Product Overview
The SNP2NN-019LN06SAP1F5F4NNNN/NNNNN, along with the SNP1NN, SKP1NN, and SKP2NN series, are high-performance fixed-displacement aluminum external gear pumps from the Danfoss GearMe product line (formerly the Turolla series).
The SNP2NN belongs to Group 2 (medium frame) with displacements ranging from 3.9 to 25.2 cc/rev. This series is renowned for its high efficiency, reliability, and compact design, featuring a high-strength aluminum housing that delivers excellent heat dissipation and significant weight reduction. The SNP2NN series supports a wide range of configurations including SAE A and SAE B mounting flanges, splined/straight/tapered shafts, and BSPP/UNF/SAE flange port options.
The SNP1NN and SKP1NN belong to Group 1 (small frame), ideal for low-flow, high-precision applications. The SKP1NN features a larger diameter shaft design, enabling higher pressure capability at equivalent displacements.
Interchangeability: The SNP/SKP series is manufactured to exacting Danfoss original design standards. Mounting flange, shaft type, port dimensions, and rotation direction are fully compliant with genuine Danfoss/Turolla specifications, enabling 100% drop-in replacement without any system modification.
Technical Specifications
SNP2NN-019LN06SAP1F5F4NNNN/NNNNN
Brand: Danfoss (Denmark)
Series: SNP2NN (GearMe product line, formerly Turolla)
Group: Group 2 (medium frame)
Displacement: 19.2 cc/rev
Continuous (rated) pressure: 210 bar
Peak (intermittent) pressure: 230 bar
Maximum speed: 3,000 rpm
Maximum flow rate: 57.6 L/min
Rotation: L = Counter-clockwise (left-hand)
Mounting flange: 06 = SAE A flange, pilot Ø82.55 mm, 2-bolt
Shaft type: SA = SAE J498 9T 16/32 DP splined shaft
Inlet port: F5 = 3/4″ BSPP threaded
Outlet port: F4 = 1/2″ BSPP threaded
Rear cover: P1 = Standard cover
Seals: N = Standard NBR
Valve configuration: NNN = No valve
Net weight: Approx. 3.1 kg
Housing material: High-strength aluminum alloy
Volumetric efficiency: ≥ 94%
Overall efficiency: 85% – 92%
Operating temperature range: -20°C to +80°C
Recommended fluid viscosity: 10 – 800 cSt
SNP1NN Series (Group 1)
Brand: Danfoss (Denmark)
Series: SNP1NN
Group: Group 1 (small frame)
Displacement range: 1.57 – 12 cc/rev
Rated pressure: 250 bar
Peak pressure: 270 bar
Maximum speed: 4,000 rpm
Housing material: Aluminum alloy
Typical models: SNP1NN/1.7R, SNP1NN/7.8RN01DA
SKP1NN Series (Group 1 Heavy-Duty)
Brand: Danfoss (Denmark)
Series: SKP1NN
Group: Group 1 (small frame)
Displacement: 3.14 – 3.8 cc/rev
Rated pressure: 250 bar
Peak pressure: 270 bar
Maximum speed: 4,000 rpm
Shaft feature: Larger diameter shaft for higher pressure capability
Housing material: Aluminum alloy
Typical model: SKP1NN/3.2R
Key Technical Advantages
1. High-Strength Aluminum Housing with Superior Heat Dissipation
The high-strength aluminum housing delivers exceptional structural integrity while significantly reducing pump weight. The aluminum material offers excellent thermal conductivity, rapidly dissipating operating heat to effectively lower fluid operating temperatures and extend overall hydraulic system life.
2. High Volumetric and Overall Efficiency
The SNP2NN series achieves volumetric efficiency (ηv) of ≥ 94% and overall efficiency (ηt) of 85% – 92%. Precision-machined gears with minimized clearance effectively reduce internal leakage, ensuring stable flow output across the full operating pressure range.
