Danfoss 90R/90L Series hydraulic pump
3 month ago
Product details
90-L-055-MA-1-BC-60-S-3-C6-C-03-GBA-38-38-20
90-L-055-KT-1-NN-80-S-3-S1-C-02-GBA-42-42-24
90-L-055-HF-5-CD-80-D-4-S1-L-03-GBA-35-35-24
90-L-055-DD-5-NN-60-R-4-S1-D-G8-GBA-35-35-24
90-L-055-HF-5-AB-80-L-3-S1-C-03-GBA-35-35-28
90-L-055-KA-5-CD-60-P-3-C6-D-03-GBA-35-35-24
90-L-055-HF-1-BC-80-P-3-S1-C-02-GBA-35-35-24
90-L-055-KA-5-NN-80-R-3-S1-D-03-GBA-35-35-24
90-L-055-DD-1-NN-80-S-3-S1-D-G8-GBA-26-26-24
90-L-055-KN-1-BC-80-S-4-S1-C-03-GBA-32-32-24
90-L-055-KP-1-AB-60-S-4-S1-C-03-GBA-29-14-24
90-L-055-KP-1-NN-60-S-3-S1-C-03-GBA-42-42-24
90-L-055-MA-1-NN-80-R-3-S1-C-03-GBA-17-17-24
90-L-055-KP-1-NN-80-P-3-S1-C-03-GBA-26-26-20
90-L-055-KN-5-CD-80-R-4-S1-D-03-GBA-42-42-24
90-L-055-HS-1-NN-80-P-4-S1-C-03-GBA-35-35-24
90-L-055-KP-1-CD-80-S-3-S1-C-01-GFD-35-35-30
90-L-055-KP-1-NN-80-S-3-S1-C-01-GFD-35-35-30
90-L-055-MQ-1-NN-80-R-4-S1-C-02-GFK-42-42-20-F026
90-L-055-KA-1-CD-60-L-3-S1-C-03-GBA-35-35-24
90-L-055-KA-5-BC-80-S-3-S1-C-03-GBA-35-35-24
90-L-055-MA-5-BC-60-S-4-S1-C-C5-GBA-35-35-24
90-L-055-KT-1-CD-80-R-3-S1-C-06-GFK-29-29-24
90-L-055-MD-1-NN-80-R-3-C6-C-02-GBA-35-35-20
Danfoss 90R/90L Series Hydraulic Pump: Detailed Introduction
I. Product Overview
The Danfoss 90R/90L series hydraulic pumps are closed-loop axial piston pumps specifically designed by Danfoss for high-demand hydraulic systems. Renowned for their high-pressure, high-efficiency, and stable performance, these pumps are widely used in construction machinery, road machinery, oil and gas equipment, mining machinery, and other industrial applications. Featuring a compact design and supporting multiple control modes, they seamlessly integrate into various hydraulic systems, delivering powerful and reliable power support.
II. Core Performance Parameters
1. High-Pressure Capability
• Maximum pressure: Up to 48 MPa (rated pressure of 45 MPa for some models), enabling stable operation under harsh conditions.
• Rated speed range: 2,300–4,200 rpm, adaptable to diverse operating requirements.
2. Displacement Options
• Available in multiple displacement models, such as 90R055, 90R075, 90R100, and 90R130, meeting varying flow demands.
• Displacement range: 55 cm³/rev to 130 cm³/rev, offering flexibility for different applications.
3. Control Modes
• Supports electronic, hydraulic, and mechanical manual control, allowing users to choose based on actual needs for enhanced operational convenience and precision.
• Some models feature dual-coil servo valves for high-gain control, enabling precise flow adjustment.
4. Structure and Weight
• Compact pump body design with a weight of approximately 50 kg, facilitating easy installation and maintenance.
• Example dimensions: 354.9 mm × 273.78 mm × 496.86 mm (specific dimensions vary by model).
III. Technical Advantages
1. High Efficiency and Stability
• Constructed with high-quality materials and advanced manufacturing processes, ensuring a robust and durable pump body for long-term stable operation.
• Integrated charge pump design provides supplementary hydraulic oil, cools the oil, and supplies pressure oil for control, enhancing system efficiency.
2. Flexible Adaptability
• Compatible with 90 series motors or other hydraulic products to form a complete hydraulic drive system for fluid transmission and control.
• Supports multiple mounting options and can be equipped with auxiliary mounting flanges for tandem pump configurations.
3. Intelligent Control
• Compatible with Plus+1 controllers and sensors, enabling remote monitoring and fault diagnosis for improved system intelligence.
• Electrically controlled displacement pumps feature mechanical limit mechanisms to prevent damage to the control mechanism during rapid changes in electrical input signals.
4. Safety Protection
• Automatically returns to neutral position in case of external electrical control signal failure or insufficient charge pressure, ensuring system safety.
• Automatically returns to neutral position when the prime mover stops running, preventing accidental startup risks.
IV. Application Areas
1. Construction Machinery
• Provides powerful support for cement mixers, concrete pump trucks, and other equipment, ensuring smooth construction operations.
2. Road Machinery
• Essential for road mixers, cold recyclers, milling machines, pavers, and other road construction and maintenance equipment.
3. Oil and Gas Equipment
• Delivers stable hydraulic power for oil extraction, transportation, and other processes, ensuring reliable equipment operation.
4. Mining Machinery
• Plays a critical role in mining, ore transportation, and other processes, improving production efficiency and safety.
5. Agricultural Machinery
• Optimizes the operational and driving performance of harvesters and other agricultural equipment, adapting to various working conditions.
V. Maintenance and Upkeep
1. Regular Inspections
• Inspect axial seals and O-rings every 5,000 operating hours, replacing worn components promptly.
• Periodically clean the variable mechanism and check for shell seal leakage.
2. Oil Management
• Use hydraulic oil with a cleanliness level of NAS 8 or higher to prevent particle-induced wear on the port plate.
• Maintain oil temperature between 30–60°C for optimal system performance.
3. Troubleshooting
• Excessive Pressure Fluctuations: Check for air ingress or blockages in the suction line; verify filter and seal integrity.
• Abnormal Noise: Investigate piston/slipper wear or oil foaming; replace worn parts and perform oil replacement/air bleeding.
• Insufficient Flow: Clean the variable mechanism and check for shell seal leakage.
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