White Danfoss 890 Series Gear Pump | 890-EI-0320 890-EI-0400 890-EI-0630 | Hydraulic Pump

The 890 Series high-pressure gear pumps from Chengyuan Hydraulic are engineered for the most demanding mobile and industrial hydraulic applications, offering full compatibility with White (Danfoss Group) standards. Unlike standard aluminum gear pumps, the 890 series features a heavy-duty cast iron construction, ensuring exceptional structural rigidity and preventing internal leakage caused by housing expansion under high pressure. For models 890-EI-0320, 0400, and 0630, we implement advanced pressure-compensated thrust plates. Every pump undergoes 100% simulated full-load testing to guarantee performance parity with the OEM, ensuring 100% original-place interchangeability.

Technical Specifications :

• Series Model: 890 Series (Group 3 frame size)

• Displacement Options: 32.0 cc (0320) / 40.0 cc (0400) / 63.0 cc (0630)

• Continuous Operating Pressure: 280 bar (28 MPa)

• Intermittent Peak Pressure: 310 bar (31 MPa)

• Maximum Speed: Up to 3000 rpm (Specific to displacement)

• Shaft Configurations: RS2 (SAE B 13-tooth spline) / RK2 (SAE B keyed)

• Mounting Flange: C302 / C621 (Standard SAE 2-bolt)

• Housing Material: High-strength Cast Iron

Key Technical Advantages:

• Two-Piece Cast Iron Construction: The heavy-duty cast iron housing provides superior fatigue resistance and thermal stability compared to aluminum, maintaining precise internal clearances even under 280 bar pressure fluctuations.

• Floating Pressure Compensation: The thrust plates utilize a pressure-balanced mechanism to automatically adjust axial clearance. This ensures over 95% volumetric efficiency throughout the entire pressure range.

• Heavy-Duty DU Bearings: High-capacity self-lubricating bearings support the gear shafts, offering excellent radial load capability and reducing friction losses for a longer service life in high-cycle applications.

• Optimized Gear Geometry: Precision-ground gears with modified tooth profiles minimize flow pulsation and trapping, resulting in quieter operation and smoother hydraulic power delivery.

Application Areas:

• Mobile Machinery: Steering circuits for wheel loaders and auxiliary circuits for excavators.

• Agricultural Equipment: High-power tractor hitch systems and harvester drives.

• Industrial Systems: Scrap shearers, hydraulic balers, and heavy-duty material handling equipment.

Expert Maintenance Tips:

• Radial/Axial Load Prevention: Avoid direct axial impact on the shaft. Always use a flexible coupling for installation to protect the internal thrust washers from premature wear.

• Oil Cleanliness Standards: Cast iron pumps are sensitive to particulate contamination. Maintain system filtration at NAS Class 9 (ISO 20/18/15) or better.

• Inlet Port Inspection: Given the high displacement of the 890 series, ensure the inlet line is perfectly sealed and properly sized to prevent cavitation at high RPMs, which can score the gear faces.