LRR030DLS2120NNN3C2NGA6NKNBNNNNNN Danfoss Hydraulic Pump 30cc 350bar

Product Overview

The LRR/LRL series is a key member of the Danfoss Sauer Series 45 open-circuit swashplate axial piston variable displacement pump family. Featuring a cradle swashplate design with a single servo piston and polymer-coated journal bearings, the Series 45 pumps deliver infinitely variable flow from zero to maximum displacement. LRR denotes right-hand (clockwise) rotation, while LRL denotes left-hand (counter-clockwise) rotation.

The Series 45 L-frame pumps are available in two standard displacements—25 cm³ and 30 cm³—making them the most compact members of the Series 45 family. The series supports a wide range of control options including Load Sensing (LS), Pressure Compensated (PC), constant power, and electro-proportional (EP) control, with a modular design that enables flexible adaptation to virtually any open-circuit hydraulic system architecture.

Our product provides a fully interchangeable direct replacement for the original Danfoss Sauer Series 45 LRR/LRL pump, with identical mounting dimensions, port specifications, and shaft configurations. Every unit undergoes 100% simulated duty-cycle testing—performance-validated under rated pressure, peak pressure, and full speed range to ensure volumetric efficiency, pressure-flow characteristics, control response, noise levels, and thermal characteristics meet or exceed original OEM specifications.

Model 1: LRR030DLS2120NNN3C2NGA6NKNBNNNNNN

Technical Specifications 

• Full Model: LRR030DLS2120NNN3C2NGA6NKNBNNNNNN

• Brand: Danfoss Sauer

• Series: Series 45 L-Frame

• Rotation: R = Right-hand (Clockwise)

• Max. Displacement: 30 cm³/rev (1.83 in³/rev)

• Rated Pressure: 210 bar (3,045 psi)

• Max. Working Pressure: 300 bar (4,350 psi)

• Peak Pressure: 350 bar (5,075 psi)

• Min. Input Speed: 500 rpm

• Max. Continuous Speed: 3,200 rpm

• Max. Speed: 3,600 rpm

• Theoretical Flow @ Rated Speed: 96 L/min (25.4 US gal/min)

• Theoretical Torque @ Max Displacement: 0.477 Nm/bar (291 lbf·in/1,000 psi)

• Mass Moment of Inertia: 0.00161 kg·m²

• Control Type: LS = Load Sensing + Pressure Compensated

• Factory Setting: PC 210 bar, LS Stand-By 20 bar

• Mounting Flange: SAE B 2-Bolt

• Shaft Style: Splined Shaft ANSI B92.1

• Port Position: Radial

• Weight (Axial/Radial Ports): 19.0 kg / 24.0 kg

Key Technical Advantages

1. Cradle Swashplate Design with Polymer-Coated Bearings
The Series 45 L-frame pumps feature a cradle swashplate design with a single servo piston and polymer-coated journal bearings. This design significantly reduces swashplate friction, improves control response speed, and extends overall pump life. A bias spring and internal forces increase the swashplate angle, while the servo piston decreases it, enabling stepless variable control.

2. Versatile Control Options
Supports Load Sensing (LS), Pressure Compensated (PC), remote compensation, Electro-Proportional (EP) control, and Electronic Torque Limiting (ETL). LS control enables the pump to dynamically adjust output flow based on load demand for energy-efficient operation. PLUS+1® compatibility allows seamless integration into electro-hydraulic control systems.

3. High Power Density & Wide Speed Range
Delivers 30 cm³ displacement and 3,600 rpm maximum speed in a compact L-frame package. Minimum speed of 500 rpm supports low-speed high-torque applications. Theoretical flow at rated speed reaches 96 L/min.

4. Through-Drive Capability
Supports through-drive configuration, allowing multiple pumps to be mounted in series on a single input shaft for multi-circuit system solutions.

5. Modular Mounting Configurations
Available with SAE B 2-bolt flange mounting, splined or keyed shaft options, and axial or radial port configurations for easy system integration.

Application Areas

• Construction equipment (mini-excavators, skid-steer loaders, rollers, pavers)

• Agricultural machinery (combines, windrowers, balers)

• Material handling equipment (forklifts, aerial work platforms)

• Forestry machinery

• Municipal and环卫 vehicles

• Industrial open-circuit hydraulic systems

Expert Maintenance Tips

1. Shaft seals and all O-rings must be replaced after every disassembly.

2. Pre-lubricate all moving parts with clean hydraulic fluid before assembly.

3. Monitor case drain flow regularly—an abnormal increase indicates potential piston or slipper wear.

4. Purge all air from the pump housing and prime with hydraulic oil before initial start-up to prevent dry-start damage.

5. Ensure hydraulic system filtration meets β₁₀ ≥ 75 (ISO 4406 cleanliness code不低于 18/16/13) to maximize pump service life.

