Sumitomo IGH Series Internal Gear Pump | IGH-2E IGH-3E IGH-4E IGH-5E IGH-6E | High Pressure

The IGH Series high-pressure internal gear pumps from Chengyuan Hydraulic are premium power components fully compatible with Sumitomo industrial standards. Engineered for injection molding machines, press brakes, and precision hydraulic stations, the IGH series excels in high-pressure environments (up to $30\text{ MPa}$) while maintaining ultra-low noise levels (typically below $65\text{ dB}$). As a precision-grade product from Chengyuan, every IGH pump undergoes 100% simulated condition testing to ensure minimal pressure ripple, making it the ideal choice for servo-hydraulic systems. We guarantee 100% original-place interchangeability.

Technical Specifications:

• Model Codes: IGH-2E-5-R-20, IGH-5E-50-R-20, IGH-5L-64-R-20, IGH-5F-40-R-20

• Displacement Range: $3.5\text{ cm}^3/\text{rev}$ to $125\text{ cm}^3/\text{rev}$ (Across series 2E through 6E)

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

• Peak Pressure: $30\text{ MPa (300 bar)}$

• Maximum Speed: $2000\text{–}3000\text{ rpm}$

• Volumetric Efficiency: $\ge 95\%$ under high pressure

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

• Inlet/Outlet Connection: Flange connection (SAE or standard compliant)

Key Technical Advantages:

• Dual Automatic Pressure Compensation: The IGH series incorporates advanced axial balance plates and radial sealing blocks. As pressure increases, these components automatically seal internal clearances, ensuring stable, ultra-high volumetric efficiency and minimal leakage throughout the pump’s service life.

• Ultra-Low Noise & Ripple: The high contact ratio of internal gears provides smooth flow output. Its unique “smooth unloading groove” design eliminates oil trapping and noise, resulting in operation far quieter than external gear or piston pumps, significantly improving the workshop environment.

• Excellent Servo Compatibility: Low rotational inertia and rapid response make the IGH pump ideal for use with servo motors. It maintains high control precision and energy efficiency during the frequent start-stop and high-low pressure cycles typical of servo-driven systems.

• Advanced Sleeve Bearing Technology: Features high-load sleeve bearings lubricated by pressurized oil for superior vibration damping. The pump body is constructed from high-strength ductile iron for exceptional fatigue resistance.

Application Areas:

• Injection Molding: Primary power source for precision servo injection molding machines.

• Sheet Metal Machinery: CNC press brakes and precision shearing machines.

• Industrial Machine Tools: Hydraulic servo systems for grinders and machining centers.

Expert Maintenance Tips:

• Strict Rotation Control: The IGH series is unidirectional. Verify motor rotation before installation; reverse rotation will cause catastrophic damage to the internal sealing blocks and compensation plates within seconds.

• Venting Procedure: Before the first run or after changing filters, bleed all air from the pump and pipelines at no-load. Residual air leads to cavitation noise and damages gear surfaces.

• Fluid Cleanliness: To protect the high-precision compensation plates, system filtration must be maintained at $10\mu\text{m}$ (ISO 4406 18/16/13) or better.