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R910920969 AA10VS0100DFR/31R-VPA12N00 German Rexroth hydraulic piston pump

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R910920969 AA10VS0100DFR/31R-VPA12N00 German Rexroth hydraulic piston pump

R910920969 AA10VS0100DFR/31R-VPA12N00 German Rexroth hydraulic piston pump
R910920969 AA10VS0100DFR/31R-VPA12N00 German Rexroth hydraulic piston pump

Large Image :  R910920969 AA10VS0100DFR/31R-VPA12N00 German Rexroth hydraulic piston pump

Product Details:
Place of Origin: German
Brand Name: Rexroth
Certification: ISO
Model Number: R910920969 AA10VS0100DFR/31R-VPA12N00
Payment & Shipping Terms:
Minimum Order Quantity: 1
Packaging Details: wooden box
Delivery Time: 2 weeks
Payment Terms: Western Union,T/T,D/P,D/A,L/C
Supply Ability: 100

R910920969 AA10VS0100DFR/31R-VPA12N00 German Rexroth hydraulic piston pump

Description
Rotation Direction​: Right-hand (R)​ (viewed From Shaft End) Shaft Type​: Splined Shaft​ (SAE Standard)
Port Connection​: VPA12N Mounting Flange​: ISO 3019-2​
Weight: 45 – 50 Kg
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Rexroth hydraulic piston pump

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German Rexroth piston pump

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AA10VS0100DFR piston pump

R910920969 AA10VS0100DFR/31R-VPA12N00 German Rexroth Hydraulic Piston Pump
Technical Specifications
Parameter Specification
Order Number R910920969
Model AA10VSO100DFR/31R-VPA12N00
Type Variable displacement axial piston pump (swashplate design, open circuit)
Nominal Displacement 100 cm³/rev
Control Type DFR (Pressure Cut-off + Flow Control / Load Sensing)
Pressure Rating 280 bar (Continuous)
350 bar (Peak, intermittent)
Speed Range 1500 - 1800 rpm (Recommended)
Max. speed 2000 - 2400 rpm (limited by inlet conditions)
Rotation Direction Right-hand (R) (viewed from shaft end)
Shaft Type Splined shaft (SAE standard)
Port Connection VPA12N (SAE flange, side ports, no through-drive)
Mounting Flange ISO 3019-2 (Series 31)
Seal Material NBR (Standard for mineral oil)
Suitable Media Mineral oils (HL, HLP), HLP-D, HVLP
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. 45 - 50 kg
Rexroth AA10VSO hydraulic piston pump technical diagram
Frequently Asked Questions
What is DFR control, and how does it work?

DFR is a combined pressure-flow control with load sensing (LS).

  • Pressure Control: Limits system pressure to a set maximum (like a relief valve).
  • 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?

No. The code N00 in VPA12N00 explicitly indicates no through-drive. The shaft does not extend through the rear cover, so you cannot mount a second pump (gear or piston) on the back of this unit. If you need a tandem pump configuration, you must order a variant with a through-drive code (e.g., ending in K...).

What are the critical installation precautions?
  • Case Drain (L ports): This pump has two case drain ports. They must be connected separately to tank with minimal backpressure (max 2-3 bar). Do not tee them 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 and flow settings?

The DFR control has two adjustment screws (usually under caps on the control housing):

  1. Pressure Limiter: Sets the maximum system pressure (clockwise to increase).
  2. Flow Controller (LS Δp): Sets the pressure differential for load sensing (typically set to 10-20 bar).

Always adjust under controlled conditions with a pressure gauge.

Is an external relief valve still needed?

Yes. While the DFR 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 DFR and DRS?
  • DFR: Typically used in industrial applications with explicit pressure/flow control.
  • DRS: Often used in mobile applications with a stronger emphasis on load sensing. The functional principle is very similar, but the control response and internal pilot circuitry may differ.
Disclaimer: For precise installation and commissioning, always refer to the official Rexroth technical data sheet RE 25700 for A10VSO Series 31 pumps.

Contact Details
Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd.

Contact Person: Mr. liyun

Tel: +8615280488899

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