1. Product Overview
• Model: A2F250L5P2
• Type: Swashplate-type axial piston variable pump
• Applications: Suitable for high-pressure, large-flow hydraulic systems in construction machinery (e.g., excavators, cranes), industrial equipment (e.g., die-casting machines, injection molding machines), and marine hydraulic systems.
2. Core Features
(1) Structure & Design
• Swashplate Design: Pistons are arranged at a fixed angle to the drive shaft, enabling stepless displacement adjustment via swashplate oscillation.
• High-Pressure Capability: Rated pressure up to350 bar, peak pressure400 bar, ideal for heavy-duty operations.
• Variable Control Modes:
• Manual: Adjust displacement via mechanical lever.
• Hydraulic: Proportional control through remote hydraulic signals (e.g., electro-hydraulic proportional valves).
• Servo: High-precision closed-loop control for automated systems.
(2) Performance Parameters
• Displacement Range: 250 cm³/rev (theoretical), supports efficient operation under partial loads.
• Speed Range:
• Rated Speed: 1,500 rpm
• Maximum Speed: 1,800 rpm (short-term operation)
• Minimum Speed: 600 rpm (stable output)
• Volumetric Efficiency: ≥92% (standard conditions), minimizing energy loss.
• Total Efficiency: ≥88%, optimizing system power consumption.
(3) Materials & Durability
• Cylinder Block & Pistons: High-strength alloy steel with surface hardening for wear and corrosion resistance.
• Bearings & Seals: Heavy-duty roller bearings support the main shaft; lip seals prevent leakage.
• Fluid Compatibility: Compatible with mineral-based and synthetic hydraulic oils (e.g., HFA, HFB, HFC types), operating temperature range-20°C to +80°C.
3. Technical Advantages
• Energy Efficiency: Variable control adjusts displacement to match load demands, reducing idle losses.
• Rapid Response: Swashplate design minimizes mechanical inertia, enabling fast displacement changes.
• Low Noise Operation: Optimized flow path design reduces hydraulic pulsation, noise level ≤85 dB(A).
• Long Service Life: Key components last up to10,000 hours(with regular maintenance).
4. Applications
• Construction Machinery:
• Excavator travel/swing systems
• Crane luffing/telescoping mechanisms
• Road roller vibration systems
• Industrial Equipment:
• Injection molding machine clamping/injection systems
• Die-casting machine mold opening/closing drives
• Metal forming presses
• Marine & Offshore Engineering:
• Deck machinery (anchors, winches)
• Steering gear systems
5. Installation & Maintenance
(1) Installation Requirements
• Orientation: Install horizontally with the pump shaft to avoid lateral loads.
• Coupling: Use flexible couplings with alignment error ≤0.1 mm.
• Fluid Cleanliness: NAS 1638 Class 7 or ISO 4406 18/16; prevent contamination-induced wear.
(2) Routine Maintenance
• Fluid Inspection: Check oil quality every 500 hours; replace filters every 1,000 hours.
• Leakage Check: Inspect shaft seals and port connections for leaks.
• Temperature Monitoring: Investigate cooling systems if fluid exceeds 85°C.
• Abnormal Noise: Immediately stop and inspect for worn bearings or pistons.
(3) Troubleshooting
• Insufficient Output Pressure:
• Verify relief valve settings.
• Check for internal leakage (e.g., worn piston pairs).
• Flow Fluctuations:
• Clean variable control valves.
• Ensure fluid viscosity meets requirements.
• Unusual Noise:
• Tighten loose components.
• Replace worn bearings.
6. Safety & Compliance
• Protection Rating: IP55 (dust/water-resistant) for harsh environments.
• Certifications: Complies with ISO 10762, DIN 24333, and other international standards.
• Operational Safety: Never disassemble the pump under pressure; fully depressurize before maintenance.
7. Selection Guidelines
• System Matching: Choose displacement (e.g., 250 cm³/rev for large equipment) based on pressure/flow requirements.
• Control Mode: Select manual, hydraulic, or servo control based on automation needs.
• Environmental Adaptability: Use specialized fluids or cooling systems for extreme temperatures.
Note: Specific parameters may vary by manufacturer. Refer to the official technical manual or contact the supplier for detailed data. Regular maintenance significantly extends pump lifespan and reduces downtime.
