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What are the core technical parameters of the A4VG56 pump?
| Parameter | Specification |
|---|---|
| Nominal Displacement | 56 cm³/rev |
| Maximum Working Pressure | 400 bar (5801 psi) |
| Rated Working Pressure | 350 bar (5075 psi) |
| Maximum Speed | 2800 rpm |
| Rated Speed | 1500 – 2500 rpm |
| Minimum Speed | 600 rpm |
| Oil Viscosity Range | 15 – 400 mm²/s |
| Recommended Oil Temperature | -20°C to +95°C (-4°F to 203°F) |
| Oil Filtration Requirement | ≥ 10 μm (ISO 4406 Class 16/13) |
| Shaft Type | Tapered Keyed Shaft (ISO 286-2, Diameter: 38 mm / 1.496 in) |
| Mounting Standard | SAE J744 (4-bolt flange, SAE B) |
| Inlet/Outlet Port Size | Inlet: G1 1/2″ (BSPP), Outlet: G1 1/4″ (BSPP) |
| Dry Weight | Approx. 58 kg (127.87 lbs) |
| Volumetric Efficiency | ≥ 96% (At rated pressure and speed) |
| Mechanical Efficiency | ≥ 93% (At rated pressure and speed) |
| Control Signal | 4-20 mA (electro-hydraulic proportional control) |
What are the key performance advantages of the A4VG series pumps?
- Precision Electro-Hydraulic Control: EP2DM1 dual-mode regulation enables stepless displacement adjustment (0-100%) via 4-20mA signal, with electronic feedback for ±1% flow control accuracy—ideal for automated industrial systems.
- High-Pressure Durability: Reinforced cylinder block (alloy steel) and piston assembly (chrome-plated) withstand 400 bar max pressure, with a service life of ≥ 12,000 operating hours in heavy-duty conditions.
- Energy-Saving Design: Variable displacement matches flow output to system load, reducing power consumption by 25-30% compared to fixed-displacement pumps; integrated pressure cut-off prevents energy waste.
- Wide Environmental Adaptability: Enhanced wear-resistant coating (XDH configuration) and high-temperature seals (-20°C to +95°C) ensure reliability in dusty, humid, or high-heat environments (e.g., mining, steel mills).
- Low Noise & Vibration: Optimized swashplate design and hydraulic damping valve reduce noise to ≤ 80 dB(A) at rated speed, improving operator comfort and reducing equipment fatigue.
- Compact & Easy Integration: Modular structure with standardized mounting/port dimensions facilitates retrofitting and replacement in existing hydraulic systems.