3. Modular Design with Extensive Configuration Options
The SNP/SKP series features a modular design offering 9 displacement options, multiple flange types (SAE A / SAE B / European standard), various shaft types (splined/straight/tapered), and multiple port configurations (BSPP / UNF / SAE flange). This exceptional configuration flexibility enables adaptation to the vast majority of industrial and mobile hydraulic system installation requirements.
4. Flexible Multi-Pump Configurations
Supports multi-pump combinations across SNP1NN, SNP2NN, and SNP3NN series. Tandem configurations enable multiple flow outputs to meet diverse flow and pressure requirements of complex hydraulic systems without the need for additional drive sources.
5. Wide Speed and Pressure Operating Range
Smaller displacement SNP2NN models (04-014) achieve maximum speeds up to 4,000 rpm with rated pressure of 250 bar and peak pressure of 280 bar. Larger displacement models (019-025) maintain 3,000 rpm maximum speed capability. The wide speed range enables flexible adaptation to various drive speed applications.
6. Compact Design and Lightweight Construction
SNP2NN Group 2 pumps weigh only 2.3 – 3.3 kg, while SNP1NN Group 1 pumps weigh approximately 1.05 kg. The compact dimensions and lightweight design make these pumps particularly suitable for mobile hydraulic equipment with strict space and weight constraints.
Application Areas
Construction Machinery – Excavators, loaders, bulldozers, and other mobile equipment hydraulic systems
Agricultural Machinery – Tractors, combine harvesters, sprayers, and other agricultural equipment
Material Handling Equipment – Forklifts, lifting platforms, stackers, and other handling machinery
Industrial Hydraulic Systems – Machine tools, packaging machinery, automated production lines, and other stationary industrial equipment
Mobile Hydraulic Equipment – Aerial work platforms, municipal vehicles, specialty vehicles
Wind Power – Pitch and yaw hydraulic control systems for wind turbine generators
Marine & Offshore Engineering – Marine deck machinery and hydraulic systems
Expert Maintenance Tips
1. Fluid Cleanliness Management
SNP/SKP series aluminum gear pumps are sensitive to fluid contamination. Recommended fluid cleanliness: ISO 4406 18/16/13 (NAS 1638 Class 9) or higher. Install a suction filter with minimum 100 μm filtration and a return line filter with 10 μm filtration.
2. Fluid Viscosity & Temperature Control
Mineral-based hydraulic oils conforming to ISO/DIN standards are recommended. Operating viscosity should be maintained within 10 – 800 cSt. Optimal operating temperature: 40 – 60°C, with allowable range of -20°C to +80°C. For cold starts, ensure fluid temperature is above -10°C to prevent cavitation due to excessive viscosity. For sustained high-temperature operation, a cooler is recommended.
3. Rotation Direction Verification
Always verify the pump rotation direction indicator before start-up (SNP2NN standard configurations include R = right-hand/clockwise and L = left-hand/counter-clockwise options). Start with jog operation to confirm correct rotation, then gradually load to operating pressure.
4. Alignment During Installation
Ensure concentricity between pump shaft and drive motor shaft does not exceed 0.05 mm, with angular misalignment within 0.5°. Flexible couplings are recommended to compensate for minor misalignment. When installing the coupling, avoid applying axial force and never use a hammer. SAE flange installation requires proper bolt torque according to specifications.
5. First Start-Up and Bleeding
Before initial start-up, pre-lubricate the pump by filling clean hydraulic oil through the housing ports. After start-up, run the pump in no-load operation for a few seconds to ensure sufficient lubrication. The pump must be bled before building up system pressure. Never allow the pump to run without oil. If the pumped oil still contains bubbles after approximately 20 seconds, inspect the suction line for leaks.
6. Periodic Maintenance
Replace hydraulic oil and filters every 2,000 operating hours or annually. Regularly monitor pump body temperature (surface temperature should not exceed 80°C) and listen for abnormal noise increases, which may indicate internal wear or cavitation. When servicing aluminum housing pumps, take extra care to avoid damaging sealing surfaces during disassembly.
