803084381 XCMG GR2605 motor grader priority valve

803084381 XCMG GR2605 motor grader priority valve

Part Number: 803084381
Compatible Model: XCMG GR2605 Series Motor Grader
Product Positioning: A customized oil distribution core for the hydraulic system of the GR2605 motor grader, responsible for allocating hydraulic oil flow according to priority, ensuring that key actuators receive stable oil supply first.

Key Technical Parameters

1. Pressure and Flow Performance
Rated Working Pressure: 18MPa
Maximum Working Pressure: 25MPa
Priority Oil Supply Flow Rate: 45L/min (suitable for steering system flow requirements)
Residual Pressure Loss: ≤0.3MPa (at rated flow rate)

2. Structure and Dimensions
Structure Type: Pilot-operated priority valve (with pressure compensation function)
Control Method: Hydraulic pilot control, highly responsive
Installation Method: Threaded installation, conforming to original equipment manufacturer (OEM) piping interface standards
Inlet/Outlet Diameter: G1 1/4″ (suitable for overall machine hydraulic piping specifications)

3. Material and Weather Resistance
Valve Body Material: High-quality alloy structural steel forging (heat treatment), tensile strength ≥450MPa
Valve Core Material: Precision alloy copper (surface nitriding treatment), wear-resistant and corrosion-resistant
Seals: Imported fluororubber (FKM) sealing components, suitable for working environments from -40℃ to 125℃
Contamination Resistance Rating: ISO 19/16 (Adapted to the hydraulic oil cleanliness requirements of construction machinery)

Core Functions and Application Scenarios

1. Main Functions
Priority Oil Supply: Ensures that critical circuits such as the steering system receives sufficient hydraulic oil first, avoiding steering lag during operation.
Flow Distribution: Intelligently distributes remaining hydraulic oil to the working device circuits, enabling multi-circuit collaborative operation.
Pressure Compensation: Automatically compensates for system pressure loss, ensuring oil supply stability under different working conditions.
Overload Protection: Integrated safety valve prevents system overpressure, protecting valves and pipelines.

2. Applicable Working Conditions
Heavy-duty collaborative operations such as highway construction, mine stripping, and airport runway construction.
Complex working conditions with multiple circuits operating simultaneously and large fluctuations in flow demand.
Harsh working environments with high and low temperatures, high dust levels, and mud and water erosion.

Product Advantages

Original Equipment Manufacturer Compatibility: Fully compatible with GR2605 Hydraulic system interface and control logic allow for direct installation without modification. Precise flow distribution: Pilot-operated structure design ensures flow distribution error ≤5%, guaranteeing stable oil supply to critical circuits. High efficiency and low consumption: Minimal residual pressure loss improves the overall efficiency of the hydraulic system. Robust and durable: High-strength materials and precision machining provide outstanding impact and wear resistance, resulting in a long service life. Stable adaptability: Wide-temperature sealing design and anti-contamination structure enable continuous operation under harsh conditions.

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