IGP3-005-L11/10 Duplomatic Internal Gear Pump 5.2cc 330bar

Product Overview

The IGP3-005-L11/10 is a high-pressure internal gear pump from the Duplomatic IGP3 series, size 005, with a nominal displacement of 5.2 cm³/rev. It is a fixed displacement pump. The IGP3 series covers a displacement range of 3.6 to 10.2 cm³/rev, including sizes 003, 005, 006, 008, and 010 — the most compact specification group in the IGP series. The pump features an internal gear design with axial and radial bidirectional gap pressure compensation, maintaining high volumetric efficiency even at low speeds and low viscosities, with low noise, long service life, and high contamination tolerance.

In the model designation IGP3-005-L11/10, “L” indicates counter-clockwise rotation (viewed from the shaft end), “11” is the series code (Series 11), and “10” is the design code. The pump directly replaces same-specification Duplomatic IGP3 series pumps. The mounting flange complies with SAE J744 – ISO 3019-1, and ports are SAE J518 Code 61 flange connections, enabling true drop-in interchangeability. Every unit undergoes 100% simulated operating condition testing before shipment, covering rated pressure loading, volumetric efficiency verification, and housing sealing integrity.

Technical Specifications 

• Model: IGP3-005-L11/10

• Series: IGP3 Series (Series 11)

• Pump Type: Internal gear pump, fixed displacement, with axial and radial gap pressure compensation

• Nominal Displacement: 5.2 cm³/rev

• Maximum Displacement Range (IGP3 Series): 3.6 – 10.2 cm³/rev

• Continuous Working Pressure: 280 bar

• Maximum Working Pressure: 330 bar

• Minimum Speed: 400 rpm

• Maximum Speed: 3,600 rpm

• Theoretical Flow at 1500 rpm: 7.8 L/min

• Rotation Direction: Counter-clockwise (L = counter-clockwise, viewed from shaft end)

• Mounting Flange: SAE 2-hole flange, SAE J744 – ISO 3019-1

• Port Connection: SAE J518 Code 61 flange connection

• Housing Material: High-strength cast iron

• Weight (single pump, IGP3 series): Approx. 4 – 4.8 kg

• Front Shaft Seal Material: Viton (FKM)

• Recommended Fluid Viscosity: 25 – 100 cSt

• Fluid Temperature Range: -20 °C to +80 °C

• Ambient Temperature Range: -20 °C to +60 °C

Key Technical Advantages

1. Axial and Radial Bidirectional Gap Pressure Compensation: The IGP3-005-L11/10’s core technical advantage is its bidirectional gap compensation system. Axially, pressure fields behind the front and rear side plates balance against the displacement chamber pressure, creating a perfect seal with minimal mechanical losses. Radially, the crescent side plate and main plate achieve automatic clearance adjustment via a plastic locating rod. This design maintains high volumetric efficiency even at low speeds (400 rpm) and low viscosities, overcoming the limitations of conventional gear pumps.

2. Ultra-Low Noise Operation: The IGP3 series internal gear pump features a special tooth profile with a long meshing length that effectively reduces flow and pressure pulsation. Even at 3,600 rpm, noise levels remain low, with a sound pressure level of approximately 53 dB(A) measured at 1 m axial distance from the pump. This makes it particularly suitable for machine tools, precision equipment, and applications with strict noise requirements.

3. High Contamination Tolerance and Long Service Life: The IGP3 series is insensitive to oil cleanliness with strong anti-contamination capability. Optimized load distribution and special wear-resistant bearings enable continuous duty at high pressures, significantly extending service life. The critical running surfaces formed by the front and rear side plates (axial compensation) and crescent side plate and main plate (radial compensation) are hardened for superior wear resistance.

4. Compact Lightweight Construction: The IGP3 series single pump weighs only 4 – 4.8 kg, making it the lightest specification group in the entire IGP series. The compact structure saves installation space and facilitates easy installation and maintenance in small hydraulic systems or space-constrained equipment. The wide speed range (400 – 3,600 rpm) adapts to various drive conditions.

5. Multi-Pump Combination Flexibility: IGP series pumps can be combined to form multi-flow groups suitable for multi-circuit hydraulic systems. The IGP3 series can be combined with larger IGP4, IGP5, and other pumps, enabling flexible configuration according to system requirements while reducing piping connections and installation space.

Application Areas

• Machine Tools: CNC machine tools, machining centers, grinding machines — hydraulic power units

• Precision Injection Molding: Small injection molding machines, precision injection molding equipment

• Test Equipment: Hydraulic test stands, material testing machine hydraulic power sources

• Construction Machinery: Small loaders, skid steer loaders — auxiliary hydraulic systems

• Agricultural Machinery: Tractor auxiliary hydraulic systems, harvester hydraulic control circuits

• Food Packaging Machinery: Food packaging machinery, pharmaceutical equipment hydraulic drives

• Marine Hydraulics: Small marine hydraulic steering gear, deck machinery

• Industrial Automation: Various industrial equipment requiring low-noise, high-pressure hydraulic power

Expert Maintenance Tips

1. Shaft Alignment and Flange Connection: Concentricity deviation between the pump and drive shaft must be less than 0.05 mm, with angular deviation less than 0.25°. The IGP3 series uses an SAE 2-hole flange (SAE J744 – ISO 3019-1) with SAE J518 Code 61 flange port connections. Tighten flange bolts in diagonal sequence for even loading.

2. Initial Start-Up Filling and Bleeding: Pre-fill the pump housing with clean hydraulic fluid through the drain port before installation. Start at the lowest speed of 400 rpm and observe a steady oil flow from the case drain port free of bubbles. Once bleeding is complete, gradually increase to working pressure. Note that the minimum speed for the IGP3 series is 400 rpm.

3. Rotation Direction Verification: The IGP3-005-L11/10 is counter-clockwise (L) rotation as viewed from the drive shaft end. Driving it clockwise is strictly prohibited — incorrect drive direction will reverse the suction and pressure sides, causing severe gear and bearing wear within a short period.

4. Fluid Cleanliness and Viscosity Management: Use L-HM 32/46 anti-wear hydraulic oil with a viscosity range of 25 – 100 cSt and fluid temperature of -20 °C to +80 °C. Although the IGP3 series has strong contamination tolerance, maintaining fluid cleanliness remains critical for extended pump life. Replace hydraulic fluid and filter elements every 1,000 operating hours or annually.

5. Gap Compensation System Inspection: Axial and radial gap compensation is the core technology of this pump. During maintenance, inspect the front and rear side plates (axial compensation) and the crescent side plate and main plate (radial compensation) for wear. The plastic locating rod is a critical component of the radial compensation — replace if worn or deformed.

6. Extended Shutdown Protection: For equipment idle longer than 30 days, start the pump once per month and run unloaded for 10 minutes to prevent oil film breakdown on gear meshing surfaces.