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Help CenterDanfoss FRR074BLS2520NNN3S1B2A1NNNNNNNNNN Hydraulic Axial Piston Pump
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Danfoss FRR074BLS2520NNN3S1B2A1NNNNNNNNNN Hydraulic Axial Piston Pump
Overview
The Danfoss FRR074BLS2520NNN3S1B2A1NNNNNNNNNN is a high-performance, variable-displacement axial piston pump from Danfoss's Series 45 FRR family. Engineered for open-circuit hydraulic systems, this pump is designed to deliver precise, reliable, and efficient power for a wide range of demanding mobile and industrial applications.
Technical Features
Variable Displacement Axial Piston Design – The pump utilizes a swashplate design, allowing for stepless, precise flow control by adjusting the displacement. This enables the pump to match output exactly to the system's needs, improving efficiency.
High Pressure Capability – The FRR074 has a maximum continuous working pressure of 310 bar (4,495 psi) and can withstand peak pressures up to 400 bar (5,800 psi). This high pressure capability makes it suitable for the most demanding hydraulic tasks.
Displacement & Performance – With a maximum displacement of 74 cc/rev, this pump provides substantial flow for high-power applications. Its continuous speed range is from 500 to 2,400 rpm, with a rated speed of 2,400 rpm. The theoretical flow at rated speed is 178 L/min.
Variable Control Technology – The pump supports advanced control options, including pressure compensation (automatically adjusting displacement to maintain stable flow) and load-sensing (regulating output pressure based on actual load demands). The specific model code "LS25" indicates a Load-Sensing control with a 25 bar pressure differential setting.
High-Reliability & Durable Construction – Built with high-strength alloy steel piston pairs with specialized surface treatment, the pump offers enhanced wear resistance. A robust double-row tapered roller bearing structure supports both radial and axial forces, contributing to a long service life of over 10,000 hours.
Open Circuit & Bi-Directional Capability – Designed for open-circuit applications where fluid returns to the tank, the pump can be configured for either clockwise or counter-clockwise rotation (indicated by R or L in the model code).
Versatile Mounting & Porting – The Series 45 pumps offer a variety of connecting flanges and shaft types for flexible installation. The "B2A1" suffix in the model code indicates the specific control and porting configuration.
Core Functionalities
Precise Flow Control – As a variable displacement pump, its output flow is infinitely adjustable. By controlling the swashplate angle, the pump can deliver exactly the flow rate required, from zero to maximum displacement.
Energy-Efficient Operation – The combination of load-sensing and pressure compensation controls ensures the pump only generates the power needed for the load. This reduces energy waste, minimizes heat generation, and improves overall system efficiency. The pump has a volumetric efficiency of ≥92%.
High Power Density – The 74 cc displacement combined with 310 bar continuous pressure capability delivers exceptional power in a relatively compact package. The pump weighs approximately 26 kg.
Overload Protection – The pump's robust design and high peak pressure capability (400 bar) allow it to withstand shock loads and transient pressure spikes without damage, protecting the hydraulic system.
Low Noise Operation – The pump is engineered for quiet operation, with a noise level of ≤78 dB(A) at a 1-meter distance, contributing to a better working environment.
Application Sectors
The Danfoss FRR074 is a versatile pump widely used across numerous industries that require reliable and efficient hydraulic power. Its primary applications are in open-circuit hydraulic systems for mobile and industrial equipment.
| Industry Sector | Typical Applications |
|---|---|
| Construction Machinery | Excavators, wheel loaders, backhoe loaders, skid steer loaders, pavers, road rollers, compactors, trenchers, and concrete pump trucks. |
| Agricultural Equipment | Combine harvesters, forage harvesters, tractors, self-propelled sprayers, and other heavy agricultural machinery. |
| Material Handling | Forklifts, conveyor systems, stackers, and port machinery. |
| Industrial Systems | Injection molding machines, machine tools, hydraulic presses, and test rigs. |
| Mining & Energy Equipment | Mining machinery, crushers, and energy sector equipment. |
Performance Specifications (Model-Specific)
| Specification | Value |
|---|---|
| Manufacturer | Danfoss (Sauer-Danfoss) |
| Series | 45 Series, FRR (Frame F) |
| Model Code | FRR074BLS2520NNN3S1B2A1NNNNNNNNNN |
| Pump Type | Variable displacement axial piston pump |
| Circuit Type | Open circuit |
| Maximum Displacement | 74 cc/rev |
| Continuous Working Pressure | 310 bar (4,495 psi) |
| Peak Pressure | 400 bar (5,800 psi) |
| Continuous Speed Range | 500 – 2,400 rpm |
| Rated Speed | 2,400 rpm |
| Maximum Speed | 2,800 rpm |
| Theoretical Flow (at rated speed) | 178 L/min (46.9 US gal/min) |
| Weight | Approx. 26 kg (57.3 lbs) |
| Volumetric Efficiency | ≥92% (at rated conditions) |
| Noise Level | ≤78 dB(A) (at 1m distance) |
Conclusion
The Danfoss FRR074BLS2520NNN3S1B2A1NNNNNNNNNN is a high-performance, reliable, and efficient axial piston pump that embodies Danfoss's expertise in hydraulic technology. With its 74 cc displacement, variable displacement control, pressure rating of up to 400 bar, and load-sensing capabilities, it delivers precise, energy-efficient power for demanding open-circuit hydraulic systems.
Its defining features include a robust high-pressure design, advanced control options, high efficiency, and durable construction. These attributes make it an ideal solution for a wide range of heavy-duty applications — from construction machinery, agricultural equipment, and material handling systems to industrial machinery and mining equipment.
As a proven and versatile solution for open-circuit hydrostatic drives worldwide, the Danfoss FRR074 delivers consistent performance, precise control, and long-term dependability for equipment across numerous industries.
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