DANFOSS piston pump KRR/KRL, JRR/JRL, FRR/FRL series

The following are the specifications and related information of DANFOSS piston pumps KRR/KRL, JRR/JRL, FRR/FRL series：
KRR/KRL series
Main models: KRL045DPC21NNN3C2NFA, KRR030, KRR038, KRR045, etc.
Displacement range: covering 30-45cc/r (some models may be larger).
Maximum working pressure: 30Mpa (about 300 bar), and the peak pressure of some models can reach 35MPa.
Flow range: Depending on the model and speed, it can meet different flow requirements.
Speed range: 700-2,400 rpm, good compatibility at low speeds.
Drive mode: Support motor or engine drive, adapt to 220V/280V voltage.
Sealing material: NBR/FKM, temperature resistance range -20℃~90℃.
Control method: KRR is a quantitative pump, KRL is a variable pump, integrated pressure compensator, and the flow rate can be automatically adjusted according to system requirements.
Typical applications: industrial hydraulic stations, injection molding machines, marine equipment, etc.
JRR/JRL series
Main models: JRL060BLS, JRR045C, JRRS60, JRRS75, JRLS75, etc.
Displacement range: 40-250cc/r, covering the needs of small and medium displacement.
Maximum working pressure: 40MPa (about 400 bar), strong impact resistance, suitable for heavy-duty working conditions.
Flow range: 280-1,025 m3/h, high-flow models are suitable for large-scale equipment.
Speed: Stable operation speed can reach 3,360 RPM.
Control method: Support electric proportional valve or pilot oil circuit control, some models have load-sensitive control function.
Typical applications: construction machinery (excavators, cranes), agricultural machinery, etc.
FRR/FRL series
Main models: FRR074BLS, FRR090CLS, FRL090CLS, FRL44-350-EM-A-20, etc.
Displacement range: 30-250cc/r, to meet different flow requirements.
Maximum working pressure: The FRR series supports higher pressure (400+bar), and FRL is suitable for medium and high pressure (300-400 bar).
Flow rate: 100 m3/h (some models are higher), suitable for agricultural machinery and material handling systems.
Weight: 50-88 kg, aluminum shell design, lightweight and compact structure.
Temperature range: -20℃~90℃, wide temperature range adaptability.
Control method：
Constant pressure control (HD): A system that requires stable pressure (such as a hydraulic station).
Electro-hydraulic ratio (EM): Scenarios where remote pressure regulation or precise flow control is required.
Load sensitive (LS): Suitable for scenarios where the flow rate of construction machinery walking systems changes with the load.
Port configuration: SAE flange port (20 series) is suitable for pipe connection, and threaded port (30 series) saves space.
Typical applications: agricultural machinery, material handling systems, mining machinery, heavy stamping equipment, etc.