Yuken A Series Variable Displacement Hydraulic Piston Pump

■ Specifications

■ Specifications and Design numbers for Special Fluids

Ordering code for standard program：

As a premier manufacturer and supplier of advanced industrial fluid power solutions, we introduce the A Series Variable Displacement Hydraulic Piston Pump. Engineered for heavy-duty machinery, this pressure compensator pump delivers exceptional control and reliability for volume procurement needs.

• Displacement Range: 10.0 to 145 cm³/rev

• Operating Pressure: Up to 28 MPa

• Efficiency: High volumetric efficiency with sharp cut-off characteristics

• Acoustics: Ultra-low noise operation for safer working environments

Performance & Efficiency

At the core of this pump's exceptional performance is its meticulously balanced swash plate design. This internal architecture allows the pump to achieve a staggering volumetric efficiency of over 98%, ensuring that almost every drop of fluid is translated into usable mechanical power. For facilities focused on long-term cost reduction, this translates to immediate savings.

• Optimized Swash Plate: Delivers rapid response times to system pressure changes, ensuring smooth and uninterrupted power delivery.

• Sharp Cut-Off Mechanism: Instantly reduces flow when the target pressure is reached, preventing energy waste and mechanical strain.

• Reduced Power Consumption: The low internal friction and optimized fluid pathways mean the prime mover (electric motor or engine) expends less energy, lowering electricity or fuel bills.

Noise & Heat Control

Industrial environments are often plagued by excessive noise and heat, which degrade equipment and create hazardous working conditions. This pump directly addresses these issues through its advanced internal geometry. By minimizing fluid turbulence and mechanical vibration, it operates with a smooth, quiet hum that sets a new industry standard.

• Acoustic Dampening: Specifically designed to eliminate the high-frequency whining typical of piston pumps, achieving levels as low as 57.3 dB(A).

• Thermal Stability: The high-efficiency operation inherently produces less friction, which means the hydraulic fluid absorbs significantly less heat.

• Space-Saving Benefits: Because the oil remains cooler, engineers can safely design systems with smaller hydraulic reservoirs, freeing up valuable floor space and reducing the volume of expensive hydraulic fluid required.

Operating Specifications

Versatility is a hallmark of the A Series. Whether you are designing a compact power unit or a massive centralized hydraulic system, there is a specific model tailored to your exact requirements. The broad spectrum of operating parameters ensures that system designers never have to compromise on power or speed.

• Broad Displacement Range: From the compact 10.0 cm³/rev A10 model to the massive 145 cm³/rev A145 model, covering all flow requirements.

• High-Pressure Capabilities: Rated operating pressures ranging from 16 MPa up to a robust 28 MPa, providing the brute force needed for heavy industrial pressing and lifting.

• Flexible Speed Range: Capable of operating efficiently at low speeds of 600 r/min up to high-velocity applications at 1800 r/min.

Fluid Adaptability & Control Options

Modern industrial applications often require specialized fluids for safety and environmental compliance. This pump is engineered with highly adaptable seals and internal metallurgy to handle a wide variety of hydraulic media without degrading performance or lifespan.

• Standard and Special Fluids: Fully compatible with standard anti-wear hydraulic oils, as well as fire-resistant fluids like Water-Glycols, Phosphate Esters, and Polyol Esters.

• Precision Control: Features a highly responsive pressure compensator type control, ensuring precise flow adjustment based on real-time load demands.

• Customizable Configurations: Available with side port positioning and keyed shaft extensions to seamlessly integrate into complex hydraulic manifolds and drive systems.

Material & Durability

Downtime is the enemy of profitability. That is why the A Series is constructed from the highest grade materials available. The heavy, solid feel of the cast iron housing is a testament to its ability to absorb shock loads and resist the physical wear of continuous, high-pressure operation.

• High-Strength Cast Iron: The main body is cast from premium iron, providing exceptional rigidity and preventing casing deflection under extreme pressure spikes.

• Wear-Resistant Internals: The pistons and cylinder blocks are treated with advanced metallurgical processes to resist abrasion, even in less-than-ideal fluid conditions.

