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R910916805 AA10VS028DFR1/31R-VPA12N00 German Rexroth Piston Pump
High-performance axial piston variable pump with advanced pressure and flow control for industrial hydraulic systems.
Technical Specifiions
Manufacturer / Series
Rexroth A10VSO Series 31
Order Code
R910916805
Full Model
AA10VS028DFR1/31R-VPA12N00
Pump Type
Axial Piston Variable Pump (Swashplate Design, Open Circuit)
Control Type
DFR1 (Pressure & Flow Control / Load Sensing)
Max. Displacement
28 cm³/rev
Nominal Pressure
280 bar
Peak Pressure
350 bar
Nominal Size
NG 28
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), X (LS Control)
Port Size
Code 12 (Metric threads)
Mounting Flange
ISO 3019-2 (SAE 2-bolt)
Max. Speed
3000 rpm (at full displacement)
Max. Flow
~84 L/min (at 3000 rpm)
Seal Material
FKM (Viton)
Hydraulic Fluid
Mineral oils (HL, HLP), HETG, HEES, HFDU
Operating Temperature
-20°C to +80°C
Weight
Approx. 17.8 kg
Country of Origin
Germany
Related Models
R910939026 A A10VSO 28 DFLR/31R-PPA12N00
R910936062 A A10VSO 28 DFLR/31R-PPA12N00
R910906755 A A10VSO 28 DFR /31L-PPA12N00
R910904363 A A10VSO 28 DFR /31R-PPA12K01
R902417564 A A10VSO 28 DFR /31R-PPA12KB3
R910903160 A A10VSO 28 DFR /31R-PPA12N00
R910979557 A A10VSO 28 DFR /31R-PSA12N00
R910910660 A A10VSO 28 DFR /31R-VPA12N00
R910926318 A A10VSO 28 DFR1/31R-PPA12K01
R910929004 A A10VSO 28 DFR1/31R-PPA12K02
R910910590 A A10VSO 28 DFR1/31R-PPA12N00
R910946322 A A10VSO 28 DFR1/31R-PPA12N00 -SO410
R910974869 A A10VSO 28 DFR1/31R-PSA12N00
R902501926 A A10VSO 28 DG /31R-VPA12N00
R910907919 A A10VSO 28 DR /31R-PPA12K01
R910909760 A A10VSO 28 DR /31R-PPA12K02
R910907369 A A10VSO 28 DR /31R-VPA12N00
R910986352 A A10VSO 28 DRG /31L-PPA12N00
R910939601 A A10VSO 28 DRG /31R-PPA12N00
R910986796 A A10VSO 28 DRG /31R-PSA12N00
R902421254 A A10VSO 28 DRG /31R-VPA12K01
R910925052 A A10VSO 28 FHD /31R-PPA12K01
Frequently Asked Questions
What is the function of the "DFR1" control?
The DFR1 is a combined Pressure and Flow Controller. It provides two key functions:
Pressure Limiting: Acts as a pressure compensator, destrokeing the pump when system pressure reaches the set value.
Load Sensing (Flow Control): Automatically adjusts displacement to maintain a constant pressure differential (Δp) across a downstream orifice, providing load-independent flow control for improved energy efficiency.
What does the "VPA12N00" suffix indie?
This code defines the mechanical configuration:
V: FKM (Viton) seals, offering superior chemical and temperature resistance.
P: Tapered shaft (1:5) with a parallel key.
A12: Port size code 12 (metric threads).
N00: No through-drive (solid shaft end, cannot mount additional pumps on the shaft).
What is the key difference between this A10VSO28 and the previously mentioned A10VSO18?
The primary difference is the displacement size:
A10VSO28: 28 cm³/rev, providing higher flow output (~84 L/min vs ~59 L/min at same speed).
A10VSO18: 18 cm³/rev, smaller size for lower flow requirements.
Both share the same DFR1 control type and Series 31 design.
What are the X and L ports used for?
X Port (Control): Load-Sensing (LS) Feedback. It connects to the downstream system to sense the load pressure, allowing the pump to adjust its displacement to maintain the set Δp.
L Port (Case Drain): Must be connected directly to the tank. It relieves internal leakage pressure to protect the shaft seal (max backpressure typically 2 bar).
Can this pump be used in a closed-loop system?
No. The A10VSO DFR1 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.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Total Annual:
1 million-10 millon
Employee Number:
>50
Ecer Certification：
Verified Supplier
Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha... Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha...
