KP30.34 KP30.51 Double Gear Pump | Cast Iron Hydraulic Pump | D Series High Pressure

The KP30 Series from LIC Hydraulic is a premier Heavy-Duty Cast Iron Gear Pump designed for the most demanding machinery applications. Unlike aluminum counterparts, the KP30 range features a robust high-tensile iron housing that offers superior thermal and geometric stability under extreme pressure. Models like KP30.51-05S3/30.34 D are sophisticated double-pump units that provide independent flows for multi-circuit systems from a single drive shaft. We offer 100% drop-in replacements, matching original technical specifications for all mounting flanges, shafts, and porting configurations.

Technical Highlights

• Material: High-tensile gray cast iron construction.

• Max Pressure: Continuous duty up to $250\text{ bar}$ ($3625\text{ psi}$), Peak up to $280\text{ bar}$.

• Support: Heavy-duty alloy bushing design for maximum radial load capacity.

• Mounting: Compatible with standard SAE and specialized European machinery interfaces.

Core Advantages

• Extreme Durability: The cast iron body prevents the internal “scoring” and fatigue cracks often found in lighter pumps during high-frequency pressure spikes, making it the industry standard for demolition and mining equipment.

• Optimized Volumetric Efficiency: Pressure-compensated side plates maintain a tight seal across a wide temperature range, ensuring your loader or excavator maintains its speed and power throughout a full shift.

• Contamination Resilience: Engineered with specialized bushings that thrive in environments where fluid cleanliness may be difficult to maintain, providing a reliable alternative to delicate piston pumps.

• Compact Power Source: By integrating two independent displacement sections (e.g., $51\text{ cc}$ and $34\text{ cc}$) into a single D-series unit, you save significant space in the engine compartment while reducing the number of external drive connections.

Expert Maintenance Tips

• Case Priming: Before initial startup, fill the pump intake with clean hydraulic oil. The heavy-duty bushings rely on an immediate oil film to prevent heat-related seizure during the first few seconds of operation.

• Bolt Torque: When mounting the KP30 series, use Grade 10.9 or 12.9 bolts. The weight and vibration of a cast iron pump require secure, evenly torqued mounting to prevent shaft misalignment.

• Fluid Selection: To maximize the life of the iron-on-alloy internal surfaces, use high-quality mineral-based hydraulic oils with anti-wear (AW) additives, maintaining a cleanliness level of ISO 18/16/13.