Shimadzu K1P Series Gear Pump | K1P1R11A K1P6R11A K1P10R11A | High Pressure Hydraulic Pump

The K1P Series axial-compensated high-pressure gear pumps from Chengyuan Hydraulic are precision power components fully compatible with Shimadzu industrial standards. Designed for high-frequency, heavy-duty cycles, this series features high-strength aluminum alloy bodies paired with precision-engineered gear sets. The K1P series (e.g., K1P4R11A, K1P10R11A) utilizes advanced side-plate pressure compensation technology to ensure exceptional volumetric efficiency at the 21MPa rated pressure. Every pump undergoes 100% simulated full-load condition testing before shipping to verify pressure output and thermal stability match OEM standards, guaranteeing 100% original-place interchangeability.

Technical Specifications:

• Core Model Range: K1P1, K1P2, K1P3, K1P4, K1P6, K1P7, K1P9, K1P10, K1P12

• Displacement: 1.0 mL/r to 12.0 mL/r (corresponding to model number)

• Rated Operating Pressure: 21 MPa (210 bar)

• Peak Pressure: 25 MPa (250 bar)

• Rated Speed Range: 500 – 4000 rpm (model dependent)

• Rotation: R (Clockwise) / L (Counter-Clockwise)

• Shaft Type: 11A (Standard SAE Keyed or Splined options)

• Mounting: Standard 2-bolt or 4-bolt Diamond Flange

Key Technical Advantages:

• Three-Piece High-Strength Aluminum Construction: The K1P series utilizes a specialized extruded aluminum alloy body, offering excellent heat dissipation and a superior power-to-weight ratio. This significantly reduces overall system weight compared to cast iron pumps.

• Advanced Side-Plate Pressure Compensation: Precise side-plate designs use hydraulic feedback to automatically adjust axial clearances. This ensures that volumetric efficiency remains above 92%, even after long-term wear during high-pressure operation.

• High-Performance DU Composite Bearings: Equipped with premium DU bushings that provide an ultra-low friction coefficient under high loads and boundary lubrication. Combined with precision-ground gear journals, this extends service life during high-frequency start-stop cycles.

• Optimized Relief Groove Design: The unique relief groove technology eliminates the “trapped oil” phenomenon during gear meshing, drastically reducing operating noise and vibration—critical for the comfort of equipment like forklifts.

Application Areas:

• Material Handling: Steering and lifting pumps for 1-3 ton electric or internal combustion forklifts.

• Compact Construction: Pilot control power sources for skid steer loaders and mini-excavators.

• Logistics Equipment: Hydraulic systems for tail lifts and electric pallet trucks.

Expert Maintenance Tips:

• Filtration Integrity: As a precision aluminum pump, the K1P is sensitive to hard particulates. We recommend a 100μm suction strainer and 10-25μm return filtration.

• Preventing Cavitation: Ensure the suction line is correctly sized and hermetically sealed. High-pitched screeching during operation usually indicates air ingestion or suction restriction.

• Initial Commissioning: After installation, run the pump without load for 5-10 minutes. Gradually apply pressure only after the air is fully purged and oil temperature has stabilized.