Product Overview
The ARL1-12-FR01A-10 is an ultra-compact swash plate type axial variable displacement piston pump from YUKEN’s ARL1 Series. Engineered specifically for low-pressure, small-flow hydraulic systems, this series builds upon YUKEN’s proven A Series and AR Series piston pump technology, delivering three core advantages: ultra-compact size, lightweight construction, and ultra-low noise. The ARL1 Series offers 40% smaller volume and 30% lighter weight compared to conventional A Series pumps, making it the ideal hydraulic power choice for space-constrained equipment.
This product is a pressure-compensated variable displacement piston pump featuring an integrated pressure compensation control valve that automatically adjusts displacement according to system pressure—no external control components required. When system pressure reaches the set value, the pump automatically reduces displacement to near zero, maintaining only the make-up flow needed for pressure holding, delivering significant energy savings with no throttling or overflow losses.
Key Interchangeability Advantage: Our ARL1 Series piston pumps are manufactured to strict YUKEN original design specifications, ensuring 100% direct interchangeability with original units. All mounting interfaces, flange dimensions, shaft configurations, and port positions are identical to the original product—no modifications required. Every pump undergoes 100% factory performance testing under simulated operating conditions (covering rated pressure, peak pressure, and full speed range performance curves), guaranteeing plug-and-play reliability with zero performance deviation.
Model Code Breakdown (based on YUKEN ARL1 Series designation rules):
ARL1 = Series: Low-pressure compact swash plate variable piston pump
12 = Nominal displacement: 12.3 cm³/rev
F = Mounting type: Flange mounting (ISO standard)
R = Rotation: Clockwise (viewed from shaft end)
01 = Control type: Pressure-compensated (constant pressure variable)
A = Inlet port direction: Downward (S = side)
10 = Design code: Standard design
Technical Specifications
ARL1-12-FR01A-10
Product Series: ARL1 Series Ultra-Compact Swash Plate Axial Variable Piston Pump
Pump Type: Pressure-Compensated Variable Displacement Piston Pump
Nominal Geometric Displacement: 12.3 cm³/rev (12.3 mL/r)
Minimum Variable Displacement: Approx. 4.0 cm³/rev
Rated Operating Pressure: 5 MPa
Maximum Operating Pressure: 7 MPa (low-pressure series, do not exceed)
Rated Speed: 1500 rpm (recommended)
Maximum Speed: 1800 rpm (short-term peak)
Minimum Speed: 600 rpm (to prevent cavitation)
Theoretical Flow (at 1500 rpm): 18.45 L/min
Volumetric Efficiency: ≥ 94%
Overall Efficiency: ≥ 84%
Noise Level (7 MPa / 1500 rpm / 1m): ≤ 55 dB(A) (ultra-quiet)
Control Type: Pressure-compensated (constant pressure variable, no manual flow adjustment)
Body Material: High-strength cast iron
Mounting Type: Flange mounting (Type F)
Direction of Rotation: Clockwise (R, viewed from shaft end)
Inlet Port Direction: Downward (A)
Recommended Fluid: Petroleum-based mineral hydraulic oil ISO VG 32/46
Recommended Viscosity Range: 20 – 400 mm²/s
Operating Temperature Range: 0 – 60℃ (recommended 20 – 50℃)
Filtration Requirement: NAS Class 10 or better
Inlet Pressure: -0.0167 ～ +0.05 MPa
Case Drain Pressure: ≤ 0.1 MPa (steady state), ≤ 0.5 MPa (peak)
Weight: Approx. 6.8 kg (flange mounting type)
Key Technical Advantages
1. Pressure-Compensated Variable Control for Energy Efficiency
The integrated pressure compensation control valve automatically reduces the swash plate angle when system pressure reaches the set point, decreasing displacement to near zero. The system maintains only the minimal make-up flow required for pressure holding, delivering no throttling or overflow losses and significantly reducing energy consumption and oil temperature rise. Energy savings are particularly pronounced compared to fixed-displacement pump systems.
