10‌：
Flange installation, vertical pump shaft, 10 impellers, displacement 70.7 cm3/rev, maximum pressure 35 MPa.
A3H71-FR55KK-10‌：
Similar parameters, but the control type or configuration may be different, please refer to the specific manual.
A3H71-LR01KK-10‌：
Side vertical installation, other parameters are similar to the FR type, which adapts to different installation needs.