6. LS control setting should not be less than 15 bar to ensure system stability.

Model 2: LRR025CPC18NNNNN3C2RGA6NAAANNNNNN

Product Overview

The LRR025CPC18NNNNN3C2RGA6NAAANNNNNN is a 25 cm³ displacement model in the Danfoss Sauer Series 45 L-frame open-circuit axial piston variable displacement pump family. This is the smallest displacement specification in the Series 45 L-frame, featuring CPC = Pressure Compensated Control with an 18 bar standard setting.

Our product provides a fully interchangeable direct replacement for the original Danfoss Sauer Series 45 LRR025 pump, with identical mounting dimensions, port specifications, and shaft configurations. Each unit undergoes 100% simulated duty-cycle testing—performance-verified at rated pressure, peak pressure, and full speed range to ensure all performance indicators meet or exceed OEM specifications.

Technical Specifications 

• Full Model: LRR025CPC18NNNNN3C2RGA6NAAANNNNNN

• Brand: Danfoss Sauer

• Series: Series 45 L-Frame

• Rotation: R = Right-hand (Clockwise)

• Max. Displacement: 25 cm³/rev (1.53 in³/rev)

• Rated Pressure: 260 bar (3,771 psi)

• Max. Working Pressure: 350 bar (5,075 psi)

• Peak Pressure: 350 bar (5,075 psi)

• Min. Input Speed: 500 rpm

• Max. Continuous Speed: 3,200 rpm

• Max. Speed: 3,600 rpm

• Theoretical Flow @ Rated Speed: 80 L/min (21.0 US gal/min)

• Theoretical Torque @ Max Displacement: 0.398 Nm/bar (243 lbf·in/1,000 psi)

• Mass Moment of Inertia: 0.00169 kg·m²

• Control Type: CPC = Pressure Compensated Control

• Factory Setting: PC 140–260 bar, LS Stand-By 20 bar

• Mounting Flange: SAE B 2-Bolt

• Shaft Style: Splined Shaft

• Port Position: Radial

• Weight (Axial/Radial Ports): 19.0 kg / 24.0 kg

Key Technical Advantages

1. Pressure Compensated Control (CPC)
CPC is one of the fundamental control options for the Series 45. When system pressure reaches the set value, the built-in pressure compensator automatically adjusts the swashplate angle, transitioning the pump output from flow control to pressure maintenance mode. This control method is simple, reliable, and responsive—ideal for applications requiring high pressure stability.

2. Cradle Swashplate Design with Low-Friction Bearings
Features a cradle swashplate design with polymer-coated journal bearings, significantly reducing friction losses and improving mechanical efficiency and service life.

3. High Power Density
Delivers 25 cm³ displacement with 3,600 rpm maximum speed and 80 L/min rated flow in a compact L-frame package. Power density is among the best in its class.

4. Through-Drive Capability
Supports through-drive configuration, allowing multiple pumps to be mounted in series for multi-circuit system solutions.

5. Superior Efficiency
The Series 45 pump features a nine-piston reciprocating design with precision-machined components, achieving up to 96% volumetric efficiency at 2,800 rpm. Abrasion-resistant coatings extend service life beyond 15,000 hours in dusty field conditions.

Application Areas

• Construction equipment (mini-excavators, skid-steer loaders, rollers)

• Agricultural machinery (combines, windrowers, balers)

• Material handling equipment (forklifts, aerial work platforms)

• Forestry machinery

• Industrial open-circuit hydraulic systems

Expert Maintenance Tips

1. Shaft seals and all O-rings must be replaced after every disassembly.

2. Thoroughly lubricate all moving parts with clean hydraulic fluid before assembly.

3. Monitor case drain flow—a significant increase during operation indicates piston or slipper wear.

4. Purge all air from the pump housing and prime with hydraulic oil before initial start-up.

5. Ensure hydraulic system filtration meets β₁₀ ≥ 75 (ISO 4406 cleanliness code不低于 18/16/13).

6. Regularly verify the pressure compensator setting to ensure it operates within the correct pressure range.