GPA2-10-E-20R6.3 Internal Gear Pump | GPA1 GPA2 GPA3 Series | Low Noise Hydraulic Pump

LIC Hydraulic’s GPA Series (including GPA1, GPA2, and GPA3) represents the cutting edge of high-pressure, low-noise internal gear pump technology. Specifically designed for industrial sectors requiring precision and quiet operation, the GPA2-10-E-20R6.3 offers 100% seamless interchangeability with global internal gear pump standards. By utilizing advanced axial and radial pressure compensation, these pumps deliver nearly pulse-free flow and exceptional volumetric efficiency. Each unit undergoes 100% simulated load testing to guarantee peak performance in high-pressure environments up to 250 bar.

Technical Specifications

• Full Model String: GPA2-10-E-20R6.3 / GPA2-16-E-20R6.3

• Displacement (GPA2-10): 10.0 cm³/rev

• Displacement (GPA2-16): 16.0 cm³/rev

• Rated Continuous Pressure: 250 bar (3625 psi)

• Max Operating Speed: 3600 rpm

• Min Operating Speed: 600 rpm

• Shaft Type: R6.3 (Standard Keyed Shaft)

• Mounting: E (European or Industry Standard)

• Volumetric Efficiency: $\ge 96\%$

• Noise Emission: $\le 65\text{ dB(A)}$ at full load

Key Technical Advantages

• Dual Pressure Compensation: Utilizing innovative axial and radial feedback systems, the pump automatically adjusts internal clearances to eliminate internal leakage, maintaining high efficiency throughout its service life.

• Ultra-Quiet Fluid Delivery: The internal gear engagement geometry ensures a high overlap coefficient, reducing fluid pulsation by over 50% compared to external gear pumps, resulting in a whisper-quiet factory environment.

• High-Pressure Integrity: Critical components are manufactured from high-grade nitrided steel, enabling continuous operation at 250 bar with excellent resistance to wear and pressure spikes.

• Compact & Robust Design: The minimal moving parts of the GPA series allow for a space-saving footprint and enhanced resistance to fine particle contamination compared to other high-pressure pump designs.

Application Areas

• CNC Machine Tools: Reliable power for hydraulic clamping, tool changers, and spindle auxiliary systems.

• Plastics Machinery: Secondary circuits for injection molding and blow-molding equipment.

• Aerospace Test Rigs: Ideal for simulation environments requiring low-ripple and high-response fluid output.

• Mobile Platforms: Precision lift circuits for electric reach trucks and scissor lifts.

Expert Maintenance Tips

• Mandatory Priming: Due to precision internal clearances, never run the pump dry. Fill the case through the outlet port and use “jog starting” to evacuate air before reaching full speed.

• Inlet Suction Integrity: Ensure the suction line is perfectly sealed and properly sized. Excessive vacuum will cause cavitation noise and catastrophic internal scoring.

• Temperature Control: Keep the hydraulic fluid within 30°C to 50°C. Excessive heat reduces oil viscosity, which can weaken the protective film between the internal gear teeth.