• High Power-to-Weight Ratio: Despite its rugged construction, the pump maintains a compact footprint, offering immense power density for mobile and stationary applications alike.

Application Scenarios

The robust design and precise control of the A Series make it the hydraulic heart of choice for demanding industrial sectors. Its ability to maintain consistent pressure while adapting to variable flow requirements makes it indispensable in heavy machinery.

• Injection Molding & Die-Casting: Provides the exact pressure holding and rapid flow required for high-quality plastic and metal part manufacturing.

• Metallurgy & Steel Mills: Withstands the harsh, high-temperature environments of metal forming and rolling equipment.

• Construction & Mining Machinery: Delivers reliable power for excavators, loaders, and drilling rigs operating in unforgiving conditions.

• Marine Engineering: Offers the durability and fluid adaptability required for shipboard hydraulic systems and deck machinery.

After-Sales & Customization

We understand that industrial sourcing requires more than just a product; it requires a reliable partnership. We stand behind the quality of our hydraulic pumps with comprehensive support and flexible manufacturing capabilities designed to meet the exact needs of equipment builders.

• Comprehensive Warranty: Every pump is backed by a solid 1-year warranty, ensuring peace of mind and guaranteed performance out of the box.

• Technical Support: We provide expert video technical guidance and troubleshooting to assist your engineering and maintenance teams.

• OEM & ODM Capabilities: We offer extensive customization, including specific flange or foot mountings, clockwise or anti-clockwise rotations, and specialized shaft designs to fit your proprietary equipment.

Why Choose Us

Selecting the right supplier for critical hydraulic components is vital for the success of your manufacturing operations. We combine decades of engineering expertise with state-of-the-art production facilities to deliver products that consistently exceed industry standards.

• Decades of Manufacturing Excellence: With over 10 years of dedicated experience and our own advanced factory, we maintain absolute control over product quality.

• Strict Quality Inspection: Every single pump undergoes rigorous pressure, flow, and acoustic testing before it is approved for shipment, ensuring zero defects.

• Global Logistics & Fast Delivery: We have optimized our supply chain to provide rapid response times and fast, secure delivery to industrial hubs worldwide.

• 24/7 Dedicated Service: Our professional engineering and sales teams are available around the clock to provide rapid quotes, technical data, and custom solutions.

FAQ

To assist your engineering and procurement teams, we have compiled answers to the most frequent technical inquiries regarding the A Series Variable Displacement Hydraulic Piston Pump.

• Q: What is the standard lead time for volume procurement orders?
  A: Thanks to our streamlined manufacturing process and extensive inventory of core components, standard configuration orders are typically processed and dispatched swiftly. For large-scale customized OEM orders, our sales managers will provide a precise, optimized production schedule to meet your assembly deadlines.

• Q: Can this pump be easily retrofitted into existing hydraulic power units?
  A: Yes. The pump is designed with standard flange and foot mounting options, as well as standard keyed shafts. This ensures seamless integration into existing hydraulic circuits without the need for extensive structural modifications.

• Q: How exactly does the pressure compensator mechanism improve energy efficiency?
  A: The pressure compensator automatically adjusts the angle of the swash plate. When the system reaches the pre-set pressure, the pump reduces its displacement to near zero, maintaining pressure without pumping excess fluid over a relief valve. This eliminates wasted energy and prevents unnecessary heat generation.

• Q: Are there specific maintenance protocols recommended when using water-glycol fluids?
  A: When utilizing fire-resistant fluids like water-glycols, we recommend adhering to the specific design numbers (e.g., 3230, 6030) which feature optimized seals and bearings. Regular monitoring of fluid viscosity and maintaining operating temperatures below 50°C will ensure maximum pump longevity.

• Q: What happens if a pump experiences a performance issue during the warranty period?
  A: All products are rigorously tested before shipping. However, if a quality issue arises within the 12-month warranty period, our after-sales team will provide immediate technical consultation. If the issue is due to manufacturing, we will promptly send replacement spare parts or arrange for repair to minimize your downtime.