2. Ultra-Compact Lightweight Design Saves Installation Space
The ARL1 Series offers 40% smaller volume and 30% lighter weight compared to conventional A Series pumps. The flange-mounted version weighs only approximately 6.8 kg. The ultra-compact dimensions and lightweight design make it the ideal choice for space-constrained equipment and mobile applications.
3. Ultra-Low Noise Operation for Indoor and Quiet Environments
At 7 MPa pressure, 1500 rpm speed, and 1 meter distance, the full cut-off noise level is only 55 dB(A) . This noise level is significantly lower than comparable products, making it particularly suitable for office environments, medical equipment, laboratories, and other applications with strict noise requirements.
4. High Reliability and Long Service Life
The ARL1 Series inherits decades of proven technology and reliability experience from YUKEN’s A Series and AR Series piston pumps. Optimized valve plate and swash plate design, combined with high-strength cast iron construction, ensure stable performance during long-term continuous operation. Volumetric efficiency ≥ 94% with strong contamination resistance and low maintenance costs.
5. Flexible Mounting and Configuration Options
Available in flange mounting (Type F) and foot mounting (Type L) . Inlet port direction options include axial (A) and side (S) . Displacement options cover 6.2 / 8.2 / 12.3 / 16.3 cm³/rev, allowing precise matching to system flow requirements.
Application Areas
Office & Commercial Equipment: Hydraulic lift desks, office chairs, commercial coffee machines, vending machines—where quiet operation and energy efficiency are critical
Light Industry & Packaging Machinery: Small filling machines, labeling machines, sealing machines—low-pressure small-flow, frequent start-stop operation
Automation & Fixtures: Machine tool workholding fixtures, pneumatic-hydraulic conversion stations, small positioning cylinders—stable pressure holding, fast response
Medical & Laboratory Equipment: Medical beds, rehabilitation equipment, laboratory hydraulic test stands—high cleanliness and low noise requirements
Small Construction Machinery: Garden machinery, small lift platforms, micro excavators—lightweight and energy-efficient
Machine Tools & Automation Equipment: Hydraulic chucks, tailstocks, tool magazine drives—positioning accuracy up to 0.01mm
Food Filling Machinery: Hydraulic drives for food packaging and filling equipment
Material Fatigue Testing Machines: Hydraulic power source for laboratory material testing equipment
Expert Maintenance Tips
1. Pre-Installation Checks
Verify pump rotation direction is clockwise (R) (viewed from shaft end) matches system drive direction.
Check mounting type (flange mounting Type F) to ensure interface dimensions match.
Use flexible coupling with maximum misalignment TIR < 0.1mm and angular error < 0.2°.
2. First Start-Up & Oil Priming
Prime the pump housing with clean hydraulic oil before first start-up; ensure suction line is fully filled—never run dry.
Recommended fluid: petroleum-based mineral hydraulic oil ISO VG 32 or 46.
Maintain operating oil temperature within 0 – 60℃ (recommended 20 – 50℃).
3. Filtration & Fluid Cleanliness
Maintain fluid cleanliness at NAS Class 10 or better.
Variable piston pumps are sensitive to fluid contamination—regularly monitor oil quality to prevent contaminants from accelerating piston and cylinder wear.
4. Pressure Setting & Adjustment
The ARL1-12-FR01A-10 is pressure-compensated type with no manual flow adjustment mechanism. System pressure is set via the pressure compensation valve—do not arbitrarily adjust factory presets.
Maximum operating pressure must not exceed 7 MPa—over-pressurization will cause internal component damage.
5. Operating Monitoring
If abnormal noise or pressure fluctuation occurs, first check suction lines for leakage or blockage.
Regularly check torque on pump and piping connection bolts to prevent loosening from vibration.
Maintain inlet pressure within -0.0167 ～ +0.05 MPa to ensure adequate oil supply.
