NIHON SPEED K1P Series Hydraulic Gear Pump Replacement | K1P2 K1P3 K1P4 K1P7 K1P10 K1P12 | 21MPa High Pressure

The NIHON SPEED K1P Series by Chengyuan Hydraulic is a high-performance external gear pump engineered for precision and durability. Specifically designed for Japanese machinery standards, this series provides 100% original-place interchangeability for models ranging from K1P2 to K1P12. Utilizing a high-strength extruded aluminum alloy body, our K1P pumps deliver consistent performance at pressures up to 21 MPa. At Chengyuan, every unit undergoes 100% simulated condition testing, ensuring that pressure responsiveness, noise reduction, and seal integrity meet the most rigorous global engineering standards.

Technical Specifications

• Core Models: K1P2, K1P3, K1P4, K1P7, K1P9, K1P10, K1P12 (R/L rotation)

• Displacement Range:

  • K1P2: $2.1\text{ cc/rev}$

  • K1P4: $4.0\text{ cc/rev}$

  • K1P7: $7.0\text{ cc/rev}$

  • K1P10: $10.5\text{ cc/rev}$

  • K1P12: $12.1\text{ cc/rev}$

• Rated Operating Pressure: $21\text{ MPa (210 bar / 3045 psi)}$

• Peak Operating Pressure: $25\text{ MPa (250 bar / 3625 psi)}$

• Maximum Speed: Up to $4000\text{ rpm}$

• Housing Material: High-tensile Extruded Aluminum Alloy

• Mounting: 11A Series Standard Flange & Shaft

• Efficiency: Volumetric Efficiency $\ge 92\%$

Key Technical Advantages

• Axial Gap Compensation: Features advanced floating side plates that use hydraulic pressure to minimize axial clearances. This ensures high volumetric efficiency even after thousands of hours of high-pressure operation.

• Precision-Ground Gears: Gears are crafted from high-alloy steel with precision grinding and heat treatment. This results in minimal flow ripple and exceptionally low noise levels during high-speed rotation.

• Lightweight & Robust Body: The specialized aluminum alloy body offers an excellent power-to-weight ratio, providing the structural rigidity needed for 21MPa while being ideal for AGVs and mobile power units.

• High-Pressure Shaft Seals: Equipped with premium reinforced shaft seals capable of withstanding pressure surges, ensuring zero external leakage and preventing air ingestion into the system.

Application Areas

• Forklifts & Material Handling: A staple for lifting and steering circuits in Japanese-brand forklifts.

• Mini Power Packs (HPU): Used in truck tail lifts, lift platforms, and compact hydraulic stations.

• Agricultural Equipment: Power assistance for harvesters, rice transplanters, and tractors.

• Robotics & AGV: Hydraulic actuation for automated logistics and mobile robots.

Expert Maintenance Tips

• Rotation Verification: Always verify the rotation direction (R for Clockwise, L for Counter-Clockwise) before installation. Incorrect rotation will cause immediate seal failure.

• Pre-Lubrication: Fill the pump with clean hydraulic oil through the inlet port before startup. Rotate the shaft by hand for several turns to ensure components are lubricated and air is purged.

• Filtration Standard: To protect the precision internal components, maintain system oil cleanliness at $10\text{–}20\mu\text{m}$ and monitor for any signs of fluid emulsification or aeration.