IGM Series Internal Gear Pump | IGM-5E-40-R IGM-4S-32-L IGM-5S-50-R IGM-6F

The IGM Series of high-pressure internal gear pumps manufactured by Chengyuan Hydraulic are premium fluid power components engineered to fully cross-reference the technical standards of CML (Camel Precision) Taiwan. Specifically optimized for modern electro-hydraulic servo energy-saving systems, injection molding machinery, and precision hydraulic press lines, this series is widely recognized for its ultra-low noise footprint, minimized pressure ripple, and exceptional volumetric efficiency. Focusing on the high-demand model designations provided—IGM-5E-40-R-20, IGM-4S-32-L-20, IGM-5S-50-R-20, and IGM-6F-125-R-20 (spanning DIN flanges, ISO standard flanges, and S-type secondary multiple pump links)—Chengyuan guarantees 100% original-place interchangeable plug-and-play compatibility. Every single unit undergoes 100% simulated loaded condition testing to verify mechanical reliability under continuous 250 bar loads and low-speed servo pressure-holding cycles.

Technical Specifications :

• Brand Compatibility: CML (Camel Precision) IGM Series Equivalent

• Target Model Nomenclature: IGM-5E-40-R-20, IGM-4S-32-L-20, IGM-5S-50-R-20, IGM-6F-125-R-20

• Displacement Class Parameters:

  • IGM-4S-32: 32 $cm^3/rev$ (S: Secondary multiple-stage pump interface)

  • IGM-5E-40: 40 $cm^3/rev$ (E: DIN standard flange execution)

  • IGM-5S-50: 50 $cm^3/rev$ (S: Secondary multiple-stage pump interface)

  • IGM-6F-125: 125 $cm^3/rev$ (F: ISO standard flange execution)

• Continuous Rated Pressure: 250 bar (25 MPa / M-Series high-pressure execution)

• Maximum Peak Pressure Limit: 300 bar (30 MPa)

• Continuous Operating Speed Range: 600 rpm – 2500 rpm (Optimized for dynamic servo driver adjustments)

• Minimum Operational Speed: 50 rpm (Achieves stable pressure holding up to 140 bar at low velocities)

• Direction of Rotation Options: R (Right-hand / Clockwise viewing from shaft end) / L (Left-hand / Counterclockwise viewing from shaft end)

• Fluid Media Requirements: Mineral-based anti-wear hydraulic oils per DIN 51524; Viscosity range: 10 to 300 $mm^2/s$

Key Technical Advantages:

• Hydrostatic Radial & Axial Pressure Compensation Matrix: The internal architecture features floating axial side plates and radial sealing crescent segments. These components are dynamically energized by the pump’s discharge pressure to automatically close operational running clearances. This mechanism keeps volumetric efficiency above 95% at continuous 250 bar loads, eliminating high-pressure slip and localized thermal oil thinning.

• Non-Symmetrical Dual-Involute Intermeshing Profile: The ring gear and pinion feature a highly sophisticated intermeshing curve profile. Smooth geometric transitions eliminate the trapped-oil pressure spikes common in external gear alternatives. This reduces pressure ripple to within $\pm 1\%$, successfully dampening system acoustic vibrations and pipeline harmonics.

• Whisper-Quiet Acoustic Footprint: Thanks to the uniform rolling contact of the internal gearing and sub-micron grinding tolerances, the noise emission at full flow and pressure is kept within a quiet range of 60-65 dB(A). This meets the most stringent environmental noise regulations in modern, human-centric production environments.

• Hydrodynamic Composite Journal Bearings: The drive shaft is fully supported by heavy-duty journal sleeves embedded with a multi-layer PTFE composite coating over a nitrided base. Under continuous rotation, a resilient hydrodynamic oil film isolates moving surfaces, allowing the pump to easily survive sharp servo velocity overloads and frequent start-stop duty cycles.

Application Areas:

• Servo Energy-Saving Injection Molding Equipment: Primary power units for plastic injection molding machines and rubber curing presses.

• Precision Metalforming Machine Tools: CNC hydraulic press brakes, heavy-duty industrial shearing machinery, and high-frequency hydraulic stamping presses.

• Multi-Circuit Centralized Power Packs: Tandem pump assemblies utilized via IGM-4S or IGM-5S rear modules to feed independent multi-axis automated lines.

Expert Maintenance Tips:

• Mandatory Pre-Lubrication and Manual Turn Prior to Initial Start: Internal gear pumps must never experience dry friction. Once the IGM pump is mounted, fill the housing completely with clean hydraulic oil through the inlet port and manually rotate the shaft by hand for 3-5 revolutions. This primes the internal compensation segments and journal bearings, preventing micro-seizure at startup.

• Enforce Rigorous Alignment Limits for Tandem Pump Configurations: When stacking an IGM-5S or IGM-4S as a secondary trailing pump, the concentricity alignment between the primary and secondary shafts must be rigidly maintained within 0.05 mm. Misalignment generates alternating radial shock forces on the shaft ends, triggering rapid shaft seal blowout or localized bearing failure.

• Guard the 60°C Temperature Boundary Under Servo Pressure-Holding: During zero-flow servo holding intervals, the pump may run as slow as 50 rpm under maximum pressure, severely reducing its natural fluid-cooling capacity. Keep reservoir temperatures below 60°C. For extended pressure-holding duty, program a micro-bleed or a dedicated off-line cooling loop to prevent internal face overheating.