Product Overview
The PRN-022/014R107SLP1F6F5NNF5F4NNNN is a high-performance aluminum-body fixed-displacement external gear pump from Danfoss’ PRN Series, configured as a Group 3 + Group 2 tandem (dual) pump. This design integrates two independent gear sections in a single housing, delivering two independent hydraulic outputs from a single drive shaft input.
The unit features a first-stage displacement of 22 cm³/rev (Group 3 housing) and a second-stage displacement of 14 cm³/rev (Group 2 housing), with a total combined displacement of 36 cm³/rev. The PRN Series belongs to the Danfoss GearMe® product line, featuring high-strength extruded aluminum bodies and pressure-balanced designs that deliver exceptional power density in a compact, lightweight package.
Key Interchangeability Advantage: Our PRN series tandem gear pumps are manufactured to strict Danfoss (formerly Sauer-Danfoss/Turolla) original design specifications, ensuring 100% direct interchangeability with original units. All mounting interfaces, flange dimensions, shaft configurations, and port positions are identical to the original product—no modifications required. Every pump undergoes 100% factory performance testing under simulated operating conditions (covering rated pressure, peak pressure, and full speed range performance curves for each pump stage), guaranteeing plug-and-play reliability with zero performance deviation.
Model Code Breakdown (based on Danfoss PRN Series designation rules):
Series: PRN = Tandem Gear Pump (Group 3 + Group 2)
Stage I Displacement: 022 = 22.0 cm³/rev
Stage II Displacement: 014 = 14.0 cm³/rev
Rotation: R = Clockwise (viewed from drive shaft end)
Flange/Shaft/Port Code: 107SLP1F6F5NNF5F4NNNN = Specific flange, shaft, port, and cover configuration
Technical Specifications
PRN-022/014R107SLP1F6F5NNF5F4NNNN
Product Series: PRN Series Tandem External Gear Pump
Pump Type: Tandem Gear Pump, Group 3 + Group 2 configuration
Stage I Displacement: 22.0 cm³/rev (Group 3 housing)
Stage II Displacement: 14.0 cm³/rev (Group 2 housing)
Total Combined Displacement: 36.0 cm³/rev
Rated Continuous Operating Pressure: Up to 250 bar
Series Peak Pressure: Up to 280 bar
Maximum Speed: Up to 3000 rpm
Gear Type: External gear, pressure-balanced design
Body Material: High-strength extruded aluminum
Seals: Standard NBR (Nitrile Butadiene Rubber)
Mounting Flange: SAE standard
Drive Shaft: Splined shaft (configuration-dependent)
Port Connections: SAE O-Ring Boss flanged ports
Operating Temperature Range: -20°C to +80°C
Recommended Fluid Viscosity: 10 – 800 cSt
Filtration Requirement: ISO 4406 cleanliness class 18/17/14 or better
Weight: Approx. 5.5 – 7.0 kg (configuration-dependent)
Key Technical Advantages
1. Tandem Integrated Design for Two Independent Outputs
The PRN Series integrates Group 3 and Group 2 gear sections in a single housing, delivering two independent hydraulic outputs from a single drive shaft input. This design dramatically simplifies piping layout in complex hydraulic systems, reduces external connection points and leakage risks, and saves valuable installation space.
2. High-Strength Extruded Aluminum Body for Lightweight High Power Density
The series features high-strength extruded aluminum bodies with Teflon-coated bushings, extending service life under extreme temperatures and pressures. The lightweight design significantly reduces overall pump weight—particularly critical for mobile equipment applications with strict weight constraints.
3. Pressure-Balanced Design with Optimized Flow Metering for High Efficiency and Low Noise
The pressure-balanced design ensures automatic hydraulic clearance compensation between gears and housing under all operating conditions, significantly improving volumetric efficiency and minimizing internal leakage. Optimized flow metering reduces pressure pulsation, delivering noise levels approximately 10dB(A) lower than standard gear pumps—substantially improving operator working conditions.
4. Flexible Mounting Configurations and Multi-Pump Combination Capability
Supports SAE, ISO, and DIN mounting flange and drive shaft standards. PRN series tandem pumps can be flexibly combined with Group 1, 2, and 3 series pumps to form multi-stage pump assemblies, offering exceptional design flexibility for complex hydraulic systems.
5. Wide Displacement Coverage for Precise System Matching
Group 2 housing offers 9 displacement options (4.0 – 25.2 cm³/rev), with Group 3 covering an even broader range. The extensive selection ensures optimal matching for any flow requirement.
Application Areas
Combine Harvesters: Rostselmash VECTOR 450 and similar large combine hydraulic systems
Construction Equipment: Medium excavators, loaders with multi-circuit hydraulic systems
Agricultural Machinery: Large tractors, seeders with multi-function hydraulic control
Material Handling Equipment: Heavy-duty forklifts, telehandlers
Vocational & Municipal Equipment: Sanitation vehicles, concrete mixer trucks, specialty utility vehicles
Industrial Hydraulic Systems: Multi-actuator automation systems
Expert Maintenance Tips
1. Pre-Installation Checks
Verify pump rotation direction is clockwise (R) (viewed from the drive shaft end) matches system requirements. Reverse rotation will damage the shaft seal and prevent pressure build-up.
Check drive spline shaft and coupling fit precision—never use hammer-driven installation; always use proper pressing tools.
Ensure port specifications for each pump stage precisely match hydraulic fittings to prevent improper installation and leakage.
2. First Start-Up & Oil Priming
Prime the pump housing with clean hydraulic oil before first start-up; ensure all suction lines are fully filled—never run dry.
Recommended hydraulic fluid: anti-wear hydraulic oil per DIN 51524 (HLP grade), ISO VG 32–46 viscosity.
Each suction port of the tandem pump must maintain adequate inlet pressure (typically no less than 0.8 bar absolute).
3. Filtration & Fluid Cleanliness
System filtration should meet ISO 4406 cleanliness class 18/17/14 or better.
Regularly monitor fluid cleanliness to prevent contaminants from accelerating bearing and gear wear.
Maintain operating oil temperature within -20°C to +80°C.
4. Tandem Pump Torque Limitation
Total drive torque is the sum of all pump stage torques. Ensure prime mover output torque meets: Δp₁ × Vg₁ + Δp₂ × Vg₂ ≤ M_max.
System design must ensure the sum of pressure × displacement products across all stages does not exceed the maximum allowable drive shaft torque.
5. Operating Monitoring & Maintenance
If abnormal noise or pressure fluctuation occurs, first check for air ingestion in the system (inspect all suction line seals).
Regularly check torque on pump and piping connection bolts to prevent loosening from vibration.
Recommended comprehensive inspection every 1000 operating hours or 6 months.
