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R902520809 AA10VS071DRS/32R-VPB22U00E-S2183 German Rexroth piston pump

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R902520809 AA10VS071DRS/32R-VPB22U00E-S2183 German Rexroth piston pump

R902520809 AA10VS071DRS/32R-VPB22U00E-S2183 German Rexroth piston pump
R902520809 AA10VS071DRS/32R-VPB22U00E-S2183 German Rexroth piston pump

Large Image :  R902520809 AA10VS071DRS/32R-VPB22U00E-S2183 German Rexroth piston pump

Product Details:
Place of Origin: German
Brand Name: Rexroth
Certification: ISO
Model Number: R902520809 AA10VS071DRS/32R-VPB22U00E-S2183
Payment & Shipping Terms:
Minimum Order Quantity: 1
Packaging Details: Germany
Delivery Time: 2 weeks
Payment Terms: Western Union,T/T,D/P,D/A,L/C
Supply Ability: 100
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R902520809 AA10VS071DRS/32R-VPB22U00E-S2183 German Rexroth piston pump

Description
Weight​: 47 – 52 Kg Cleanliness Requirement​: ISO 4406 20/18/15​ Or Better
Media Temperature​: -20°C To +80°C​ (Start-up Viscosity < 1000 Mm²/s) Suitable Media​: Mineral Oils (HL, HLP), HLP-D, HVLP, HFC Fluids
Mounting Flange​: ISO 3019-2​ (Series 32)
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German Rexroth AA10VS071DRS piston pump

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R902520809 AA10VS071DRS/32R-VPB22U00E-S2183 German Rexroth Piston Pump
Order Number R902520809
Model AA10VSO71DRS/32R-VPB22U00E-S2183
Type Variable displacement axial piston pump (swashplate design, open circuit)
Nominal Displacement 71 cm³/rev
Control Type DRS (Pressure & Flow Control / Load Sensing)
Pressure Rating 280 bar (Continuous)
350 bar (Peak, intermittent)
Speed Range 1000 - 1800 rpm (Recommended)
Max. speed typically 2200 - 2400 rpm (limited by inlet conditions)
Rotation Direction Right-hand (R) (viewed from shaft end)
Shaft Type Splined shaft (SAE J744)
Port Connection VPB22U (SAE flange with metric threads, with through-drive)
Mounting Flange ISO 3019-2 (Series 32)
Seal Material NBR (Standard for mineral oil)
Suitable Media Mineral oils (HL, HLP), HLP-D, HVLP, HFC fluids
Media Temperature -20 °C to +80°C (Start-up viscosity < 1000 mm²/s)
Recommended Viscosity 16 - 68 mm²/s (ISO VG 32-68)
Cleanliness Requirement ISO 4406 20/18/15 or better
Weight Approx. 47 - 52 kg
Rexroth AA10VSO piston pump technical diagram
Frequently Asked Questions
What is DRS control, and how does it work?
DRS is a combined pressure-flow control with load sensing (LS).
  • Pressure Control: Limits system pressure to a set maximum (like a DR control)
  • Flow Control (LS): The pump automatically adjusts its swashplate angle to deliver only the flow required by the actuators, maintaining a constant pressure differential (Δp) across the control orifice. This results in significant energy savings compared to constant flow pumps
Can I mount an additional pump on the back?
Yes. The code VPB22U indicates this pump has a through-drive shaft (through-drive). You can mount a second pump (e.g., a gear pump for pilot flow or a second circuit) directly onto the back flange of this unit.
What are the critical installation precautions?
  • Case Drain (L port): Must be connected separately to tank with minimal backpressure (max 2-3 bar). Do not tee it into the main return line. This is critical for flushing heat and preventing seal/bearing failure
  • Suction Conditions: Ensure inlet pressure at port S is ≥ -0.8 bar (absolute) to avoid cavitation. Use short, large-diameter suction lines
  • Rotation: Confirm motor rotation matches the pump's "R" (clockwise) designation. Running backwards can destroy the pump
Why is my pump noisy or overheating?
  • Noise: Usually caused by cavitation. Check suction filter, inlet line for leaks, or oil viscosity being too high at startup
  • Overheating: Often due to excessive case pressure (blocked or undersized case drain line) or operating for long periods at high pressure with small displacement (high power loss)
How do I adjust the pressure setting?
The DRS control has a pressure limiter screw (usually under a cap on the control housing). Always adjust under controlled conditions with a pressure gauge:
  1. Loosen the locknut
  2. Turn the screw clockwise to increase pressure, counterclockwise to decrease
  3. Tighten the locknut and re-check the setting
Is an external relief valve still needed?
Yes. While the DRS control limits pressure, it is not a safety valve. You must install a separate system relief valve (e.g., a DB/DBW type) in the main line as a safety backup against control failure.
What is the difference between DR and DRS?
  • DR: Only pressure control (constant pressure variable pump)
  • DRS: Pressure control + Load Sensing. DRS adds the ability to match flow to demand, which is more energy-efficient for systems with varying flow requirements
Disclaimer: For precise installation and commissioning, always refer to the official Rexroth technical data sheet RE 25700 for A10VSO Series 32 pumps.
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