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Product Details:
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| Weight: | 39 Kg | Hydraulic Fluid: | Mineral Oils (HL, HLP), Water Glycol (HFC) |
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| Mounting Flange: | ISO 3019-2 (4-bolt, Metric) | Rotation Direction: | Clockwise (R) (viewed From Shaft End) |
| Nominal Speed: | 1500 Rpm | ||
| Highlight: | Rexroth variable displacement piston pump,A4VSO40DR piston pump with warranty,German Rexroth hydraulic piston pump |
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Parameter Category |
Parameter |
Specification / Description |
|---|---|---|
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General Information |
Manufacturer / Model |
Rexroth, Type A4VSO Series 10 |
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Part Number |
R902418820 |
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Pump Type |
Variable Displacement Axial Piston Pump (Swashplate Design) |
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Circuit Type |
Open Circuit |
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Hydraulic Performance |
Nominal Displacement |
40 cm³/rev |
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Nominal Pressure (Continuous) |
280 bar (Standard), 350 bar (DR Control Rated) |
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Peak Pressure (Intermittent) |
400 bar |
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Nominal Speed |
1500 rpm (Max ~2600 rpm, dependent on suction conditions) |
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Max Flow @ 1500 rpm |
~60 L/min |
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Control Type |
DR - Pressure Control (Pressure Compensator) |
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Mechanical Interface |
Shaft Type |
Standard Splined Shaft (Series 10) |
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Rotation Direction |
Clockwise (R) (viewed from shaft end) |
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Mounting Flange |
ISO 3019-2 (4-bolt, metric) |
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Port Configuration |
PPB13: SAE flanged ports, metric screws, 13 series port plate |
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Through Drive |
N00: No through-drive capability |
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Sealing & Media |
Seal Material |
NBR (Standard for mineral oil) |
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Hydraulic Fluid |
Mineral oils (HL, HLP), water glycol (HFC) |
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Weight |
Approx. 39 kg |
Q1: What is the main application difference between A4VSO and A10VSO?
A: A4VSO is a heavy-duty industrial pump designed for 350 bar continuous pressure (vs. A10VSO's typical 280 bar). It features a robust bearing design for high radial loads and is commonly used in metal forming, injection molding, and heavy machinery where high pressure and reliability are critical.
Q2: How does the DR control work on this pump?
A: The DR control is a pressure compensator. Below the set pressure, the pump delivers maximum flow (40 cm³/rev). When system pressure reaches the set point (adjusted via the control cover screw), the swashplate automatically de-strokes to maintain constant pressure, delivering only the flow needed to compensate for leaks. This saves energy compared to a fixed pump with a relief valve.
Q3: What is the recommended drive motor power?
A: At 1500 rpm and 350 bar, the pump requires approximately 35 kW of mechanical input power. It is recommended to use a 37 kW (50 HP) electric motor for safe continuous operation. Always check the torque requirements at your specific operating pressure.
Q4: Can I add a gear pump to the through-drive?
A: No. This specific variant has the code N00, which means no through-drive. The shaft does not protrude from the rear housing to drive an auxiliary pump. If you need a multi-pump configuration (e.g., for a charge pump), you must select a version with a through-drive code (e.g., K01, K02, etc.).
Q5: What are the critical suction conditions?
A: The A4VSO requires good inlet conditions. At 1500 rpm, the inlet pressure should be ≥ 0.8 bar absolute (≈ -0.2 bar gauge) to avoid cavitation. For higher speeds (up to 2600 rpm), a pressurized inlet or a boost pump is mandatory. The optimal viscosity range is 16–160 mm²/s.
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