A10VO140DFLR/31R-VQC12N00 Hydraulic piston pump
3 week ago
Product details
A10VO140DFLR/31R-VQC12N00 Hydraulic Axial Piston Variable Pump
Product Overview
A10VO140DFLR/31R-VQC12N00 is a swashplate-type variable displacement axial piston pump of Rexroth A10VO Series 31, specially designed for hydrostatic open-circuit hydraulic systems on mobile machinery.
DFLR control: integrated pressure, flow and constant power triple function regulator. The pump continuously adjusts displacement by changing swashplate angle. The output flow is proportional to rotating speed and displacement. This model adopts FKM fluorine rubber sealing, clockwise rotation, SAE standard port layout, without through-drive capability. Widely used as original hydraulic power source or aftermarket replacement for construction machinery.
A10VO140DFLR/31R‑VQC12N00 is a high‑pressure variable displacement Hydraulic piston pump. As a core power component, this hydraulic pump supplies stable flow and pressure for the complete hydraulic system. It adopts DF‑LR load‑sensing pressure cut‑off control, which is widely used for original matching and aftermarket replacement of construction machinery and heavy‑duty industrial equipment.
Model Code Brief Explanation
- A10VO：Open circuit axial piston variable pump for mobile equipment
- 140：Theoretical displacement 140 cm³/r
- DFLR：Pressure + Flow + Constant Power composite control
- 31R：31 Series, clockwise rotation (viewed from shaft end)
- VQC12N00：FKM seal, SAE shaft, standard oil port arrangement, no through drive
Key Technical Specifications
- Model: A10VO140DFLR/31R-VQC12N00
- Type: Swashplate axial piston variable pump
- Displacement: 0 ~ 140 cm³/rev
- Nominal working pressure: 280 bar
- Peak pressure: 350 bar
- Max rated speed: 1800 rpm
- Rotation direction: Clockwise (R)
- Control mode: DFLR constant power, pressure & flow combined control
- Sealing material: FKM fluororubber
- Working medium: Anti-wear hydraulic oil (HLP/HVLP)
- Fluid temperature: -20℃ ~ +85℃
- Recommended oil cleanliness: NAS 8 or better
- Configuration: Two case drain ports
- Installation standard: SAE mounting flange & SAE oil ports
- Net weight: Approx. 67 kg
Working Principle
The drive shaft drives the cylinder block and piston assembly to rotate. The pistons reciprocate under the restriction of swashplate, completing oil suction and pressure delivery.
The built-in DFLR regulator detects system pressure and output flow simultaneously. When the load pressure rises, the regulator automatically reduces pump displacement to limit input torque (constant power protection). It realizes automatic matching between pump output power and engine power, avoiding engine stall under heavy load. It also maintains stable system pressure and adjustable flow to satisfy variable working demands.
Core Advantages
1. DFLR three-function integrated control: constant power + pressure control + load sensing flow control, high energy efficiency
2. Optimized friction pairs, low noise, stable performance under long continuous operation
3. Excellent suction performance, effectively reducing cavitation risks
4. Compact structure, high power-to-weight ratio, suitable for limited installation space of mobile machinery
5. Standard SAE flange and port dimensions, high interchangeability with original pumps
6. Robust swashplate rotary group, long service life under frequent load fluctuation
7. Fluorine rubber sealing option, compatible with wide range of hydraulic media
8. Fast regulator response, good dynamic characteristics for frequent working condition changes
Typical Applications
- Medium & large excavators, wheel loaders
- Road rollers, pavers, road construction machinery
- Mobile cranes, aerial work platforms
- Agricultural large harvesters and tractors
- Municipal engineering vehicles and special mobile hydraulic equipment
- Open circuit main hydraulic drive systems for mobile machinery
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