Kawasaki K3VG K3VL Hydraulic Pump | K3VL140 K3VG63 K3VL80 | Variable Piston Pump

The K3VG & K3VL Series variable displacement piston pumps from Chengyuan Hydraulic are high-performance units fully compatible with Kawasaki industrial and mobile standards. The K3VG series is designed for steady, high-pressure industrial open circuits, while the K3VL series (including K3VL140, K3VL80, K3VL45) is optimized for mobile machinery, offering high power density and versatile controls (Load Sensing, Torque Limiting, Pressure Comp). For models such as K3VG63-12NR and K3VL80/B-10RSM, we utilize reinforced alloy steel rotor components. Every pump undergoes 100% full-load condition testing to ensure peak volumetric efficiency at 320 Bar, guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Series Models: K3VG (Industrial) / K3VL (Mobile)

• Displacements: 45cc, 63cc, 80cc, 112cc, 140cc, 200cc

• Rated Pressure: 320 bar (32 MPa)

• Peak Pressure: 350 bar (35 MPa)

• Control Options: Load Sensing (LS), Pressure Cut-off (P0), Torque Limiting (L0/L1), Proportional Electric

• Max Speed: 1800 – 2700 rpm (depending on displacement)

• Housing Material: High-strength Ductile Iron for superior damping

• Shaft Ends: SAE Spline or Keyed options

• Weight: Range from 25kg (K3VL45) to 95kg (K3VL140)

Key Technical Advantages:

• Outstanding Power-to-Weight Ratio: The K3VL series features an optimized casting design that minimizes weight without sacrificing pulsation resistance, perfect for mobile applications with tight space constraints.

• Heavy-Duty Swashplate Bearings: Utilizing metal-to-metal spherical bearing technology, our design significantly enhances the swashplate’s load-carrying capacity during frequent displacement changes, preventing wear under high-frequency impact.

• Superior Self-Priming & Anti-Cavitation: Internal fluid galleries are optimized via CFD simulations combined with oversized suction ports. This ensures stable oil intake even in low temperatures or high-speed operations, preventing cavitation.

• Modular Control Valve Groups: The compensator blocks are modularly designed, allowing for rapid configuration for Load Sensing or Torque Control. The adjustment bolts offer high sensitivity for precise system tuning.

Application Areas:

• Construction Machinery: Excavator auxiliary systems, concrete pumps, and crane hydraulic circuits.

• Industrial Plants: Injection molding machines, presses, and steel mill hydraulic power units.

• Marine & Offshore: Steering gears, deck machinery, and winch drives.

Expert Maintenance Tips:

• Case Drain Pressure: Ensure case drain pressure remains below 1 bar. Excessive backpressure in the housing will lead to shaft seal failure and sluggish swashplate response.

• LS Signal Stability: When installing Load Sensing models (e.g., RSM control), ensure proper damping in the LS feedback line to eliminate system hunting or vibration caused by signal lag.

• Oil Quality Standards: Use premium mineral-based hydraulic oils (ISO VG32/46). Filtration must be maintained at NAS Class 8 or ISO 18/16/13 or better.