Nihon Speed K1P Series Gear Pump | K1P1R11A K1P3R11A K1P6R11A K1P9R11A | High Pressure

The K1P Series axial-compensated high-pressure gear pumps from Chengyuan Hydraulic are micro-power components fully compatible with Nihon Speed industrial standards. Designed for compact hydraulic systems, the K1P series features high-strength aluminum alloy housings and precision-ground gear sets, delivering exceptional volumetric efficiency even at 21 MPa. As a core miniature pump line from Chengyuan, every K1P unit undergoes 100% simulated condition testing. Its flow characteristics and mounting specifications (R11A standard) are fully aligned with OEM standards, making it the ideal choice for Micro Hydraulic Power Unit (HPU) upgrades and replacements.

Technical Specifications :

• Core Model Series: K1P1, K1P2, K1P3, K1P4, K1P6, K1P7, K1P9, K1P10

• Displacement Range: $1.0\text{ cm}^3/\text{rev}$ to $10.5\text{ cm}^3/\text{rev}$

• Nominal Pressure: $21\text{ MPa (210 bar)}$

• Peak Pressure: $25\text{ MPa (250 bar)}$

• Allowable Speed Range: $500\text{–}4000\text{ rpm}$

• Mounting Interface: R11A (Nihon Speed standard rhombic flange)

• Rotation: R (Right-hand / Clockwise from shaft end)

• Operating Temperature: $-15\text{°C}$ to $+80\text{°C}$

• Shaft Ends: 1:8 Tapered or Spline options

Key Technical Advantages:

• Axial Pressure Compensation: Incorporates flexible side-plate compensation that uses discharge pressure to seal gear end-faces. This ensures up to 95% volumetric efficiency across the pressure range, minimizing internal leakage caused by temperature rise.

• High-Strength Aluminum Body: The body is extruded from specialized high-density aluminum alloy, offering excellent heat dissipation and the ability to withstand high pressure pulsations without deformation, significantly reducing weight for mobile applications.

• Ultra-Precision Gear Sets: Gears are made from premium alloy steel with vacuum quenching, precision-ground to micron tolerances. This ensures extremely low noise levels and smooth flow output even at high speeds (up to $4000\text{ rpm}$).

• Dual Shaft Seal Protection: Specifically reinforced for use in micro power units, the front shaft seal design prevents air ingestion and withstands system backpressure, drastically extending the maintenance-free service life.

Application Areas:

• Material Handling: Electric pallet trucks and hydraulic lift systems for small stackers.

• Mobile Machinery: Tailgate lifts, hydraulic jacks, and auxiliary circuits for mini-excavators.

• Micro Power Units (HPU): Medical bed adjustments and clamping devices in small automated production lines.

Expert Maintenance Tips:

• Rotation Verification: The “R” in the model code denotes right-hand rotation. Do not operate in reverse; this will cause immediate shaft seal failure and internal damage.

• Suction Filtration: Due to the extremely tight internal clearances, a $25\mu\text{m}$ suction strainer and $10\mu\text{m}$ return filter are highly recommended to prevent particulate seize-up.

• Pre-Priming: Fill the suction port with clean hydraulic oil before the initial startup. For high-speed operations, maintain oil temperature between $30\text{–}50\text{°C}$ for optimal viscosity protection.