R902482660 A10VSO71DR/31R-VPA42N00 Piston pump from Rexroth, Germany
| Parameter | Specifiion |
|---|---|
| Manufacturer / Series | Rexroth A10VSO Series 31 |
| Order Code | R902482660 |
| Full Model | AA10VSO71DR/31R-VPA42N00 |
| Pump Type | Axial Piston Variable Pump (Swashplate Design, Open Circuit) |
| Control Type | DR (Pressure Control / Pressure Compensator) |
| Max. Displacement | 71 cm³/rev |
| Nominal Pressure | 280 bar |
| Peak Pressure | 350 bar (intermittent) |
| Nominal Size | NG 71 |
| Rotation Direction | Right-hand (R, viewed from shaft end) |
| Shaft Type | Tapered shaft 1:5 with parallel key (DIN 6885) |
| Ports | S (Suction), B (Pressure), L (Case Drain) |
| Port Size | Code 42 (SAE flange ports, UNC threads) |
| Mounting Flange | ISO 3019-2 / SAE J744 2-bolt |
| Max. Speed | 2200 rpm (at full displacement) |
| Max. Flow | ~156 L/min (at 2200 rpm, theoretical) |
| Seal Material | FKM (Viton) |
| Hydraulic Fluid | Mineral oils (HL, HLP), HETG, HEES, HFDU |
| Operating Temperature | -20°C to +80°C |
| Weight | Approx. 35.2 kg |
| Country of Origin | Germany |
The DR is a Pressure Compensator. It automatically reduces the pump's displacement (destrokes) when the system pressure reaches the preset value. This maintains constant pressure while minimizing energy consumption and heat generation.
This code defines the mechanical configuration:
- V: FKM (Viton) seals for high temperature and chemical resistance
- P: Tapered shaft (1:5) with a parallel key
- A42: Port size code 42 (SAE flange ports with UNC threads)
- N00: No through-drive (solid shaft end)
The primary difference is the displacement size:
- A10VSO71: 71 cm³/rev, providing higher flow output (~156 L/min vs ~117 L/min at same speed)
- A10VSO45: 45 cm³/rev, smaller size for lower flow requirements
This model uses a simpler DR pressure control, whereas the previous ones used DFR1 (pressure + load sensing).
The L Port (Case Drain) must be connected directly to the tank. It relieves internal leakage pressure to protect the shaft seal. Maximum allowable backpressure is typically 2 bar.
No. The A10VSO DR is designed exclusively for open-circuit appliions (pump → valve → actuator → tank). For closed-loop hydrostatic transmissions, you would need an A4VG or A2FM series unit.
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