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1. What is the detailed interpretation of the two models: “A10VSO 71 DFR/31R-PPA12N00” and “A10VSO140DFR1/31R-PKD62K02-S0355”?
| Model Segment | A10VSO 71 DFR/31R-PPA12N00 Explanation | A10VSO140DFR1/31R-PKD62K02-S0355 Explanation |
|---|---|---|
| A10VSO | Series Identifier: Axial Piston Variable Displacement Pump (High-pressure, oil-immersed valve plate design for industrial/mobile systems) | Same as left (Consistent series definition for A10VSO lineup) |
| 71 / 140 | Nominal Displacement: 71 cm³/rev (cubic centimeters per revolution) | Nominal Displacement: 140 cm³/rev (Larger displacement for high-flow demand) |
| DFR / DFR1 | Control Type: D=Dual control (pressure + flow); FR=Hydraulic pilot control with pressure compensation; “1” in DFR1 denotes standard control valve version | Same control logic (Dual pressure-flow control with hydraulic pilot, optimized for dynamic load adjustment) |
| 31R | Mounting & Rotation: 31=SAE 3-bolt flange (Complies with SAE J744 Class 3); R=Clockwise rotation (Viewed from shaft end) | Same mounting standard and rotation direction (Ensures interchangeability in flange installation) |
| PPA12N00 | Configuration Code: PP=Integrated pressure relief valve; A12=Relief valve setting (280 bar); N00=Factory standard calibration (No custom modifications) | PKD62K02-S0355: PK=Integrated pressure relief + check valve; D62=Relief valve setting (350 bar); K02=Special damping configuration; S0355=Production batch & quality traceability code |
2. What are the core technical parameters of the two pumps?
| Parameter | A10VSO 71 DFR/31R-PPA12N00 | A10VSO140DFR1/31R-PKD62K02-S0355 |
|---|---|---|
| Nominal Displacement | 71 cm³/rev | 140 cm³/rev |
| Maximum Working Pressure | 350 bar (5075 psi) | 350 bar (5075 psi) |
| Rated Working Pressure | 315 bar (4568 psi) | 315 bar (4568 psi) |
| Maximum Speed | 2400 rpm | 2000 rpm |
| Minimum Speed | 500 rpm | 500 rpm |
| Oil Viscosity Range | 10-400 mm²/s | 10-400 mm²/s |
| Recommended Oil Temperature | -20°C to +90°C (-4°F to 194°F) | -20°C to +90°C (-4°F to 194°F) |
| Oil Filtration Requirement | ≥10 μm (ISO 4406 Class 16/13) | ≥10 μm (ISO 4406 Class 16/13) |
| Shaft Diameter | 40 mm (1.57 in) | 50 mm (1.97 in) |
| Mounting Standard | SAE J744 (4-bolt flange) | SAE J744 (4-bolt flange) |
| Inlet/Outlet Port Size | Inlet: G1 1/2″, Outlet: G1 1/4″ | Inlet: G2″, Outlet: G1 1/2″ |
| Dry Weight | ~48 kg (105.8 lbs) | ~85 kg (187.4 lbs) |
| Volumetric Efficiency | ≥95% | ≥95% |
3. What are the key differences between the two models?
- Displacement & Flow Capacity: The A10VSO140 (140 cm³/rev) has nearly double the nominal displacement of the A10VSO71 (71 cm³/rev), making it suitable for systems requiring higher flow rates (e.g., large hydraulic presses, heavy excavators).
- Maximum Speed: The A10VSO71 supports a higher maximum speed (2400 rpm) than the A10VSO140 (2000 rpm), adapting to faster motor-driven scenarios.
- Configuration Details: The A10VSO140 includes an integrated check valve (PK code) and special damping (K02) for enhanced system stability, while the A10VSO71 uses a standard pressure relief valve (PP code) for basic overload protection.
- Physical Dimensions: The A10VSO140 has a larger shaft diameter (50 mm vs. 40 mm) and higher weight (85 kg vs. 48 kg) to accommodate its higher load capacity.
