Product Overview
The PGI102-2-0061RK03-11-6100, along with the PGI100, PGI101, PGI102, and PGI103 series, are high-performance internal gear pumps from the German manufacturer HYDAC. Headquartered in Saarbrücken, Germany, HYDAC International is a globally leading manufacturer of hydraulic and pneumatic components.
The PGI102 series belongs to the Heavy Duty Series and is available in sizes 2, 3, and 6. These internal gear pumps feature compact construction, extremely low noise levels, low pulsation, and a wide speed range. Displacements range from 3.8 cc/rev to 250 cc/rev, with rated pressure up to 330 bar and peak pressure up to 350 bar.
This model, PGI102-2-0061RK03-11-6100, belongs to the PGI102 series Size 2 with a displacement of 6.1 cc/rev. It features an SAE A mounting flange (2-bolt, pilot Ø82.55 mm), an ISO keyed straight shaft Ø20 mm, and clockwise rotation (viewed from the shaft end), making it suitable for a wide range of medium to high-pressure industrial hydraulic systems and servo drive applications.
Interchangeability: The PGI102 series is manufactured to exacting HYDAC original design standards. Mounting flange, shaft type, port dimensions, and rotation direction are fully compliant with genuine HYDAC specifications, enabling 100% drop-in replacement without any system modification.
Technical Specifications
PGI102-2-0061RK03-11-6100
Brand: HYDAC (Germany)
Series: PGI102 Heavy Duty Internal Gear Pump
Size: Size 2
Displacement: 6.1 cm³/rev
Rated pressure: 330 bar
Peak pressure: 350 bar
Maximum speed: 4,000 rpm
Rotation: Clockwise (viewed from shaft end)
Mounting flange: SAE A 2-bolt flange, pilot Ø82.55 mm
Shaft type: ISO keyed straight shaft Ø20 mm
Seals: FKM (Viton)
Port type: SAE flange / Metric thread
Port position: Radial
Housing material: High-strength cast iron / Aluminum (configuration dependent)
Media compatibility: Mineral oil, biodegradable oil (HEES), water glycol (HFC), phosphate ester (HFD-R), etc.
Operating temperature: Recommended 40°C to 60°C
Recommended viscosity range: 15 – 500 mm²/s
Net weight: Approx. 5.5 kg (configuration dependent)
Country of origin: Germany
PGI102 Series Displacement Overview (Size 2)
PGI102-2-004: 3.8 cm³/rev
PGI102-2-005: 5.4 cm³/rev
PGI102-2-006: 6.4 cm³/rev
PGI102-2-008: 7.9 cm³/rev
PGI102-2-011: 10.9 cm³/rev
PGI102-2-013: 13.3 cm³/rev
PGI102-2-016: 15.8 cm³/rev
PGI102-2-019: 19.3 cm³/rev
PGI102-2-022: 22.2 cm³/rev
PGI102-2-025: 25.2 cm³/rev
PGI Series Positioning
PGI100 / PGI101 / PGI103: Medium pressure series, rated pressure up to 250 bar, peak pressure up to 320 bar
PGI102: High pressure series, rated pressure up to 330 bar, peak pressure up to 350 bar
Key Technical Advantages
1. Internal Gear Design for Ultra-Low Noise and Low Pulsation
The PGI102 series features an internal gear design that delivers exceptionally smooth operation. Compared to external gear pumps, the internal gear design offers significantly lower noise levels (test values below 66 dB) and lower output flow pulsation (≤2%), ensuring stable system pressure.
2. Exceptional High-Pressure Capability
The PGI102 series delivers rated pressure up to 330 bar and peak pressure up to 350 bar. This wide pressure range enables flexible adaptation to demanding medium and high-pressure hydraulic system requirements.
3. Wide Speed Range and Displacement Coverage
The PGI102 series achieves maximum speeds up to 4,000 rpm with displacements covering 3.8 cc/rev to 250 cc/rev. The wide speed range enables flexible adaptation to various drive speed applications, from low-flow precision control to high-flow high-pressure output.
4. Excellent Self-Priming Capability and High Volumetric Efficiency
Internal gear pumps offer excellent self-priming performance with minimal internal leakage and high volumetric efficiency. Stable flow output is maintained even under high-speed operating conditions.
5. Flexible Multi-Pump Configurations
The PGI102 series supports multi-pump combinations. Tandem configurations enable multiple independent flow outputs to meet diverse flow and pressure requirements of complex hydraulic systems without the need for additional drive sources. PGI102 can also be combined with PGI101 to form multi-pump units.
6. Wide Media Compatibility
With different seals and materials, the PGI102 series can accommodate various hydraulic media including mineral oil, biodegradable oil (HEES), water glycol (HFC), and phosphate ester (HFD-R). This model is equipped with FKM (Viton) seals as standard, offering excellent high-temperature and chemical resistance.
7. Compact Construction and Lightweight Design
The internal gear design offers compact construction and small physical footprint, making these pumps ideal for industrial and mobile hydraulic applications with space constraints.
Application Areas
Injection Molding Machines – Core power component of servo-hydraulic systems, enabling on-demand oil delivery with servo motors
Die Casting Machines – Stable hydraulic power source under high-pressure, high-flow conditions
Hydraulic Presses & Forming Equipment – Smooth, low-pulsation high-pressure oil supply
Construction Machinery – Excavators, loaders, and other mobile equipment hydraulic systems
Machine Tools & Metal Processing Equipment – Precision hydraulic control systems
Wind Power – Hydraulic control systems for wind turbine generators
Metallurgy Equipment – High-pressure lubrication and cooling circulation systems
Multi-Pump Systems – Complex hydraulic systems requiring multiple independent flow outputs
Expert Maintenance Tips
1. Fluid Cleanliness Management
PGI102 series internal gear pumps are sensitive to fluid contamination. Recommended fluid cleanliness: ISO 4406 18/16/13 (NAS 1638 Class 9) or higher. Install a suction filter with minimum 100 μm filtration and a return line filter with 10 μm filtration.
2. Fluid Viscosity & Temperature Control
Mineral-based hydraulic oils conforming to ISO/DIN standards are recommended. Operating viscosity should be maintained within 15 – 500 mm²/s. Optimal operating temperature: 40 – 60°C. For cold starts, ensure fluid temperature is above -10°C to prevent cavitation due to excessive viscosity.
3. Rotation Direction Verification
Always verify the pump rotation direction indicator before start-up (this model is clockwise rotation). Start with jog operation to confirm correct rotation, then gradually load to operating pressure.
4. Alignment During Installation
Ensure concentricity between pump shaft and drive motor shaft does not exceed 0.05 mm, with angular misalignment within 0.5°. Flexible couplings are recommended to compensate for minor misalignment. SAE A flange installation requires proper bolt torque according to specifications.
5. Suction Conditions
Ensure suction lines are properly sealed to prevent air ingress. Suction line diameter should be sufficiently large and line length kept as short as possible to minimize suction resistance.
6. First Start-Up and Bleeding
Before initial start-up, pre-lubricate the pump by filling clean hydraulic oil through the housing ports. After start-up, run the pump in no-load operation for a few seconds to ensure sufficient lubrication. The pump must be bled before building up system pressure. Never allow the pump to run without oil.
7. Periodic Maintenance
Replace hydraulic oil and filters every 2,000 operating hours or annually. Regularly monitor pump body temperature (surface temperature should not exceed 80°C) and listen for abnormal noise increases, which may indicate internal wear or cavitation.
