SNP1 SNP2 SNP3 SNW Series Hydraulic Gear Pump | Danfoss Group 1 2 3 Replacement

The SNP and SNW Series Hydraulic Gear Pumps from Chengyuan Hydraulic represent the pinnacle of LSHT (Low Speed High Torque) and high-speed fluid power technology. Built as a precision alternative to Sauer-Danfoss (Danfoss) specifications, these Group 1, 2, and 3 pumps (including SNP1NN, SNP2NN, and multi-stage SNW units) offer 100% original-place interchangeability. Our manufacturing process focuses on technical authenticity, with every unit undergoing 100% simulated condition testing to guarantee that pressure, flow, and efficiency metrics meet or exceed OEM standards.

Technical Specifications (Bulleted List)

• Model Series: SNP1NN, SNP2NN, SNP3NN, SNW2NN

• Displacements: $2.6\text{ cc}, 4.3\text{ cc}, 8.0\text{ cc}$ (as per SNP1/SNP2/SNW specifications)

• Rated Pressure: $25\text{ MPa (3625 psi)}$

• Peak Pressure: $28\text{ MPa (4060 psi)}$

• Max Speed: $3000\text{–}4000\text{ RPM}$ depending on frame size

• Rotation: R (Clockwise) or L (Counter-clockwise)

• Shaft Types: Splined, Parallel Keyed, or Tapered (e.g., BAP1 code)

• Body Material: High-tensile Extruded Aluminum with Cast Iron Covers

• Valving: Fixed Displacement

Key Technical Advantages

• Three-Piece High-Strength Design: Constructed with a heavy-duty extruded aluminum body and cast iron end covers, ensuring minimal housing expansion under high-pressure cycles of up to $280\text{ bar}$.

• Pressure-Balanced Side Plates: Featuring floating bushings and axial pressure compensation technology, the pump automatically adjusts clearances based on load. This maximizes Volumetric Efficiency even during low-speed operations.

• DU Self-Lubricating Bushings: Equipped with high-capacity DU bearings, providing stable radial support for the gear sets, which minimizes vibration and ensures a Low-Noise Design.

• Modular Multi-Stage Capability: Our SNP/SNW series supports complex tandem configurations (e.g., SNW2NN+SNP2NN), allowing independent pressure control for different machine functions without hydraulic interference.

Application Areas

• Mobile Machinery: Grass cutters, mini-excavators, and skid steer loader steering circuits.

• Material Handling: Main lift and steering pumps for forklifts and reach stackers.

• Industrial Units: Power packs for plastic injection molding and CNC machine cooling systems.

Expert Maintenance Tips

• Pre-Start Priming: For SNW/SNP multi-stage pumps, ensure all pump sections and suction lines are fully primed with filtered hydraulic oil. Avoid “dry starts” at all costs.

• Filtration Standards: Danfoss-series pumps are sensitive to particulate contamination. Maintain filtration at $\text{ISO 4406 18/16/13}$ (better than $20\text{ }\mu\text{m}$).

• Shaft Alignment: Ensure precise alignment with the drive coupling. Never use a hammer for installation, as axial impact can damage the internal pressure-compensation plates.